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NLE Neurosensory NursingSeizure, Infectious, and Degenerative Neurologic DisordersCheat Sheet

Seizure, Infectious, and Degenerative Neurologic Disorders cheat sheet — the reference card you wish you had on exam day. Condensed from the full study notes, this is the high-yield core of Seizure, Infectious, and Degenerative Neurologic Disorders for NLE Neurosensory Nursing. Download, print, revise.

Exam context

For the Philippine Nurse Licensure Examination (PNLE), Professional Regulation Commission (PRC) — Board of Nursing tests Neurosensory Nursing under a "Core" label, with Seizure, Infectious, and Degenerative Neurologic Disorders in the 3rd slot across 5 chapters. NLE candidates must clear the 75% weighted average with no sub-test below 60% cut on the 2026 paper, which draws about 50 Neurosensory Nursing questions. Date to watch: Bi-annual.

Seizure, Infectious, and Degenerative Neurologic Disorders - Cheat Sheet

Your last-minute revision companion for high-yield neurologic emergencies, infections, and degenerative conditions heavily tested on the NLE. Master seizure management, bacterial meningitis priorities, the myasthenic vs. cholinergic crisis differential, and the clinical hallmarks of Parkinson's, MS, ALS, GBS, and Alzheimer's.

Sections

Section Title

SEIZURES AND EPILEPSY

Important Facts

  • DURING SEIZURE: Turn patient to **lateral (side) position** to prevent aspiration; **loosen tight clothing**; **protect the head**; **do NOT restrain** and **do NOT force anything in the mouth**.
  • ASSESSMENT during seizure: **Time the seizure**, note characteristics (aura, eye movements, incontinence, progression).
  • AFTER SEIZURE: Keep on side, reorient, check for injuries, allow rest; postictal period is normal (drowsiness, confusion).
  • Seizure types in order of medical emergency: **Status epilepticus >> generalized tonic-clonic >> focal with LOC >> focal without LOC >> absence.**
  • Status epilepticus = **MEDICAL EMERGENCY**: risk of hypoxia, hyperthermia, brain injury, death.
  • FIRST-LINE treatment for acute seizure: **IV benzodiazepines** (lorazepam or diazepam) STAT.
  • SECOND-LINE: Load with longer-acting antiseizure drug (phenytoin, fosphenytoin, or levetiracetam) AFTER benzodiazepine.
  • **NEVER abruptly stop antiseizure medications**—can trigger status epilepticus.
  • Patient teaching: Wear **medical identification**, follow **local driving restrictions**, **avoid alcohol**, maintain **steady drug levels**, report breakthrough seizures.

Key Definitions

Term

Seizure

Example

A generalized tonic-clonic seizure with stiffening followed by rhythmic jerking.

Definition

Sudden, abnormal, excessive electrical discharge of neurons.

Term

Epilepsy

Example

A patient with a history of 3+ unprovoked seizures over 6 months.

Definition

Chronic disorder of recurrent, unprovoked seizures.

Term

Status Epilepticus

Example

Back-to-back tonic-clonic seizures lasting 12 minutes without recovery; medical emergency.

Definition

Continuous seizure activity ≥5 minutes or repeated seizures without regaining consciousness between them.

Term

Generalized Seizure

Example

Generalized tonic-clonic, absence, myoclonic seizures.

Definition

Involves both cerebral hemispheres; patient loses consciousness.

Term

Focal Seizure

Example

Focal motor seizure causing jerking of one arm; patient may stay aware.

Definition

Begins in one specific brain area; may or may not have loss of consciousness.

Term

Absence Seizure

Example

Child suddenly stares blankly for 10 seconds, then continues activity unaware of the lapse.

Definition

Brief staring spell, usually 5–10 seconds, with no motor activity; most common in children.

Diagrams To Know

  • Phases of generalized tonic-clonic seizure: aura → tonic (stiffening) → clonic (jerking) → postictal
  • Seizure management algorithm: Safety → Airway → Time → Observation → Medication
  • Status epilepticus hierarchy: Assess ABCs → Glucose check → IV benzodiazepine → Load antiseizure drug → Support

Common Values

Value

10–20 mcg/mL

Symbol

TL

Quantity

Phenytoin therapeutic level

Value

≤50 mg/min

Symbol

Rate

Quantity

Phenytoin IV infusion rate

Section Title

ANTISEIZURE MEDICATIONS

Important Facts

  • **Phenytoin IV**: Give in **normal saline ONLY** (precipitates in dextrose); give **slowly ≤50 mg/min** to avoid hypotension and dysrhythmias.
  • **Phenytoin therapeutic level**: 10–20 mcg/mL (some sources 8–12); above 20 = toxicity.
  • **Phenytoin side effects**: **Gingival hyperplasia** (teach meticulous oral hygiene), nystagmus, ataxia, diplopia, hirsutism, rash.
  • **Phenytoin drug interactions**: High protein binding; interacts with warfarin, oral contraceptives, many others.
  • **Carbamazepine**: Induces own metabolism (autoinduction); monitor for hyponatremia, rash (SJS risk), CBC.
  • **Lamotrigine**: Risk of **Stevens-Johnson syndrome (SJS)**—teach patient to report rash immediately.
  • **Benzodiazepines (lorazepam, diazepam)**: Acute seizure termination; watch for **respiratory depression and sedation**.
  • **Dosing consistency is CRITICAL**: Missed doses → low levels → breakthrough seizures → status epilepticus.
  • **High-protein meals can interfere with phenytoin and levodopa absorption**—space from meals.

Key Definitions

Term

Phenytoin (Dilantin)

Example

Loading dose 15–20 mg/kg IV at ≤50 mg/min in normal saline only.

Definition

Mainstay antiseizure drug; directly stabilizes neuronal membranes.

Term

Levetiracetam (Keppra)

Example

Often preferred for renal failure or polypharmacy situations.

Definition

Modern antiseizure drug; no protein binding, fewer drug interactions.

Term

Valproic Acid (Depakote)

Example

Monitor LFTs and platelets; risk of hepatotoxicity and thrombocytopenia.

Definition

Broad-spectrum antiseizure drug; requires liver and platelet monitoring.

Diagrams To Know

  • Drug levels: subtherapeutic → therapeutic (10–20) → toxic (>20) and correlation with seizure control vs. side effects

Common Values

Value

>100 mg/dL (typically 200–500)

Symbol

Protein_B

Quantity

Bacterial meningitis CSF protein

Value

<40 mg/dL or ratio <0.4

Symbol

Glucose_B

Quantity

Bacterial meningitis CSF glucose

Value

≥40 mg/dL (normal)

Symbol

Glucose_V

Quantity

Viral meningitis CSF glucose

Value

IMMEDIATELY (no delay)

Symbol

T_Abx

Quantity

Time to start antibiotics in bacterial meningitis

Section Title

CENTRAL NERVOUS SYSTEM INFECTIONS

Important Facts

  • **CLASSIC TRIAD of bacterial meningitis**: Fever + Severe Headache + Nuchal Rigidity (stiff neck).
  • Associated symptoms: **Photophobia, altered LOC, seizures, nausea, vomiting, confusion**.
  • **Lumbar puncture (LP) findings—BACTERIAL vs. VIRAL**:
  • • **BACTERIAL**: Cloudy CSF; **HIGH protein (>100 mg/dL)**; **LOW glucose (<40 mg/dL or CSF:blood ratio <0.4)**; **HIGH neutrophils (>80%)**; **HIGH pressure**.
  • • **VIRAL**: Clear CSF; Normal/mildly elevated protein; **Normal glucose (>40 mg/dL)**; **Lymphocytes (not neutrophils)**; Normal or slightly elevated pressure.
  • **MENINGOCOCCAL MENINGITIS** → petechial/purpuric rash + can progress to **Waterhouse-Friderichsen syndrome** (septic shock, adrenal failure, DIC).
  • **DO NOT DELAY ANTIBIOTICS** in suspected bacterial meningitis—start **empiric IV antibiotics BEFORE culture results**.
  • Common empiric regimens: **Ceftriaxone ± vancomycin ± ampicillin** (depends on age, local resistance patterns).
  • **Dexamethasone (corticosteroid)** given with or before antibiotics to reduce ICP and complications.
  • **DROPLET PRECAUTIONS** for meningococcal and H. influenzae meningitis until **24 hours of effective antibiotics**.
  • **Prophylaxis for close contacts** (meningococcal, H. influenzae): Rifampin, ciprofloxacin, or ceftriaxone.
  • Nursing environment: **Quiet, dimly lit room** (photophobia); monitor ICP; manage headache; monitor vitals and neuro status closely.
  • **Herpes encephalitis**: Treat immediately with **IV acyclovir** (don't wait for confirmation); mortality high without treatment.
  • **Japanese encephalitis** (arbovirus endemic in Philippines): **Vector control and vaccination** are key prevention; supportive care for cases.

Key Definitions

Term

Meningitis

Example

Fever + severe headache + nuchal rigidity = bacterial meningitis until proven otherwise.

Definition

Inflammation of the meninges (dura, arachnoid, pia); bacterial or viral.

Term

Bacterial Meningitis

Example

A febrile patient with fever 39°C, severe headache, and stiff neck that should receive **antibiotics immediately**.

Definition

Life-threatening infection of meninges; most common organisms: **N. meningitidis, S. pneumoniae**.

Term

Viral Meningitis

Example

CSF shows lymphocytic pleocytosis, normal glucose, clear fluid.

Definition

Inflammation of meninges by virus; generally self-limiting; milder than bacterial.

Term

Encephalitis

Example

Fever + altered mental status + seizures = encephalitis.

Definition

Inflammation of brain tissue itself; often viral (HSV is most common sporadic; arboviruses in tropics like Philippines).

Term

Kernig's Sign

Example

Patient supine, hip/knee flexed to 90°; extending knee causes pain or resistance.

Definition

Pain or resistance when extending the knee with the hip flexed; suggests meningitis.

Term

Brudzinski's Sign

Example

Neck flexion automatically causes the patient's hips and knees to flex.

Definition

Involuntary hip/knee flexion when the neck is flexed; suggests meningitis.

Term

Petechial/Purpuric Rash

Example

Non-blanching rash on extremities and trunk in meningococcal meningitis; sign of septicemia.

Definition

Small red/purple spots (petechiae) or larger blotches (purpura) on skin; seen in meningococcemia.

Diagrams To Know

  • CSF findings: Bacterial (cloudy, high protein, low glucose, neutrophils) vs. Viral (clear, normal glucose, lymphocytes)
  • Meningitis pathway: Infection → Meningeal inflammation → Classic triad → Complications (sepsis, DIC, seizures)
  • Kernig's and Brudzinski's signs: How to elicit and what positive result looks like

Section Title

PARKINSON'S DISEASE

Important Facts

  • **CLASSIC TRIAD**: **Tremor (resting, pill-rolling) + Rigidity (cogwheel) + Bradykinesia (slow movement)**.
  • Additional features: **Postural instability, shuffling festinating gait, mask-like face, micrographia, stooped posture**.
  • **Levodopa-carbidopa** is the cornerstone: Levodopa → dopamine in brain; carbidopa blocks peripheral conversion.
  • **Dosing strategy**: Give **on a consistent schedule**; HIGH-PROTEIN MEALS INTERFERE with absorption.
  • **Side effects of levodopa**: **Dyskinesias, orthostatic hypotension, on-off phenomenon (sudden loss of effect), wearing-off (shorter duration)**.
  • **Dopamine agonists** (pramipexole, ropinirole): Used alone early or with levodopa to reduce dyskinesias.
  • **MAO-B inhibitors** (selegiline, rasagiline): Slow dopamine breakdown; used early monotherapy or adjunct.
  • **COMT inhibitors** (entacapone): Inhibit catecholamine metabolism; extend levodopa duration.
  • **Anticholinergics** (benztropine, trihexyphenidyl): Useful for **tremor early**; avoided in elderly due to cognitive side effects.
  • **Nursing care priorities**: Fall prevention (supervised ambulation, environmental safety), exercise/PT (slow progression), small frequent nutrient-dense meals, swallowing precautions, allow extra time for activities.
  • **Deep brain stimulation (DBS)** is surgical option for advanced disease with motor complications.
  • TEACHING: **Do NOT skip doses**; take meals 1–2 hours before/after levodopa; expect gradual decline over years; safety measures for falls and orthostasis.

Key Definitions

Term

Parkinson's Disease

Example

Patient with resting tremor, muscle rigidity, and slow movements (bradykinesia).

Definition

Progressive degenerative disorder caused by loss of dopamine-producing neurons in substantia nigra.

Term

Tremor (Pill-Rolling)

Example

Tremor improves with movement and sleep; worsens at rest.

Definition

Resting tremor of 4–6 Hz; looks like rolling a pill between fingers.

Term

Rigidity (Cogwheel)

Example

Passive range of motion has a 'stop-and-go' quality rather than smooth resistance.

Definition

Increased muscle tone throughout movement; feels like a ratchet or cogwheel.

Term

Bradykinesia

Example

Patient takes longer to dress, write (micrographia), or walk.

Definition

Slowness of movement; difficulty initiating and maintaining movement.

Term

Postural Instability

Example

Patient has difficulty maintaining balance or recovering when pushed.

Definition

Loss of righting reflexes; increased fall risk.

Diagrams To Know

  • Dopamine-acetylcholine balance in Parkinson's: Loss of dopamine → relative excess acetylcholine → symptoms
  • Levodopa mechanism: Levodopa (crosses BBB) → Dopamine + Carbidopa (blocks peripheral conversion)

Section Title

MULTIPLE SCLEROSIS (MS)

Important Facts

  • **Typical presentation**: Young to middle-aged adults, more often **women**.
  • **MOST COMMON and DISABLING symptom**: **FATIGUE** (not weakness).
  • **Other manifestations**: Optic neuritis (blurred vision, color blindness), diplopia, weakness, spasticity, numbness/tingling, ataxia, bladder/bowel dysfunction, cognitive changes.
  • **Diagnosis**: **MRI** (demyelinating plaques in brain/spinal cord) + **CSF analysis** (elevated IgG, oligoclonal bands).
  • **Triggers to avoid**: **Heat, stress, infection**—all can worsen symptoms or trigger relapses.
  • **Acute relapse treatment**: **IV corticosteroids (methylprednisolone)** to speed recovery.
  • **Disease-modifying therapies (DMTs)**: **Interferon beta (Betaseron, Avonex), glatiramer acetate (Copaxone), newer agents (natalizumab, fingolimod)**—reduce relapse frequency and slow progression.
  • **Nursing care**: Energy conservation techniques, fall prevention, fatigue management, heat avoidance, PT/OT, psychosocial support, education on DMT adherence.
  • **Teach**: Monitor for relapse signs (new neurologic symptoms); avoid heat exposure; maintain exercise; report medication side effects; connection with MS support groups.

Key Definitions

Term

Multiple Sclerosis

Example

Young adult with optic neuritis, weakness, and MRI showing demyelinating plaques.

Definition

Chronic autoimmune disorder with demyelination of CNS neurons (myelin destruction disrupts conduction).

Term

Relapsing-Remitting MS (RRMS)

Example

Patient has optic neuritis episode (relapse), improves over weeks (remission), then has leg weakness months later.

Definition

Most common type; alternating periods of new symptoms (relapses) and recovery (remission).

Term

Demyelination

Example

Patches of demyelination (plaques) visible on brain/spinal cord MRI.

Definition

Loss of myelin sheath around axons in CNS; disrupts nerve signal conduction.

Diagrams To Know

  • MS relapse-remission cycle: Normal → Relapse (exacerbation) → Remission → Stable → Next relapse
  • Demyelination process: Normal axon → Myelin damage → Conduction slowing/blocks

Section Title

AMYOTROPHIC LATERAL SCLEROSIS (ALS)

Important Facts

  • **Key feature**: **Motor neurons die**, causing **progressive weakness, atrophy, fasciculations, spasticity, dysarthria, dysphagia**.
  • **Sensation, cognition, eye movements are PRESERVED**—patient retains awareness.
  • **No cure**; **riluzole** modestly slows progression (~2–3 months longer survival).
  • **Death usually from RESPIRATORY FAILURE** as diaphragm and intercostal muscles weaken.
  • **Nursing care**: Respiratory support planning (BiPAP, mechanical ventilation decision-making), **aspiration precautions**, nutrition (swallowing assessment, G-tube if needed), communication aids, advance care planning, psychosocial support.
  • **Teach**: Realistic prognosis, advance directives, palliative care options, genetic counseling if familial ALS, support resources (ALS Association).
  • Progression is relentless; average survival 2–5 years from symptom onset; patient awareness throughout is both a burden and an opportunity for dignity-preserving care.

Key Definitions

Term

Amyotrophic Lateral Sclerosis (ALS)

Example

Patient with progressive weakness, atrophy, fasciculations, but normal sensation and eye movements.

Definition

Progressive degeneration of motor neurons (upper and lower); causes worsening weakness and atrophy; sensation and cognition preserved.

Term

Fasciculations

Example

Fine, rapid, uncoordinated muscle twitches visible in limb or tongue.

Definition

Visible, involuntary muscle twitching under the skin from dying motor neurons.

Term

Dysarthria

Example

Speech becomes slurred and weak as respiratory and pharyngeal muscles weaken.

Definition

Difficulty with articulation of speech.

Term

Dysphagia

Example

Progressive difficulty swallowing food and saliva; high aspiration risk.

Definition

Difficulty swallowing.

Diagrams To Know

  • Motor neuron vs. preserved function: Motor (weak, atrophic) vs. Sensory (normal) vs. Cognition (normal) vs. Eye movement (normal)

Section Title

MYASTHENIA GRAVIS (MG) AND MYASTHENIC VS. CHOLINERGIC CRISIS

Important Facts

  • **Hallmark**: **Weakness that WORSENS with activity and IMPROVES with rest** (opposite of most diseases).
  • **Classic symptoms**: **Ptosis (drooping eyelids), diplopia (double vision), weak voice, difficulty chewing/swallowing, generalized weakness**.
  • **Respiratory muscles can be affected** → respiratory failure → danger.
  • **Diagnosis**: Serology (ACh receptor antibodies), **edrophonium (Tensilon) test**, electromyography (EMG).
  • **First-line drug**: **Pyridostigmine (Mestinon)** (anticholinesterase); improves strength by increasing available ACh.
  • **Dosing critically important**: Give **BEFORE MEALS** (to maximize chewing/swallowing); consistent timing required.
  • **Side effects of anticholinesterases**: Muscarinic (salivation, diarrhea, cramps, miosis) and nicotinic (fasciculations, weakness).
  • **Immunosuppressants**: Corticosteroids, azathioprine, mycophenolate for long-term control.
  • **Acute exacerbation treatment**: Plasmapheresis or IV immunoglobulin (IVIG); remove or neutralize antibodies.
  • **Thymectomy**: Often beneficial if positive chest imaging (thymoma) or even without (remission possible).
  • ---
  • **MYASTHENIC CRISIS vs. CHOLINERGIC CRISIS (CRITICAL DIFFERENTIAL)**:
  • | Feature | Myasthenic Crisis | Cholinergic Crisis |
  • | --- | --- | --- |
  • | **Cause** | TOO LITTLE medication (missed doses, infection, stress, surgery) | TOO MUCH medication (overdose, toxicity) |
  • | **Weakness** | Worsens (under-treated) | Worsens (over-treated) |
  • | **SLUDGE** | Absent | Present (salivation, lacrimation, urination, defecation, GI, emesis) |
  • | **Fasciculations** | Absent | Present (visible muscle twitches) |
  • | **Pupils** | Normal | Pinpoint (miosis) |
  • | **Tensilon test** | **IMPROVES strength** → needs more drug | **WORSENS strength** → already has too much |
  • | **Management** | Increase anticholinesterase; support airway | STOP anticholinesterase; give **ATROPINE** (antidote); support airway |
  • **TENSILON TEST MECHANISM**: Edrophonium is a short-acting anticholinesterase. **Improvement = myasthenic** (needs more ACh). **Worsening = cholinergic** (already has excess).
  • **ATROPINE**: Anticholinergic antidote for cholinergic crisis; blocks excess muscarinic effects.
  • **PRIORITY IN EITHER CRISIS**: **AIRWAY and VENTILATORY SUPPORT**; both cause respiratory failure.
  • **Keep atropine and edrophonium at bedside** for crisis patients with MG.

Key Definitions

Term

Myasthenia Gravis

Example

Patient with ptosis and diplopia that worsen after talking; improve after rest or anticholinesterase medication.

Definition

Autoimmune disorder; antibodies attack acetylcholine receptors at neuromuscular junction → fluctuating weakness worsening with activity, improving with rest.

Term

Acetylcholinesterase Inhibitor (Anticholinesterase)

Example

Pyridostigmine (Mestinon) given before meals to maximize chewing and swallowing strength.

Definition

Drug that blocks acetylcholinesterase, preventing breakdown of acetylcholine → increases available ACh at NMJ.

Term

Myasthenic Crisis

Example

Patient skips doses → weak, cannot breathe → needs mechanical ventilation.

Definition

Acute respiratory failure from **TOO LITTLE** anticholinesterase medication; weakness worsens.

Term

Cholinergic Crisis

Example

Patient overdoses on pyridostigmine → excessive salivation, lacrimation, urination, defecation, GI upset, emesis, plus muscle weakness.

Definition

Acute respiratory failure from **TOO MUCH** anticholinesterase medication (overdose); excess ACh causes **SLUDGE** and weakness.

Term

SLUDGE Syndrome

Example

Drooling, tearing, frequent urination, diarrhea, nausea/vomiting due to too much anticholinesterase.

Definition

**S**alivation, **L**acrimation, **U**rination, **D**efecation, **G**I upset, **E**mesis—signs of excess acetylcholine (cholinergic crisis).

Diagrams To Know

  • Myasthenic vs. Cholinergic Crisis: Cause (too little vs. too much) → Presentation (weak without SLUDGE vs. weak with SLUDGE) → Tensilon test (improve vs. worsen) → Treatment (increase drug vs. STOP + atropine)
  • Acetylcholine physiology: Normal → Reduced receptors (MG) → Weakness; Treated with anticholinesterase → More ACh available → Better strength (until too much = cholinergic crisis)

Section Title

GUILLAIN-BARRÉ SYNDROME (GBS)

Important Facts

  • **Trigger**: Often follows viral or bacterial infection (URI, GI illness, Zika virus, Campylobacter jejuni).
  • **Onset**: Usually begins 1–3 weeks after infection; rapid progression (hours to days).
  • **Classic progression**: **Ascending symmetric weakness** starting in legs, moving to arms, trunk, face; **diminished/absent reflexes**.
  • **CHIEF DANGER**: **Ascending paralysis reaching respiratory muscles** → respiratory failure → ICU/mechanical ventilation.
  • **PRIORITY MONITORING**: **Serial vital capacity (VC) measurements** and respiratory assessment; **never relax vigilance**.
  • **Autonomic instability**: Tachycardia, hypertension/hypotension, arrhythmias, urinary retention.
  • **Diagnosis**: Clinical presentation + elevated CSF protein (without pleocytosis—"albuminocytologic dissociation") + NCS/EMG showing demyelination.
  • **Treatment**: **Plasmapheresis** or **IV immunoglobulin (IVIG)**; both remove/neutralize antibodies; usually given early.
  • **Prognosis**: Most patients plateau within 2–4 weeks; then gradual recovery over weeks to months; 80% make good recovery; 20% have residual weakness.
  • **Nursing care PRIORITY**: **Respiratory support** (mechanical ventilation ready), **immobility prevention** (DVT prophylaxis, skin care, PT), **pain management**, **nutrition/swallowing**, **psychosocial support**, monitor for autonomic changes.
  • **Teach**: Realistic recovery timeline; reassure that sensation is intact (patient feels everything but cannot move); need for family involvement; support during recovery.

Key Definitions

Term

Guillain-Barré Syndrome

Example

Patient develops leg weakness that spreads to arms and trunk over days; diminished reflexes.

Definition

Acute autoimmune disorder; myelin of peripheral nerves attacked → ascending symmetric weakness and paralysis beginning in legs, moving upward.

Term

Ascending Paralysis

Example

Leg paralysis → trunk weakness → arm paralysis → facial weakness → respiratory muscle paralysis.

Definition

Weakness/paralysis that begins distally (legs) and progresses proximally (toward head and respiratory muscles).

Term

Areflexia

Example

Absent patellar, achilles, and other reflexes in GBS.

Definition

Loss of deep tendon reflexes due to peripheral nerve damage.

Diagrams To Know

  • GBS progression: Lower limbs → Upper limbs → Trunk → Respiratory muscles (ascending order)
  • GBS timeline: Infection → 1–3 weeks → Ascending weakness (rapid) → Plateau (2–4 weeks) → Gradual recovery (weeks to months)

Section Title

ALZHEIMER'S DISEASE AND DEMENTIA

Important Facts

  • **DEMENTIA vs. DELIRIUM** (critical distinction for exams):
  • • **Dementia**: Slow onset (months/years), progressive, **irreversible**, stable/consistent, alert, sleep-wake intact, caused by neurodegeneration.
  • • **Delirium**: Acute onset (hours/days), **fluctuating** (worsens and improves), **REVERSIBLE** if cause treated, disoriented, sleep-wake disrupted, caused by infection/drugs/hypoxia/etc.
  • **Alzheimer's pathology**: Beta-amyloid plaques + neurofibrillary tangles → neuronal death → progressive cognitive decline.
  • **Stages**: Early (forgetfulness, mild confusion) → Middle (confusion worsens, wandering, behavior change) → Late (total dependence, minimal communication).
  • **Cholinesterase inhibitors** (donepezil, rivastigmine, galantamine): Modest benefit (~6–12 months); **reduce acetylcholinesterase breakdown** to improve available ACh.
  • **Memantine** (NMDA receptor antagonist): Moderate-to-severe disease; modestly improves cognition/function.
  • **Non-pharmacologic care** is CORNERSTONE:
  • • **Safety**: Wandering precautions (locks, alarms, ID bracelets), fall prevention.
  • • **Structure**: Consistent routine, familiar faces, simple environment.
  • • **Communication**: Short, simple sentences; face-to-face; **validation** (acknowledge feelings without correcting facts).
  • • **Orientation**: Calendars, clocks, photos; repeated orientation; memory aids.
  • • **Activity**: Purposeful activity, music, reminiscence therapy.
  • **Caregiver support**: Critical for family burnout; respite care, support groups, education on progression.
  • **Behavioral symptoms**: Agitation, aggression, sundowning (increased confusion at dusk) — manage with non-pharmacologic means first; medications as last resort.
  • **End-of-life planning**: Advance directives, code status, palliative care discussion while patient can participate.

Key Definitions

Term

Dementia

Example

Gradual memory loss, confusion, wandering, loss of ADL independence.

Definition

Syndrome of progressive decline in memory, cognition, judgment, personality, and function; irreversible.

Term

Alzheimer's Disease

Example

60-year-old with insidious memory loss progressing to confusion, personality change, and total dependence.

Definition

Most common cause of dementia; progressive neurodegeneration with beta-amyloid plaques and neurofibrillary tangles.

Term

Delirium

Example

Patient suddenly confused after anesthesia, infection, or medication change; confusion improves when cause is treated.

Definition

Acute, fluctuating change in mental status with an identifiable cause; REVERSIBLE (opposite of dementia).

Term

Cholinesterase Inhibitors

Example

Donepezil, rivastigmine, galantamine.

Definition

Drugs that increase acetylcholine levels in brain; modestly slow cognitive decline in Alzheimer's.

Diagrams To Know

  • Dementia vs. Delirium: Onset (slow vs. acute), Progression (progressive vs. fluctuating), Reversibility (irreversible vs. reversible), Cause (neurodegeneration vs. medical/toxic)
  • Alzheimer's stages: Early (forgetfulness) → Middle (confusion, wandering, behavior change) → Late (total dependence, minimal communication)
  • Nursing interventions by stage: Early (psychoeducation, memory aids) → Middle (safety, routine, validation) → Late (comfort, hygiene, dignity)

Section Title

COMPLICATIONS COMMON TO ALL NEUROLOGIC DISORDERS

Important Facts

  • **ASPIRATION RISK**: ALS, MG, Parkinson's, stroke, myositis → **Assess swallowing; NPO if unsafe; consider G-tube**.
  • **RESPIRATORY FAILURE**: ALS (diaphragm), GBS (ascending), severe Parkinson's, MG crisis → **Monitor vital capacity, have intubation plan**.
  • **IMMOBILITY COMPLICATIONS**: DVT/PE, pressure ulcers, contractures, muscle atrophy → **Prophylaxis (SCD, anticoagulation), frequent turning, ROM, mobilization**.
  • **INFECTION RISK**: Indwelling catheters, aspiration, immobility → **Sterile technique, infection precautions, early ambulation**.
  • **SEIZURES in degenerative disorders**: Alzheimer's, Parkinson's, ALS can have seizures → **Fall precautions, medication adherence**.
  • **MEDICATION TOXICITY**: Phenytoin gingival hyperplasia, anticholinergic effects, cholinergic toxicity → **Monitoring, teaching on toxicity signs, dose timing**.
  • **MEDICATION WITHDRAWAL**: Sudden stop of seizure meds, Parkinson's meds → **Status epilepticus, worsening of symptoms → NEVER stop abruptly**.
  • **PAIN MANAGEMENT**: Chronic pain in neuropathies, MS, ALS → **Multimodal approach; never undertreat**.
  • **BOWEL/BLADDER DYSFUNCTION**: Many neurologic disorders → **Bowel regimen, catheter care, UTI prevention**.
  • **COGNITIVE/BEHAVIORAL ISSUES**: Dementia, Parkinson's, MS → **Safety, structure, behavioral strategies, medication if necessary**.

Key Definitions

Term

Aspiration

Example

Patient with weakened swallowing aspirates food; develops pneumonia.

Definition

Entry of food/liquids or secretions into the airway; risk in disorders with dysphagia (ALS, MG, stroke, Parkinson's).

Term

Status Epilepticus

Example

See Seizures section.

Definition

Continuous seizure activity ≥5 minutes or repeated seizures without recovery; medical emergency with high mortality if untreated.

Term

Respiratory Failure

Example

ALS patient with diaphragm paralysis; GBS with ascending to respiratory muscles.

Definition

Inadequate gas exchange; requires mechanical ventilation.

Term

Deep Vein Thrombosis (DVT) and Pulmonary Embolism (PE)

Example

GBS patient with leg paralysis develops DVT; PE can be fatal.

Definition

Clotting from immobility; risk in paralyzed/bedridden patients.

Diagrams To Know

  • Immobility cascade: Paralysis → Immobility → DVT/PE risk, pressure ulcers, contractures, atrophy
  • Aspiration pathway: Dysphagia → Food enters airway → Aspiration pneumonia → Respiratory compromise

Must Remember

Item

**SEIZURE DURING EXAM**: Turn patient **LATERAL (side)** to prevent aspiration. **DO NOT restrain**, **DO NOT force anything in mouth**. **Time the seizure**. Protect from injury.

Priority

CRITICAL — Life-saving intervention

Item

**STATUS EPILEPTICUS = Seizure ≥5 minutes or repeated seizures without recovery between them = MEDICAL EMERGENCY**. Immediate **IV benzodiazepines (lorazepam or diazepam)**, then load with longer-acting drug (phenytoin, fosphenytoin, or levetiracetam).

Priority

CRITICAL — Know first-line meds

Item

**NEVER ABRUPTLY STOP** antiseizure medications (can trigger status epilepticus). Teach **consistent dosing**, **steady blood levels**, **medical identification**, **no alcohol**.

Priority

HIGH — Common teaching point

Item

**BACTERIAL MENINGITIS = Fever + Severe Headache + Nuchal Rigidity (stiff neck)** + possibly Kernig's and Brudzinski's signs + petechial/purpuric rash (meningococcal). **START ANTIBIOTICS IMMEDIATELY** (don't wait for culture). **Droplet precautions** ×24 hours of effective antibiotics.

Priority

CRITICAL — Classic triad

Item

**MYASTHENIC CRISIS vs. CHOLINERGIC CRISIS**: Both cause respiratory failure. **Myasthenic = TOO LITTLE drug** (weakness worsens); **Cholinergic = TOO MUCH drug** (SLUDGE, fasciculations, miosis present). **Tensilon test**: Improves = myasthenic; Worsens = cholinergic. **Antidote for cholinergic**: **ATROPINE**. **PRIORITY IN EITHER: Airway/ventilation**.

Priority

CRITICAL — High-yield differential

Item

**PARKINSON'S = Tremor (resting, pill-rolling) + Rigidity (cogwheel) + Bradykinesia (slow movement)**. **Levodopa-carbidopa** cornerstone; **take on consistent schedule**; **high-protein meals interfere with absorption**. **Gingival hyperplasia** is side effect (oral hygiene). Watch for dyskinesias, orthostatic hypotension, on-off phenomenon.

Priority

HIGH — Classic triad

Item

**GUILLAIN-BARRÉ = Acute ascending symmetric paralysis from legs upward**, diminished reflexes, often follows infection. **PRIORITY = Respiratory monitoring (vital capacity)** — ascending can reach respiratory muscles. Treat with plasmapheresis or IVIG. Usually self-limiting; gradual recovery over weeks to months.

Priority

CRITICAL — Ascending pattern + respiratory priority

Item

**ALS = Motor neuron death** with worsening weakness, atrophy, fasciculations, dysphagia, dysarthria, BUT **sensation and cognition PRESERVED**. **Death from respiratory failure**. **Riluzole** modestly slows it. Focus on swallowing precautions, respiratory support, nutrition, advance planning.

Priority

HIGH — Preserved sensation/cognition distinguishes it

Item

**ALZHEIMER'S = Irreversible dementia** (most common cause). Distinguish from **delirium** (acute, fluctuating, REVERSIBLE, identifiable cause). Alzheimer care: **Safety (wandering, falls), routine, simple communication, validation, caregiver support**. **Cholinesterase inhibitors** (donepezil, rivastigmine, galantamine) and **memantine** modestly slow decline.

Priority

HIGH — Dementia vs. delirium critical distinction

Item

**MULTIPLE SCLEROSIS = CNS demyelination**, usually relapsing-remitting. **MOST COMMON/DISABLING symptom = FATIGUE** (not weakness). Avoid **heat, stress, infection triggers**. **Acute relapses**: IV corticosteroids. **Disease-modifying therapies** (interferon, glatiramer, newer agents) reduce relapse frequency and slow progression.

Priority

HIGH — Fatigue is key; triggers to avoid

Last Minute Tips

Tip

**SEIZURE MANAGEMENT**: "Side-protect-time" = Turn LATERAL, Protect from injury, TIME the seizure. This mantra covers the three critical actions. Never restrain or mouth-guard (old teaching is WRONG).

Context

Exam scenario: Patient seizing in hospital. What do you do first? Answer: Position lateral.

Tip

**MENINGITIS = ANTIBIOTICS FIRST**: If you see fever + stiff neck on exam, your first action is antibiotics STAT, not LP, not cultures, not waiting. **LP can be done after antibiotics started**. This is a common exam trap.

Context

Exam scenario: Patient admitted with fever, headache, stiff neck. What is the immediate intervention? Answer: Start empiric IV antibiotics (ceftriaxone, vancomycin ± ampicillin).

Tip

**MYASTHENIC vs. CHOLINERGIC**: If exam asks about **SLUDGE, fasciculations, or miosis**, it's **cholinergic crisis** (TOO MUCH drug). If weakness with **NO SLUDGE/fasciculations**, it's **myasthenic** (TOO LITTLE). The Tensilon test is confirmatory but clinical signs often tell you first.

Context

Exam scenario: MG patient presents with respiratory failure, drooling, diarrhea, pinpoint pupils. Is this myasthenic or cholinergic? Answer: Cholinergic (SLUDGE present = too much drug = stop it and give atropine).

Tip

**PHENYTOIN IV**: Remember **NS ONLY** (not dextrose) and **≤50 mg/min slow**. One of the most commonly tested antiseizure drug details. Forgetting this = wrong answer on IV push rate or precipitate forming.

Context

Exam scenario: You're loading phenytoin IV in a seizing patient. What do you use as diluent? Answer: Normal saline only.

Tip

**GBS RESPIRATORY PRIORITY**: On exam, if you see ascending weakness, the question is almost always testing whether you know to **monitor vital capacity and have mechanical ventilation ready**. Don't focus only on plasmapheresis/IVIG; respiratory support is the priority intervention.

Context

Exam scenario: GBS patient with leg weakness. What is your immediate nursing priority? Answer: Monitor respiratory function (vital capacity); prepare for possible intubation.

Comparison Tables

Rows

Values

  • Loss (always)
  • 60–90 sec typically
  • Aura → Tonic (stiffening) → Clonic (jerking) → Postictal
  • Yes (confusion, drowsiness, soreness)
  • Any age

Property

Generalized Tonic-Clonic

Values

  • Loss (brief staring)
  • 5–10 sec
  • Sudden staring, no motor activity
  • Minimal to none; patient unaware
  • Children (3–8 yr)

Property

Absence

Values

  • Preserved or partial loss
  • Variable
  • Jerking in one limb or area
  • Mild confusion if LOC
  • Any age

Property

Focal Motor

Values

  • Preserved usually
  • Seconds
  • Sudden, brief muscle jerks
  • Minimal
  • Variable

Property

Myoclonic

Columns

  • Seizure Type
  • Consciousness
  • Duration
  • Phases
  • Postictal State
  • Most Common Age

Table Title

Seizure Types: Classification and Clinical Features

Rows

Values

  • N. meningitidis, S. pneumoniae, H. influenzae, GBS
  • Enteroviruses, HSV-2, mumps, measles

Property

Common Organisms

Values

  • Sudden (hours)
  • Gradual (hours to days)

Property

Onset

Values

  • Severe; often septic appearance; lethal if untreated
  • Milder; usually self-limiting

Property

Severity

Values

  • Cloudy/turbid
  • Clear

Property

CSF Appearance

Values

  • >100 mg/dL (often 200–500)
  • Normal to mildly elevated (<100)

Property

CSF Protein

Values

  • <40 mg/dL or ratio <0.4
  • Normal (>40 mg/dL)

Property

CSF Glucose

Values

  • Neutrophils (>80%)
  • Lymphocytes

Property

CSF WBC Predominant

Values

  • Elevated (often >250 mm H₂O)
  • Normal to slightly elevated

Property

CSF Pressure

Values

  • Yes (meningococcal)
  • No

Property

Petechial/Purpuric Rash

Values

  • Immediate IV antibiotics + dexamethasone (do not delay)
  • Supportive (no antibiotic; antivirals if HSV)

Property

Treatment

Values

  • Yes (24 hrs of effective antibiotics)
  • No (standard precautions)

Property

Droplet Precautions

Columns

  • Feature
  • Bacterial Meningitis
  • Viral Meningitis

Table Title

CNS Infections: Bacterial vs. Viral Meningitis

Rows

Values

  • **TOO LITTLE** anticholinesterase medication
  • **TOO MUCH** anticholinesterase medication (overdose)

Property

ROOT CAUSE

Values

  • Missed doses, infection, stress, surgery, fatigue
  • Medication overdose, toxicity, renal failure (increased accumulation)

Property

Triggers

Values

  • **Worsens** (under-treated)
  • **Worsens** (over-treated)

Property

Muscle Weakness

Values

  • **ABSENT**
  • **PRESENT** (Salivation, Lacrimation, Urination, Defecation, GI upset, Emesis)

Property

SLUDGE Symptoms

Values

  • Absent
  • **PRESENT** (visible twitches from excess ACh)

Property

Muscle Fasciculations

Values

  • Normal
  • **Pinpoint (miosis)** from excess ACh

Property

Pupils

Values

  • Failure from weakness (needs ventilation)
  • Failure from weakness + respiratory muscle fasciculations

Property

Respiratory Status

Values

  • **IMPROVES strength** → Needs more acetylcholine
  • **WORSENS strength** → Already has excess acetylcholine

Property

Tensilon Test Result

Values

  • **Increase or restart anticholinesterase** (give more drug); Support airway
  • **STOP anticholinesterase immediately**; Give **ATROPINE** (anticholinergic antidote); Support airway

Property

TREATMENT

Values

  • **Airway & ventilatory support** (FIRST); then increase medication
  • **Airway & ventilatory support** (FIRST); then ATROPINE for muscarinic effects

Property

Priority Intervention

Columns

  • Feature
  • Myasthenic Crisis
  • Cholinergic Crisis

Table Title

Myasthenic Crisis vs. Cholinergic Crisis (CRITICAL DIFFERENTIAL)

Rows

Values

  • 50–60+ yr
  • Gradual (years)
  • Slowly progressive; staged over decades
  • Tremor, rigidity, bradykinesia
  • Manageable; Lifespan near-normal with treatment

Property

Parkinson's Disease

Values

  • 20–40 yr (women > men)
  • Acute relapse (sudden)
  • Relapses and remissions
  • Demyelination; fatigue is #1 symptom
  • Highly variable; most remain ambulatory; average lifespan ~5 yrs less

Property

Multiple Sclerosis

Values

  • 50–70 yr typically
  • Gradual (months)
  • Rapidly progressive; months to few years
  • Motor neuron loss; sensation/cognition normal
  • Poor; death in 2–5 yrs from respiratory failure; no cure

Property

ALS

Values

  • 20–40 yr (women); 50–70 yr (men)
  • Acute or gradual
  • Fluctuating; improves/worsens daily
  • Weakness worse with activity, better with rest
  • Good with treatment; many achieve remission with thymectomy/immunotherapy

Property

Myasthenia Gravis

Values

  • Any age (peaks 40–60)
  • Acute (days) after infection
  • Rapid ascending; plateau in 2–4 wks
  • Ascending paralysis; absent reflexes
  • Good; 80% recover well; 20% residual weakness; 5% mortality if ventilator unavailable

Property

Guillain-Barré Syndrome

Values

  • 65+ yr (early-onset possible at 40s)
  • Insidious (months to years)
  • Slowly progressive; years to decade+
  • Irreversible dementia; memory, cognition, personality
  • Poor; average 8–10 yrs from diagnosis; ultimately fatal; no cure

Property

Alzheimer's Disease

Columns

  • Disorder
  • Typical Age
  • Onset
  • Progression
  • Key Feature
  • Prognosis

Table Title

Degenerative & Neuro Disorders: Onset, Progression, Prognosis

Rows

Values

  • **Slow** (months to years)
  • **ACUTE** (hours to days)

Property

ONSET

Values

  • **Steadily progressive**
  • **Rapidly fluctuating** (worsens and improves)

Property

PROGRESSION

Values

  • **IRREVERSIBLE** (chronic, degenerative)
  • **REVERSIBLE** if underlying cause is identified and treated

Property

REVERSIBILITY

Values

  • Alert (early); drowsy/apathetic (late)
  • **Fluctuates: alert then confused then alert again**

Property

Consciousness/Alertness

Values

  • Intact early; declines with disease
  • **Markedly impaired** from onset

Property

Attention

Values

  • Relatively preserved early
  • **Severely disrupted** (sundowning, insomnia)

Property

Sleep-Wake Cycle

Values

  • Neurodegeneration (Alzheimer's, Parkinson's, etc.)
  • **Identifiable medical cause**: infection, drugs, hypoxia, metabolic, withdrawal, pain, etc.

Property

Cause

Values

  • N/A
  • **CINAHAS**: CNS infection, Intoxication, Nutrition, Anesthesia/Analgesia, Hypoxia, Alcohol withdrawal, Sepsis

Property

Common Causes (Delirium)

Values

  • Supportive (cholinesterase inhibitors, behavioral); No cure
  • **Treat underlying cause** (antibiotics for infection, discontinue drug, restore oxygenation, etc.)

Property

TREATMENT

Columns

  • Feature
  • Dementia
  • Delirium

Table Title

Dementia vs. Delirium (MUST-KNOW FOR NLE)

Rows

Values

  • Stabilizes neuronal membrane
  • Therapeutic level 10–20 mcg/mL; IV slowly ≤50 mg/min in NS only
  • Gingival hyperplasia, nystagmus, ataxia, hirsutism, rash
  • High drug interactions; teach oral hygiene; monitor for hypotension with IV

Property

Phenytoin (Dilantin)

Values

  • Modulates synaptic transmission
  • Renal function; behavioral changes
  • Irritability, agitation, behavioral, dizziness
  • Fewer drug interactions; no protein binding; preferred in renal failure

Property

Levetiracetam (Keppra)

Values

  • GABA enhancement
  • LFTs, platelet count, ammonia level
  • Hepatotoxicity, thrombocytopenia, tremor, weight gain, pancreatitis
  • Risk of hepatotoxicity (especially in young children); monitor CBC, LFTs

Property

Valproic Acid (Depakote)

Values

  • Blocks Na+ channels
  • CBC (agranulocytosis risk), hyponatremia, LFTs
  • Diplopia, ataxia, rash (SJS risk), hyponatremia, agranulocytosis
  • Autoinduction (induces own metabolism); monitor Na+ and CBC closely

Property

Carbamazepine (Tegretol)

Values

  • Blocks Na+ and Ca++ channels
  • Rash (SJS risk), LFTs
  • Stevens-Johnson syndrome (serious rash), headache, insomnia
  • **SJS risk**: teach patient to report any rash immediately; slow titration reduces risk

Property

Lamotrigine (Lamictal)

Values

  • GABA enhancement
  • Respiratory function, oversedation
  • Respiratory depression, sedation, dependence, tolerance
  • First-line for acute seizure/status epilepticus; short-acting; watch for respiratory depression

Property

Benzodiazepines (Lorazepam, Diazepam)

Columns

  • Drug
  • Mechanism
  • Key Monitoring
  • Side Effects
  • Notes

Table Title

Antiseizure Drugs: At-a-Glance

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