Guide — Neurology
Neurological Assessment Fundamentals
A systematic approach to the bedside neurological assessment — level of consciousness, orientation, pupils, motor strength, sensation, speech, cranial nerves, and GCS scoring — with documentation standards and NCLEX pearls.
11 min read · Neurology
Educational use only. Neurological assessment findings must be interpreted in clinical context. Any acute change in neurological status is a medical emergency — notify the provider immediately. This material supports nursing education and exam review. It is not medical advice and is not a substitute for clinical judgment, institutional policy, or medical direction. Always follow facility protocols and current provider orders.
Why Neuro Assessment Matters
The neurological exam is the nurse's primary tool for detecting acute changes in brain function. Unlike vital signs that fluctuate gradually, neurological changes can indicate catastrophic events — stroke, herniation, seizure, or septic encephalopathy — that require immediate escalation. Early detection is time-critical and outcome-defining.
Bedside nursing neurological assessment focuses on the most clinically relevant and rapidly observable components. A full neurological exam is performed by a provider; the bedside nursing assessment focuses on the components most sensitive to acute change.
Level of Consciousness (LOC)
LOC is the most sensitive early indicator of neurological deterioration.
| LOC Level | Description | Clinical Appearance |
|---|---|---|
| Alert | Fully awake, aware, and responsive | Eyes open spontaneously; follows commands; oriented |
| Drowsy / Lethargic | Sleepy but easily arousable; may drift back to sleep | Opens eyes to voice; responds appropriately but slowly |
| Obtunded | Reduced alertness; responds to stimuli but not fully aware | Opens eyes to loud voice or touch; minimal spontaneous movement |
| Stuporous | Deep sleep; arousable only with vigorous stimulation | Opens eyes to pain; responds minimally; cannot follow commands |
| Comatose | Unarousable; no purposeful response to any stimulation | Does not open eyes; no verbal response; only reflex motor responses |
Avoid vague documentation such as “confused.” Document the specific stimulus used and the exact response obtained.
Orientation
| Domain | Assessment Question | Normal Response | Clinical Note |
|---|---|---|---|
| Person | What is your name? | States full name | First lost in severe impairment — last preserved |
| Place | Where are you right now? | Names hospital, city, or unit | Often impaired with delirium, dementia, or acute encephalopathy |
| Time | What is today's date/year? | Correct date within a day or two | Most commonly impaired; institutionalized patients often lose time orientation |
| Situation / Event | What happened / why are you here? | Explains reason for admission | Highest cognitive demand — impaired early in encephalopathy |
Document as: “Oriented to person and place; disoriented to time and situation.” Do not simply chart “A&Ox3.”
Pupillary Assessment
Pupils assess brainstem integrity — CN II (afferent) and CN III (efferent) of the pupillary light reflex.
PERRL Acronym
- •P — Pupils
- •E — Equal
- •R — Round
- •R — Reactive to
- •L — Light
Assess
- •Size: 2–6 mm normal
- •Shape: round vs irregular
- •Equality: symmetric vs asymmetric
- •Reactivity: brisk, sluggish, or nonreactive
- •Direct and consensual reflex
| Finding | Possible Cause | Urgency |
|---|---|---|
| Bilateral pinpoint (1–2 mm) | Opioid toxicity, pontine injury | Urgent — assess respirations |
| Unilateral dilated and fixed | CN III compression (uncal herniation) | CRITICAL — notify provider immediately |
| Bilateral dilated and fixed | Anoxic brain injury, herniation, atropine | CRITICAL — cardiac arrest protocol may be indicated |
| Unequal pupils (anisocoria) | Unilateral CN III palsy, Horner syndrome, or normal variant | Urgent if new — compare to baseline |
| Sluggish reactivity | Increased ICP, metabolic encephalopathy, sedation | Monitor and report if worsening |
Motor Strength Grading
Assess all four extremities. Compare right vs. left and upper vs. lower limbs.
| Grade | Description | Clinical Appearance |
|---|---|---|
| 5/5 | Normal strength | Full movement against full resistance |
| 4/5 | Active movement against some resistance | Moves against gravity + partial resistance |
| 3/5 | Active movement against gravity only | Lifts extremity against gravity; no added resistance |
| 2/5 | Active movement only with gravity eliminated | Moves on flat surface; cannot lift against gravity |
| 1/5 | Trace movement — muscle flicker only | Visible or palpable contraction without movement |
| 0/5 | No movement or contraction | Complete paralysis |
Drift Test (Pronator Drift)
Ask the patient to extend both arms forward with palms up and eyes closed for 10 seconds. Downward drift or pronation of one arm indicates contralateral upper motor neuron weakness — a sensitive early sign of stroke or other corticospinal tract pathology.
Sensation
Assess sensation in all four extremities using a standardized approach. Compare distal to proximal and right vs. left:
- Light touch: Cotton ball or fingertip to each extremity — patient reports sensation
- Pain/sharp sensation: Safety pin or tongue depressor broken end — “sharp or dull?”
- Proprioception: Move the patient's toe up or down — patient identifies position with eyes closed
- Vibration: 128 Hz tuning fork on bony prominence — patients reports when vibration stops
Deficits: unilateral loss = contralateral cortical/spinal lesion; bilateral distal loss (“stocking-glove”) = peripheral neuropathy (e.g., diabetes).
Speech Assessment
| Finding | Description | Likely Location |
|---|---|---|
| Fluent speech | Normal rate, rhythm, grammar, and content | Normal |
| Broca aphasia | Non-fluent, effortful speech; comprehension intact; patient frustrated | Left frontal lobe (Broca area) |
| Wernicke aphasia | Fluent but meaningless word salad; comprehension impaired | Left temporal lobe (Wernicke area) |
| Global aphasia | Both expression and comprehension severely impaired | Large left MCA territory stroke |
| Dysarthria | Motor speech disorder — slurred, mumbled words; content is correct | Cerebellar, brainstem, CN VII/IX/X/XII pathology |
| Aphonia | No voice — patient mouths words or whispers | CN X (vocal cord palsy), severe dysphonia |
Key distinction: dysarthria = motor problem (correct words, slurred); aphasia = language problem (wrong words or no words). Both are stroke signs — report immediately.
GCS Connection
The Glasgow Coma Scale (GCS) provides an objective, reproducible numeric score (3–15) for LOC. It is used to establish baseline, track trends, and communicate neurological status across care teams.
Eye Opening (max 4)
- 4 = Spontaneous
- 3 = To voice
- 2 = To pain
- 1 = None
Verbal (max 5)
- 5 = Oriented
- 4 = Confused
- 3 = Words only
- 2 = Sounds only
- 1 = None
Motor (max 6)
- 6 = Obeys commands
- 5 = Localizes pain
- 4 = Withdraws
- 3 = Abnormal flexion
- 2 = Extension
- 1 = None
Score Interpretation
Cranial Nerve Overview
Bedside neuro-check targets most clinically relevant cranial nerves. Full CN testing is provider-performed.
| CN | Name | Quick Bedside Test | Key Concern If Abnormal |
|---|---|---|---|
| CN II | Optic | Visual acuity; visual fields to confrontation | Stroke, ICP, optic neuritis |
| CN III | Oculomotor | Pupil reactivity; ability to look up/down/medially; eyelid droop | Uncal herniation if unilateral fixed/dilated |
| CN V | Trigeminal | Facial sensation; corneal reflex | Brainstem stroke, trigeminal neuralgia |
| CN VII | Facial | Smile, forehead wrinkle, eye closure | Bell palsy, stroke (lower face weakness only in central lesion) |
| CN IX/X | Glossopharyngeal / Vagus | Gag reflex; swallowing; voice quality | Dysphagia, aspiration risk |
| CN XI | Accessory | Shoulder shrug against resistance | Neck/shoulder weakness in cervical lesion |
| CN XII | Hypoglossal | Tongue protrusion — should be midline | Deviation toward the weak side (away from a cortical stroke lesion); toward lesion side in peripheral CN XII palsy |
Documentation Standards
Document specifically — not subjectively:
- LOC: “Alert, opens eyes spontaneously, follows commands” — not just “alert”
- Orientation: “Oriented to person and place; states year is 2023 (incorrect)”
- Pupils: “PERRL 3mm; brisk consensual response bilaterally”
- Motor: “UE strength 5/5 bilaterally; LE 5/5 right, 3/5 left”
- GCS: Document each component separately — “GCS 13: E4V4M5”
- Compare to previous assessment — highlight any changes
- Time stamp all assessments
Report Immediately If:
- Any acute change in LOC or orientation from baseline
- New unilateral or bilateral pupillary abnormality
- New focal motor weakness or asymmetry
- New aphasia or sudden severe dysarthria
- GCS drop of ≥2 points from baseline
- Sudden severe headache (“worst headache of my life”)
NCLEX Pearls
- ✦LOC is the most sensitive indicator of neurological change — any shift requires immediate reassessment and provider notification.
- ✦Unilateral fixed and dilated pupil = CN III compression from uncal herniation until proven otherwise. This is a CRITICAL emergency.
- ✦Pronator drift is a sensitive early sign of upper motor neuron (corticospinal) lesion — use it to detect subtle stroke.
- ✦Broca aphasia: cannot speak fluently but understands. Wernicke aphasia: speaks fluently but words are meaningless. Both are stroke signs.
- ✦GCS ≤8 = severe brain injury = consider airway protection. The number to memorize: GCS 8 = intubate.
- ✦Tongue deviates TOWARD the side of the lesion (hypoglossal nerve palsy) — opposite to arm/leg weakness in stroke.
- ✦Bilateral pinpoint pupils in a drowsy patient = opioid toxicity or pontine hemorrhage — check respirations immediately.
Related Resources
Standards & sources
Fact-checked Jun 21, 2026This page is written to align with American Heart Association / American Stroke Association (AHA/ASA) · American Association of Neuroscience Nurses (AANN). It is an educational summary, not a citation of any single document — always verify specific doses, values, and protocols against current guidelines and your facility policy. How we source content →