You're halfway through your shift when the charge nurse taps your shoulder. He was oriented x3 an hour ago. In real terms, "Bed 3 — Mr. Henderson. Now he's calling his wife by his daughter's name, and his left grip is weaker.
Your stomach drops. Not because you don't know what to do. But because you know exactly how fast things can change.
Neurologic assessment isn't a checkbox. Practically speaking, it's a conversation with the nervous system — and the nervous system doesn't lie. But it also doesn't speak in complete sentences. You have to listen in patterns, trends, and subtle shifts that show up long before a patient codes Most people skip this — try not to..
What Is Neurologic Function Assessment
At its core, it's the systematic evaluation of how well a patient's nervous system is doing its job. On the flip side, that means level of consciousness, cranial nerves, motor strength, sensation, reflexes, coordination, and gait. But in practice? Here's the thing — it's watching a patient try to button their shirt and noticing they only use one hand. It's catching the slight drift in an arm that was steady yesterday. It's the difference between "he's sleepy" and "he's obtunded" — and knowing why that distinction matters Not complicated — just consistent..
For practical nurses, this assessment happens at the bedside, in real time, often without a neurologist in the building. The trend-setter. You're the first line. The one who notices the change before it becomes a crisis.
The Components You Actually Use Daily
Level of consciousness — not just "alert" or "unresponsive." The Glasgow Coma Scale gives you numbers, but the trend gives you the story. A GCS of 14 that was 15 two hours ago? That's a red flag. A GCS of 10 that's been 10 for six hours? Different conversation.
Pupils — size, shape, equality, reactivity. A blown pupil on the side of a headache is a herniation sign until proven otherwise. But don't forget: fixed and dilated can also mean atropine eye drops, or an old cataract surgery. Context changes everything Simple, but easy to overlook..
Motor function — strength, symmetry, drift, pronator drift, spontaneous movement. The 0–5 scale is fine for documentation. But at the bedside? You're feeling for equality. You're watching for the arm that slowly floats down when the patient closes their eyes.
Sensation — light touch, sharp/dull, temperature, proprioception. Most of the time you're checking "can you feel this?" on both sides. But when something's off, you map it. Dermatomes matter when you're hunting a spinal level.
Reflexes — deep tendon reflexes, plantar response. Hyperreflexia with clonus? Upper motor neuron. Absent reflexes with flaccidity? Lower motor neuron or peripheral nerve. The plantar reflex — Babinski — is the one that makes students nervous. Upgoing toe in an adult = pathology. Period.
Why It Matters / Why People Care
Neurologic changes are the canary in the coal mine for so many conditions. Increased intracranial pressure. Stroke. In practice, sepsis. Metabolic derangements. In practice, medication toxicity. Hypoxia. The brain is greedy — it wants oxygen and glucose now — and it throws a fit when it doesn't get them And that's really what it comes down to..
Miss a subtle change, and you miss the window for intervention. Catch it early, and you might stop a herniation, reverse a hypoglycemic coma, or get a stroke patient to CT within the thrombolytic window The details matter here..
Here's what most people miss: the baseline is everything. You can't identify an alteration if you don't know what "normal" looks like for this patient. The 85-year-old with baseline dementia who's suddenly agitated? That's not "sundowning." That's a UTI, a subdural, a new stroke — until proven otherwise Worth keeping that in mind. Which is the point..
And the documentation? Here's the thing — the next shift. On the flip side, it's not for the chart. Which means the provider who reads your note at 3 a. "Neuro checks q1h" means nothing if the checks are "A&O x3, moves all extremities" every single time. It's for the next nurse. and decides whether to order a stat head CT. m. *Compared to what?
How It Works — The Real-World Approach
You don't run a full neurologic exam every hour. You tailor it. But you never skip the essentials.
The Hourly Neuro Check (What Actually Happens)
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Wake the patient. Gently. Call their name. Touch their shoulder. If they don't rouse, escalate stimulation — trapezius pinch, supraorbital pressure. Document how they responded. "Opens eyes to voice" hits different than "opens eyes to painful stimuli."
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Ask orientation questions. Person, place, time, situation. But mix it up. "What's your wife's name?" "What month is it?" "Why are you in the hospital?" Same questions every hour = memorized answers. Change the questions. Test the function, not the script.
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Check pupils. Penlight. Direct and consensual response. Size in millimeters. Shape. Equality. Do this every time — even if the patient is asleep. Wake them. It takes 15 seconds.
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Motor check. Grip strength — both hands at once. "Squeeze my fingers hard, don't let go." Plantar flexion/dorsiflexion — "Push down like a gas pedal, pull up toward your nose." Watch for drift. Pronator drift: arms outstretched, palms up, eyes closed. Count to 20. The arm that pronates and drifts down? That's the side with the corticospinal tract lesion.
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Sensation spot-check. Light touch on the face, both arms, both legs. "Same on both sides?" If they hesitate, test sharp/dull The details matter here..
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Vital signs — specifically blood pressure and heart rate. Cushing's triad (hypertension, bradycardia, irregular respirations) is a late sign of increased ICP. But the trend of rising systolic and dropping pulse? That's your early warning Simple as that..
The Focused Assessment (When Something's Wrong)
Patient complains of sudden headache? New weakness? Family says "he's not right"?
Now you go deeper.
Cranial nerves — not all 12 every time. Target the complaint. Facial asymmetry? CN VII. Double vision? CN III, IV, VI. Difficulty swallowing? CN IX, X. But always, always check pupils (II, III) and extraocular movements (III, IV, VI) together.
Cerebellar function — finger-to-nose, heel-to-shin, rapid alternating movements. Intention tremor? Dysmetria? That's cerebellar. Wide-based gait? Could be cerebellar, could be sensory ataxia, could be fear of falling. Watch them walk. With and without assistance.
Meningeal signs — nuchal rigidity, Brudzinski's, Kernig's. If you're thinking meningitis or subarachnoid hemorrhage. But remember: absent meningeal signs don't rule it out, especially in immunocompromised or elderly patients Most people skip this — try not to..
Deep tendon reflexes — biceps, triceps, brachioradialis, patellar, Achilles. Grade 0–4. Look for asymmetry. Clonus — more than 3 beats is pathologic.
Beyond the Exam: What to Do With What You Find
A neurological exam without action is just a conversation. Here's how to turn findings into decisions.
Know your red flags.
- Unequal pupils with decreased consciousness → stat head CT, call neurosurgery.
- Sudden onset of dense hemiparesis → door-to-needle time matters. Every minute is a million neurons.
- Cushing's triad → this patient is herniating. Elevate the head of the bed, hyperventilate if intubated, mannitol or hypertonic saline per protocol, and call for help now.
- New seizure with focal features → structural lesion until proven otherwise.
- Papilledema on fundoscopy → increased ICP. Do NOT lumbar puncture without imaging first.
When to call for help — and when to call loudly.
You don't need a neurology consult for every headache. But if the neuro exam changes during your shift, that's not a "maybe.Think about it: if the exam was normal at 0700 and the patient can't move their right arm at 1400, you have a new deficit. In practice, say that clearly. Consider this: document the baseline. " That's a call. Use the terms. "Right-sided pronator drift with hyperreflexia in the upper extremity" communicates more than "he doesn't seem right That's the part that actually makes a difference..
Imaging thresholds.
Not every patient needs a CT. But consider it when:
- Age over 65 with new neurological complaint
- Anticoagulation use
- Onset is sudden or thunderclap
- Headache with any focal deficit
- Decreasing level of consciousness
- Seizure without prior history
If the CT is clear but you still suspect posterior fossa pathology — cerebellar stroke, for instance — that's where MRI comes in. CT misses the posterior fossa. Know this. Don't let a normal CT give you false reassurance when the exam tells a different story Small thing, real impact. That alone is useful..
Documentation: the exam is only as good as the note.
"Neuro exam grossly intact" is the most dangerous sentence in medicine. It means someone didn't look carefully. Still, write what you found — and what you didn't find. "Pupils equal, round, reactive to light. Worth adding: no pronator drift. Sensation intact to light touch in all extremities." That's a normal exam worth writing down. And if you repeat the exam two hours later and it's the same, write that too. Trends matter more than snapshots.
The Bigger Picture
Neurological assessment isn't a checklist you complete and file away. In real terms, it's a language — a way of translating what a patient's brain is doing into actionable information. Now, every exam you perform builds a picture. One exam gives you a snapshot. Serial exams give you a movie. And in neurology, the movie tells the story.
The patient who was "fine" at 0600 and can't name objects at 1000? That's a stroke unfolding in real time. The patient whose pupils were equal at shift change and are now blown and fixed? That's herniation in progress. You won't catch these moments if you only look once.
So look again. Look with purpose. Look carefully. The nervous system doesn't give you second chances — and neither do you get to give your patients Easy to understand, harder to ignore..
Trust the exam. On top of that, trust the trend. And when something doesn't feel right — when the numbers don't match the picture — trust that instinct. It's usually right.
