CLINICAL REF

Neurological Assessment

Cranial nerves · Peripheral nervous system · Causes · Red flags

Full Neurological Assessment — Framework
A complete neuro exam has six domains: consciousness, higher cortical function, cranial nerves, motor system, sensory system, and coordination/gait. In prehospital practice these are often abbreviated — but knowing the full framework lets you know what you're abbreviating and why.
STEP 1 Consciousness & Orientation
1
AVPU / GCS — establish baseline. Note trajectory.
2
Orientation — Person, Place, Time, Event (PPTE)
3
Attention — serial 7s, MOYB, or days of week backwards
4
Memory — immediate recall (3 words), recent events
GCS Components
E1–4
Eyes: none→spontaneous
V1–5
Verbal: none→orientated
M1–6
Motor: none→obeys
3/15
Minimum / coma
8/15
Intubation threshold
15/15
Normal
STEP 2 Higher Cortical Function
1
Speech — fluency, comprehension, repetition, naming. Note dysarthria vs dysphasia.
2
Praxis — follow complex commands ("wave goodbye")
3
Neglect — visual and sensory inattention (bilateral stimuli)
4
FAST-ED / NIHSS — structured stroke screening
Dysphasia vs Dysarthria
Dysarthria = words correct, articulation poor (motor). Dysphasia = language content wrong (cortical). Critical distinction — dysphasia = cortical lesion until proved otherwise.
STEP 3 Motor System
  • Tone — spasticity (UMN), flaccidity (LMN), rigidity (extrapyramidal)
  • Power — MRC scale 0–5, compare sides, proximal vs distal
  • Pronator drift — arms out 10s, eyes closed. Drift = contralateral UMN lesion
  • Coordination — finger-nose, heel-shin, rapid alternating (cerebellar)
  • Gait — observe if able: hemiplegic scissor, ataxic, steppage, festinating
MRC Power Scale
0
No contraction
1
Flicker only
2
Movement, gravity eliminated
3
Against gravity
4
Against resistance (reduced)
5
Normal
STEP 4 Sensory System
  • Light touch — cotton wool, ask patient to say "yes" when felt
  • Pain/temperature — neuro tip or cold metal (same spinothalamic tract)
  • Vibration — 128Hz tuning fork on bony prominences (dorsal column)
  • Proprioception — toes up/down with eyes closed (dorsal column)
  • Two-point discrimination — cortical sensation if needed
Key Patterns
  • Glove/stocking = peripheral neuropathy
  • Dermatome pattern = nerve root / cord lesion
  • Hemibody = contralateral thalamus/cortex
  • Dissociated loss = Brown-Séquard or syrinx
STEP 5 Reflexes
ReflexRootTechnique↑ (brisk)↓/absent
BicepsC5–C6Finger on tendon, tap fingerUMN above C5LMN C5/6, peripheral neuropathy
TricepsC6–C7Direct tap on tendonUMN above C6LMN C7, radiculopathy
SupinatorC5–C6Tap radial styloidUMNC6 lesion
Knee (patellar)L3–L4Leg relaxed, tap patellar tendonUMN; anxietyLMN, peripheral neuropathy, diabetes
Ankle (Achilles)S1–S2Tap Achilles, foot in dorsiflexionUMNLMN S1, DM, hypothyroid
Plantar (Babinski)L5–S1Stroke lateral soleUPGOING = UMN pathologyNormal = downgoing (flexor)
Cranial Nerves — Anatomy & Function
OH OH OH TO TOUCH AND FEEL VERY GREEN VEGETABLES AH HEAVEN
I · II · III · IV · V · VI · VII · VIII · IX · X · XI · XII
Type: SOME SAY MARRY MONEY BUT MY BROTHER SAYS BIG BRAINS MATTER MORE
S=Sensory M=Motor B=Both — I:S · II:S · III:M · IV:M · V:B · VI:M · VII:B · VIII:S · IX:B · X:B · XI:M · XII:M
Nerve Name Type Function Lesion gives… Causes
CN I Olfactory Sensory Smell Anosmia (unilateral or bilateral) Head injury, anterior fossa meningioma, COVID-19, zinc deficiency
CN II Optic Sensory Vision; afferent pupillary reflex Visual field defects, RAPD, reduced acuity, colour vision loss MS (optic neuritis), glaucoma, retinal detachment, ischaemic optic neuropathy, raised ICP
CN III Oculomotor Motor Eye: SR, IR, MR, IO muscles; eyelid levator; pupil constriction (parasympathetic) Ptosis, eye "down and out", mydriasis (fixed dilated pupil) if surgical; spared pupil if medical (DM) Posterior communicating artery aneurysm, uncal herniation, DM, MS, cavernous sinus
CN IV Trochlear Motor Superior oblique — intorts and depresses eye Diplopia worse looking down (e.g. stairs); head tilt to opposite side Head injury (most common), DM, MS, raised ICP, cavernous sinus
CN V Trigeminal Both Sensation: face (V1 ophthalmic, V2 maxillary, V3 mandibular). Motor: jaw (masseter, temporalis, pterygoids) Facial numbness in trigeminal distribution; jaw deviation to weak side; absent corneal reflex Trigeminal neuralgia, MS, acoustic neuroma, skull base tumour, cavernous sinus, herpes zoster
CN VI Abducens Motor Lateral rectus — abducts eye Failure of lateral gaze ipsilateral; convergent squint; horizontal diplopia Raised ICP (false localising), DM, MS, cavernous sinus thrombosis, Wernicke's, meningitis
CN VII Facial Both Motor: facial expression. Sensory: taste anterior 2/3 tongue, external ear sensation. Parasympathetic: lacrimal/salivary glands UMN: contralateral lower face spared (forehead). LMN: complete ipsilateral hemiface including forehead Bell's palsy (LMN), stroke (UMN), Ramsay Hunt (HZV), parotid tumour, cholesteatoma, Lyme disease, sarcoid, acoustic neuroma
CN VIII Vestibulocochlear Sensory Hearing (cochlear); balance (vestibular) Sensorineural deafness, tinnitus, vertigo, nystagmus Acoustic neuroma, Ménière's, ototoxic drugs (gentamicin, furosemide, cisplatin), noise damage, MS, meningitis
CN IX Glossopharyngeal Both Sensory: posterior 1/3 tongue taste, pharynx, afferent gag. Motor: stylopharyngeus, parotid (para) Loss of gag afferent, dysphagia, reduced taste posterior tongue; glossopharyngeal neuralgia Posterior fossa tumour, skull base fracture, carotid aneurysm, MS, meningitis
CN X Vagus Both Motor: pharynx/larynx (including vocal cords), efferent gag. Parasympathetic: heart/gut. Sensory: viscera, posterior pharynx Hoarse voice, bovine cough, nasal regurgitation, uvula deviates away, absent gag efferent, dysphonia, tachycardia if bilateral Posterior fossa/medullary lesion, lung apex tumour (recurrent laryngeal — L side), aortic aneurysm, thyroid surgery, PICA stroke
CN XI Accessory Motor Sternocleidomastoid (head rotation), upper trapezius (shoulder shrug) Weak shoulder shrug ipsilateral; weak head rotation away from lesion; winging of scapula if combined with CN XI Posterior fossa tumour, jugular foramen syndrome (IX, X, XI together), cervical lymph node biopsy, penetrating neck injury
CN XII Hypoglossal Motor Tongue movement (all intrinsic and most extrinsic muscles) LMN: tongue deviates toward lesion, wasting, fasciculations. UMN: deviates away, no wasting Motor neurone disease, skull base metastasis, neck dissection, posterior fossa tumour, vertebral artery aneurysm, stroke (medullary)
Prehospital priority: CN III palsy with fixed dilated pupil = posterior communicating artery aneurysm or transtentorial herniation until proved otherwise. This is a neurosurgical emergency. CN VII: always distinguish UMN (forehead sparing = stroke) from LMN (complete face = Bell's or other LMN cause).
How to Test Each Cranial Nerve
I — Olfactory
1
Ask about smell changes. One nostril at a time.
2
Use familiar non-pungent smell (coffee, peppermint). Not ammonia — stimulates trigeminal.
II — Optic
1
Acuity: Snellen chart / newspaper / count fingers
2
Fields: Confrontation — each eye separately, compare to yours. Four quadrants.
3
Pupils: Direct + consensual reflex. Swinging flashlight test for RAPD.
4
Fundoscopy: Papilloedema, disc pallor, haemorrhages
III · IV · VI — Eye Movements
1
Cover each eye. Any ptosis? Pupil asymmetry?
2
"Follow my finger" — H-pattern in both eyes. Pause at extremes. Ask about diplopia.
3
Nystagmus: fast phase direction = direction of nystagmus. Peripheral = horizontal/rotatory. Central = vertical/direction-changing.
4
Convergence: finger towards bridge of nose.
V — Trigeminal
1
Sensory: Light touch and pin each division (forehead/V1, cheek/V2, chin/V3) bilaterally
2
Corneal reflex: Touch cornea (not sclera) with wisp of cotton from side. Both eyes should blink.
3
Motor: "Clench jaw" — palpate masseter. Open mouth — jaw deviates toward weakness.
VII — Facial
1
Raise eyebrows — check forehead wrinkling symmetrically
2
Close eyes tightly — can you force them open? (frontalis/orbicularis oculi)
3
Show teeth / smile — nasolabial fold flattening?
4
Puff out cheeks. Note: forehead sparing = UMN lesion (stroke). Full loss = LMN (Bell's).
VIII — Vestibulocochlear
1
Whisper test each ear; finger rubbing near ear
2
Rinne: 512Hz fork — mastoid then in air. Air > bone = normal or SNHL. Bone > air = conductive
3
Weber: Fork on forehead midline. Lateralises to conductive loss / away from SNHL side
4
Nystagmus + Dix-Hallpike for BPPV
IX · X — Glossopharyngeal · Vagus
1
Listen to voice — hoarse (X), nasal (X), normal
2
"Aah" — uvula should rise in midline. Deviation = away from CN X lesion
3
Gag reflex — afferent IX, efferent X. Check both sides. Note: absent gag ≠ always pathological in adults.
4
Swallow water — timing, drooling, cough after
XI · XII — Accessory · Hypoglossal
1
XI: Shoulder shrug against resistance (trapezius) — note asymmetry
2
XI: Turn head against resistance (SCM turns head to opposite side)
3
XII: Protrude tongue — deviates toward LMN lesion. Check for wasting, fasciculations.
💡
Prehospital shortcut: In the acute setting prioritise II (pupils/acuity), III/IV/VI (eye movements, ptosis), V (corneal, sensation), VII (face), VIII (vertigo/nystagmus), IX/X (swallow/voice), XII (tongue). Full formal testing of I, IV, XI is rarely time-critical on scene.
Peripheral Nervous System Assessment
UPPER LIMB Key Nerve Roots & Nerves
NerveRootMotorSensoryTest
AxillaryC5–C6DeltoidRegimental badge areaArm abduction at shoulder
MusculocutaneousC5–C6Biceps, brachialisLateral forearmElbow flexion (supinated)
RadialC5–T1Triceps, extensorsDorsum of hand (1st web)Wrist/finger extension; "wrist drop"
MedianC6–T1Thenar eminence, FDS, FDP (lat.), pronatorsLateral 3½ fingers palm sideThumb opposition (LOAF); "Papal blessing"
UlnarC8–T1Intrinsics, hypothenar, FDP (med.)Medial 1½ fingersFinger abduction; Froment's sign; "claw hand"
Brachial Plexus Injuries
  • Erb's palsy (C5–C6) — "waiter's tip" — arm adducted, medially rotated, wrist flexed. Mechanism: shoulder dystocia, motorcycle crash.
  • Klumpke's (C8–T1) — claw hand + Horner's syndrome. Mechanism: upward arm traction.
  • Total plexus — flail anaesthetic arm. High-velocity trauma.
LOWER LIMB Key Nerve Roots & Nerves
NerveRootMotorSensoryTest
FemoralL2–L4QuadricepsAnterior thigh, medial leg (saphenous)Knee extension; knee jerk
ObturatorL2–L4Hip adductorsMedial thighHip adduction against resistance
SciaticL4–S3Hamstrings + tibial + common peronealPosterior leg, footKnee flexion; tests below
Common peronealL4–S2Ankle/toe dorsiflexion, eversionDorsum of foot, lateral leg"Foot drop"; Tinel's at fibular head
TibialL4–S3Calf, plantar flexion, toe flexionSole of footAnkle plantarflexion; ankle jerk
Root Levels — Quick Reference
  • L1–L2 — hip flexion (iliopsoas)
  • L3–L4 — knee extension (quads); knee jerk L3/4
  • L4–L5 — ankle dorsiflexion; foot drop if damaged
  • L5–S1 — great toe extension (extensor hallucis longus — L5 sentinel)
  • S1–S2 — ankle plantarflexion; ankle jerk S1
  • S3–S5 — bladder/bowel/perineum
DERMATOMES Key Landmarks
Upper Limb
  • C4 — cape of shoulders
  • C5 — lateral shoulder/arm
  • C6 — thumb and index finger
  • C7 — middle finger
  • C8 — little and ring finger
  • T1 — medial forearm
  • T4 — nipple line
  • T10 — umbilicus
  • T12/L1 — inguinal ligament
Lower Limb
  • L1 — groin
  • L2 — anterior thigh
  • L3 — medial knee
  • L4 — medial leg / medial foot
  • L5 — dorsum of foot / big toe
  • S1 — lateral foot / sole
  • S2 — posterior thigh
  • S3-5 — saddle area / perineum
Clinical Correlates
  • T10 numbness → thoracic cord, T10 disc
  • L4/L5 disc → L5 dermatomal pain (lateral calf, dorsum foot)
  • L5/S1 disc → S1 dermatomal pain (posterior calf, sole, heel)
  • Saddle anaesthesia → cauda equina. Emergency.
  • Brown-Séquard → ipsilateral motor/proprioception loss, contralateral pain/temp loss
Cauda Equina — DO NOT MISS: Saddle anaesthesia (S3–S5) + bladder/bowel dysfunction + bilateral leg weakness/sensory loss = cauda equina syndrome until proven otherwise. URGENT MRI. Ask about urinary retention, incontinence, reduced perianal sensation in ALL patients with low back pain and any leg neurology.
Neurological Patterns — Localising the Lesion
UMN vs LMN Upper vs Lower Motor Neurone
FeatureUMN (Central)LMN (Peripheral)
ToneIncreased (spasticity / clasp-knife)Decreased (flaccid)
PowerReduced — pyramidal pattern (extensors UL, flexors LL weak)Reduced — myotomal pattern
ReflexesBrisk / hyperreflexicDiminished / absent
BabinskiExtensor (upgoing)Flexor (normal)
WastingDisuse only (late, mild)Early, marked
FasciculationsAbsentPresent
LocationBrain, brainstem, spinal cordAnterior horn, nerve root, plexus, peripheral nerve
PATTERNS By Distribution
Hemiplegia
Ipsilateral CN + contralateral motor/sensory = brainstem. All contralateral = cortex/internal capsule/cord (C levels)
Paraplegia
Bilateral legs = spinal cord ≥T1. Check level with sensory testing. Ask about sphincters.
Quadriplegia
C1–C4: diaphragm involved (C3–C5 = phrenic). UMN below level; may have LMN signs at level.
Monoplegia
Single limb — cortex (small lesion), nerve root, or peripheral nerve. Distinguish by distribution.
Glove/stocking
Length-dependent peripheral neuropathy. Longest fibres affected first = feet before hands.
Proximal weakness
Myopathy or neuromuscular junction (MG). Difficulty rising from chair, climbing stairs.
Distal weakness
Peripheral neuropathy, MND, Charcot-Marie-Tooth
Crossed deficits
Ipsilateral face + contralateral body = BRAINSTEM lesion (Wallenberg, lateral medullary)
SENSORY PATTERNS Anatomical Localisation
Hemibody loss
Contralateral thalamus, internal capsule, parietal cortex. VPL nucleus thalamus = face + limbs same level.
Dissociated loss
Vibration/proprioception (dorsal column) vs pain/temp (spinothalamic) separated = cord lesion. Syrinx, Brown-Séquard.
Dermatomal
Single stripe or band = nerve root (disc prolapse, shingles, radiculopathy)
Peripheral nerve
Matches anatomical territory: carpal tunnel = median digits; ulnar = little/ring + medial palm
Stocking/glove
Peripheral neuropathy — symmetrical, distal, length-dependent
Cord level
Bilateral sensory loss below a level + motor signs. Urgently find level with pin prick — sacral segments last affected (sacral sparing = incomplete).
Saddle anaesthesia
S3–S5 loss. Cauda equina. Emergency MRI.
GAIT PATTERNS
  • Hemiplegic (circumduction) — UMN stroke. Stiff extended leg swings out. Arm flexed/adducted.
  • Scissor gait — bilateral UMN (cerebral palsy, cord). Hips adducted, cross midline.
  • Steppage (high-stepping) — foot drop (L4/5, common peroneal). Lifts knee high to clear toe.
  • Antalgic — pain minimisation. Short stance phase on affected side.
  • Ataxic (cerebellar/sensory) — wide-based, unsteady. Cerebellar: worse with eyes open. Sensory: worse with eyes closed (Romberg +ve).
  • Festinating (Parkinsonian) — small shuffling steps, stooped, accelerates forward, reduced arm swing, en-bloc turning.
  • Waddling — proximal muscle weakness / hip girdle myopathy. Trendelenburg.
  • Apraxic — "walking on ice", feet don't leave floor. Frontal lobe (NPH, vascular dementia).
Causes of Neurological Presentations
Sudden Onset
VASCULAR
  • Ischaemic stroke (thrombotic/embolic)
  • Haemorrhagic stroke (ICH, SAH)
  • TIA (resolves <24h)
  • Vertebral/carotid dissection
  • Venous sinus thrombosis
  • Hypertensive encephalopathy / PRES
  • Vasculitis
TRAUMA
  • Extradural haematoma (arterial — lucid interval)
  • Subdural haematoma (acute/chronic)
  • Diffuse axonal injury
  • Contusion / intracerebral haemorrhage
  • Spinal cord injury
  • Peripheral nerve injury (traction, laceration)
SEIZURE
  • Epilepsy (idiopathic, structural)
  • Hypoglycaemia — always exclude
  • Hyponatraemia
  • Hypo/hypercalcaemia
  • Drug/alcohol withdrawal
  • Eclampsia
  • Non-epileptic attack disorder (NEAD)
TOXIC/METABOLIC
  • Hypoglycaemia / hyperglycaemia (HHS, DKA)
  • Hyponatraemia / hypernatraemia
  • Hepatic encephalopathy
  • Uraemia
  • CO poisoning
  • Drug toxicity / overdose
  • Wernicke's encephalopathy (B1 deficiency)
Subacute / Progressive
INFECTIVE
  • Bacterial meningitis
  • Viral encephalitis (HSV, EBV, CMV)
  • Brain abscess
  • Tuberculoma / TB meningitis
  • Neurosyphilis
  • Lyme neuroborreliosis
  • HIV-related (toxoplasma, PML, crypto)
  • COVID-19 neurological complications
INFLAMMATORY / IMMUNE
  • Multiple sclerosis (relapsing-remitting, progressive)
  • Neuromyelitis optica spectrum
  • Guillain-Barré syndrome (ascending, post-infective)
  • CIDP
  • Vasculitis (SLE, PAN, giant cell)
  • Myasthenia gravis
  • Anti-NMDAR encephalitis
  • Sarcoidosis
NEOPLASTIC
  • Primary tumours (glioma, meningioma, lymphoma)
  • Cerebral metastases (lung, breast, melanoma, renal, colon)
  • Leptomeningeal carcinomatosis
  • Spinal cord compression (metastatic)
  • Paraneoplastic (SCLC, anti-Hu, anti-Yo)
  • Acoustic neuroma (CN VIII)
  • Pituitary tumour (bitemporal hemianopia)
DEGENERATIVE
  • Motor neurone disease (ALS, PBP, PMA)
  • Parkinson's disease and Parkinson-plus syndromes
  • Alzheimer's / vascular dementia / DLB / FTD
  • Huntington's disease
  • Hereditary spastic paraplegia
  • Friedreich's ataxia / spinocerebellar ataxias
  • MSA / PSP / CBS
METABOLIC / NUTRITIONAL
  • Subacute combined degeneration (B12 deficiency)
  • Wernicke–Korsakoff (thiamine B1)
  • Diabetic peripheral neuropathy
  • Hypothyroidism (neuropathy, cerebellar, myopathy)
  • Wilson's disease
  • Porphyria
  • Chronic renal/liver failure
STRUCTURAL / COMPRESSIVE
  • Cervical myelopathy (spondylosis)
  • Disc prolapse (radiculopathy)
  • Spinal stenosis (neurogenic claudication)
  • Chiari malformation
  • Normal pressure hydrocephalus
  • Syringomyelia
  • Carpal tunnel / cubital tunnel
Peripheral Neuropathy — Causes by Type
POLYNEUROPATHY Symmetrical Glove/Stocking
  • Metabolic: Diabetes (most common in UK), uraemia, hypothyroid, liver disease
  • Nutritional: B12, B1 (thiamine), B6 excess, folate deficiency
  • Toxic: Alcohol, chemotherapy (vincristine, cisplatin), metronidazole, INH, amiodarone, statins (myopathy)
  • Inflammatory: GBS, CIDP, vasculitis
  • Infective: HIV, leprosy, Lyme, CMV
  • Paraneoplastic: Sensory > motor, anti-Hu
  • Hereditary: Charcot-Marie-Tooth (CMT)
  • Idiopathic: ~30% of cases
MONONEUROPATHY Single Nerve
  • Median: Carpal tunnel (commonest), pronator teres entrapment
  • Ulnar: Cubital tunnel (elbow), Guyon's canal (wrist)
  • Radial: Saturday night palsy (axilla compression), posterior interosseous nerve
  • Common peroneal: Fibular head compression (plaster, leg crossing, weight loss)
  • Lateral cutaneous thigh: Meralgia paraesthetica (inguinal ligament, obesity/pregnancy)
  • Diabetic mononeuropathy: Any nerve, vasa nervorum ischaemia
Red Flags — Do Not Miss
🚨
These presentations demand urgent action. Time-critical. Convey immediately.
THUNDERCLAP HEADACHE
  • Sudden onset, maximal at onset ("worst ever")
  • SAH until proved otherwise (CT then LP)
  • Also: CVT, RCVS, pituitary apoplexy, vertebral dissection
  • Even if normal neuro exam
MENINGISM
  • Neck stiffness, photophobia, phonophobia
  • Kernig's / Brudzinski's signs
  • Non-blanching rash = meningococcal
  • Do NOT delay abx for LP if bacterial meningitis suspected
CAUDA EQUINA
  • Saddle anaesthesia (S3–S5)
  • Bilateral leg weakness
  • Urinary retention or incontinence
  • Faecal incontinence
  • Reduced anal tone on PR
  • Urgent MRI same day
CORD COMPRESSION
  • Known malignancy + back pain + neurology = cord compression until proved otherwise
  • Bilateral weakness below a level
  • Sensory level
  • Bladder/bowel involvement
  • High-dose dexamethasone + urgent MRI
STROKE / FAST
  • F — facial droop
  • A — arm drift/weakness
  • S — speech: dysarthria, dysphasia, slurred
  • T — time: call immediately, note last known well
  • Eyes: gaze deviation, hemianopia, RAPD
  • Posterior: vertigo + ataxia + crossed signs + dysphagia
CN III PALSY + HEADACHE
  • Fixed dilated pupil + ptosis + eye down/out
  • PComm aneurysm = neurosurgical emergency
  • If associated with headache: treat as aneurysm
  • Note: DM causes "pupil-sparing" CN III (medical, less urgent but still needs imaging)
GBS — ASCENDING PARALYSIS
  • Post-infective (1–3 weeks after GI/URI)
  • Ascending flaccid areflexic weakness
  • Autonomic instability
  • Respiratory compromise = ITU
  • Sniff test / VC if available: if <20ml/kg = ventilatory support
TRANSTENTORIAL HERNIATION
  • Rapidly declining GCS
  • Unilateral/bilateral fixed dilated pupils
  • Cushing's triad: hypertension, bradycardia, irregular breathing
  • Decerebrate/decorticate posturing
  • Pre-terminal — expedite transport
Prehospital Neuro Assessment Checklist
ON SCENE
1
GCS, BM, SpO2, temp, pupils (PERLA — size, reactivity, equality)
2
FAST screen — face/arms/speech. Time of onset / last known well.
3
Focal neurology — limb power, drift, sensation
4
Cranial nerve screen — eye movements, facial symmetry, swallow, tongue
5
Red flag check: headache character, meningism, saddle symptoms
6
Pre-alerts: stroke bypass / major trauma / neurosurgical
HANDOVER STRUCTURE
1
Onset: Sudden/gradual, time, activity at onset, progression
2
History: PMH, medications (anticoagulants), preceding illness/trauma
3
Findings: GCS (trend), pupils, FAST, focal deficits found
4
Working diagnosis / differential: Stroke? SAH? Metabolic? Trauma?
5
Last known well: Critical for thrombolysis / thrombectomy window