π Key Information Summary
- A systematic neurological examination follows a consistent order: inspection β cranial nerves β motor β sensory β coordination β gait β higher cortical functions to avoid missing subtle findings.
- Neurological history is the single most important part of the assessment β the history alone lateralises and localises the lesion in the majority of cases before any examination is performed.
- Key history domains include headache (SOCRATES, thunderclap, red flags), weakness (distribution, onset, progression), seizures (focality, aura, postictal state), dizziness/vertigo, speech disturbance, visual symptoms, sphincter dysfunction, gait, and memory/cognition.
- Cranial nerves IβXII are examined systematically; fundoscopy is essential for papilloedema assessment and forms part of every complete neurological examination.
- Upper motor neurone (UMN) signs include increased tone (spasticity), hyperreflexia, upgoing plantars (Babinski positive), clonus, and an extensor pattern of weakness.
- Lower motor neurone (LMN) signs include decreased tone, hyporeflexia/areflexia, fasciculation, muscle wasting, and a segmental or nerve-root pattern of weakness.
- Motor power is graded using the Medical Research Council (MRC) scale 0β5; always compare sides and document systematically.
- Sensory examination maps light touch, pin-prick (spinothalamic), vibration, and joint-position sense (dorsal columns); a sensory level suggests myelopathy.
- Cerebellar signs β dysdiadochokinesia, intention tremor, past-pointing, nystagmus, and ataxic gait β suggest ipsilateral cerebellar or vestibulocerebellar pathology.
- Romberg test differentiates sensory ataxia (positive β falls with eyes closed) from cerebellar ataxia (positive with eyes open and closed).
- Higher cortical functions screening includes speech (fluency, comprehension, repetition, naming), orientation, memory (registration and recall), attention, and visuospatial function.
- Gait assessment β observe walking, heel-to-toe (tandem), turning, and toe/heel walking; characteristic patterns include hemiplegic, parkinsonian, ataxic, steppage, and waddling gaits.
- Red-flag findings requiring urgent neuroimaging or specialist referral include: new papilloedema, progressive unilateral weakness, saddle anaesthesia with sphincter dysfunction, acute speech disturbance, and thunderclap headache.
Introduction & Australian Context
Neurological conditions account for a substantial burden of disease in Australia. According to the Australian Institute of Health and Welfare (AIHW), diseases of the nervous system contribute significantly to years lived with disability, with stroke, dementia, epilepsy, migraine, and multiple sclerosis among the most prevalent chronic neurological diagnoses. An estimated 441,000 Australians live with stroke aftermath, over 400,000 with dementia, and approximately 250,000 with epilepsy.
A comprehensive neurological history and systematic examination remain the cornerstone of clinical neurology. Neuroimaging and electrophysiology are adjuncts that complement β but never replace β a careful bedside assessment. In the Australian primary-care setting, a methodical neurological examination allows the general practitioner to localise a lesion (cortex, brainstem, spinal cord, nerve root, peripheral nerve, neuromuscular junction, muscle), formulate a differential diagnosis, determine urgency of referral, and identify red flags mandating same-day hospital assessment.
This article provides a step-by-step guide to performing a complete neurological examination in the Australian clinical setting, covering neurological history, cranial nerves IβXII, motor system, sensory system, cerebellar function, higher cortical functions, and gait analysis. It is written in Australian English and references Australian guidelines and PBS-listed medications where relevant.
Neurological History
The neurological history is the most powerful localising tool in clinical neurology. In many cases, the history alone β before a single examination manoeuvre β will identify the likely anatomical level of the lesion and narrow the differential diagnosis substantially. Allocate adequate time; do not rush.
Presenting Complaint Domains
Past Medical, Drug, Family & Social History
- Past medical history: Previous stroke/TIA, epilepsy, head injury (with loss of consciousness), neurosurgery, meningitis/encephalitis, autoimmune conditions, malignancy (brain metastases), diabetes (neuropathy), hypertension (hypertensive encephalopathy).
- Medications: Anticoagulants/antiplatelets (haemorrhage risk), antipsychotics (movement disorders, NMS), aminoglycosides (vestibulotoxicity), phenytoin (cerebellar atrophy), opioids (myoclonus), lithium (tremor, toxicity).
- Family history: Epilepsy, migraine, Huntington disease, Charcot-Marie-Tooth, muscular dystrophies, hereditary neuropathies, familial Alzheimer disease.
- Social history: Alcohol (Wernicke-Korsakoff, cerebellar degeneration, peripheral neuropathy), recreational drugs (stroke, seizures), occupation (driving assessment requirements β Austroads guidelines), travel (neurocysticercosis, cerebral malaria, TB meningitis).
Cranial Nerve Examination (CN I β CN XII)
The cranial nerve examination is performed in numerical order from CN I (olfactory) through CN XII (hypoglossal). Each nerve is tested systematically with both qualitative and quantitative assessment where applicable.
CN I β Olfactory Nerve
- Test each nostril separately with a familiar non-irritant odour (e.g., coffee, vanilla) while occluding the opposite nostril.
- Loss of smell (anosmia) may indicate frontal lobe pathology (meningioma, traumatic shearing of olfactory fibres from anterior skull-base fracture), nasal mucosal disease, or early Parkinson disease / Lewy body dementia.
- Document as: "CN I β intact bilaterally / anosmia right / hyposmia left."
CN II β Optic Nerve
- Visual acuity: Snellen chart at 6 metres (with distance correction). Document each eye separately: "R 6/6, L 6/9." If patient cannot read the chart, test finger counting β hand movements β light perception.
- Visual fields: Confrontation testing β sit 1 metre opposite, test each eye individually. Ask patient to fix on your nose. Move fingers or a red pin in each quadrant. Map any scotoma or field defect (homonymous hemianopia, bitemporal hemianopia, quadrantanopia).
- Pupillary reactions: Test direct and consensual responses using a penlight. Then perform the relative afferent pupillary defect (RAPD / Marcus Gunn pupil) test using the swinging-torch test. A RAPD indicates optic nerve pathology (optic neuritis, ischaemic optic neuropathy).
- Fundoscopy: Examine in a darkened room. Assess optic disc margins (blurred = papilloedema or papillitis), cup-to-disc ratio, retinal vessels (AV nipping in hypertension), macula, and look for haemorrhages, exudates, or cotton-wool spots. Normal cup-to-disc ratio is <0.5.
CN III, IV, VI β Oculomotor, Trochlear, Abducens
- Inspect: Ptosis (CN III palsy, Horner syndrome, myasthenia gravis), pupil size and symmetry, position of rest (outward and down = CN III palsy; hypertropia = CN IV palsy).
- Eye movements: Ask patient to follow your finger/pen in an "H" pattern. Test all six cardinal directions of gaze. Note any diplopia and in which direction it is worst.
- Pupil assessment: CN III carries parasympathetic fibres for pupillary constriction. A CN III palsy with a dilated pupil (blown pupil) is a compressive lesion (posterior communicating artery aneurysm β emergency) until proven otherwise. A CN III palsy with a normal pupil is likely ischaemic (diabetes, hypertension).
- Internuclear ophthalmoplegia (INO): Failure of adduction on the affected side with nystagmus of the abducting eye β suggests medial longitudinal fasciculus lesion (multiple sclerosis in young patients, stroke in older patients).
CN V β Trigeminal Nerve
- Sensory: Test light touch and pin-prick in all three divisions β V1 (ophthalmic β forehead), V2 (maxillary β cheek), V3 (mandibular β jaw). Compare sides.
- Motor (muscles of mastication): Ask patient to clench jaw β palpate masseter and temporalis bulk. Ask patient to open mouth against resistance β lateral pterygoid; deviation of jaw to the weak side indicates ipsilateral CN V motor weakness.
- Reflexes: Corneal reflex (afferent CN V1, efferent CN VII) β lightly touch cornea with cotton wisp from the side. Jaw jerk (afferent and efferent CN V3) β place finger on chin, tap with reflex hammer; brisk jaw jerk indicates bilateral UMN lesion above the pons.
CN VII β Facial Nerve
- Inspect: Facial asymmetry at rest. Ask patient to raise eyebrows, close eyes tightly ("don't let me open them"), puff out cheeks, show teeth, smile.
- UMN vs LMN distinction:
| Feature | UMN (Central) Lesion | LMN (Peripheral) Lesion |
|---|---|---|
| Forehead sparing | Yes β forehead receives bilateral UMN input | No β entire ipsilateral face affected |
| Common causes | Stroke, tumour | Bell palsy, Ramsay Hunt (VZV), parotid tumour, sarcoidosis |
| Other signs | Often with hemiparesis, dysarthria | Hyperacusis (nerve to stapedius), loss of taste (chorda tympani), ear pain |
CN VIII β Vestibulocochlear Nerve
- Hearing: Finger rub test (each ear) β Rinne test (tuning fork on mastoid then near ear canal β air conduction > bone conduction = normal = positive Rinne) β Weber test (tuning fork on vertex β lateralises to affected ear in conductive loss; lateralises to unaffected ear in sensorineural loss).
- Vestibular: Dix-Hallpike manoeuvre if vertigo suspected (tests for benign paroxysmal positional vertigo β BPPV). Head impulse test for vestibulo-ocular reflex (peripheral vs central vertigo). Test for nystagmus β peripheral (horizontal, unidirectional, suppressed by fixation) vs central (vertical, bidirectional, not suppressed by fixation).
CN IX & X β Glossopharyngeal & Vagus Nerves
- Speech quality: Hoarseness (recurrent laryngeal nerve / CN X), nasal speech (palatal weakness), wet/gurgling voice (secretion pooling).
- Palatal movement: Ask patient to say "Ahhh" β observe soft palate. Uvula deviates away from the side of the lesion (CN X palsy). In bilateral vagal palsy, palate does not elevate at all.
- Gag reflex: Afferent CN IX, efferent CN X β touch posterior pharyngeal wall (each side). Absent gag may indicate LMN bulbar pathology. Note: a unilateral absent gag is common and may be a normal variant.
- Swallowing: Offer a sip of water β coughing or nasal regurgitation suggests dysphagia. If concerned, do NOT proceed to full oral intake; refer for formal swallow assessment (speech pathology).
CN XI β Accessory Nerve
- Sternocleidomastoid (SCM): Ask patient to turn head against resistance β tests contralateral SCM (CN XI). Weakness = head turns away from the weak side.
- Trapezius: Ask patient to shrug shoulders against resistance. Observe for scapular winging and compare bulk of upper trapezius bilaterally.
CN XII β Hypoglossal Nerve
- Inspect tongue at rest: Fasciculations (LMN lesion β motor neurone disease), wasting (LMN), deviation (tongue deviates towards the side of an LMN lesion).
- Tongue protrusion: Ask patient to stick tongue out β deviation towards the weak side (LMN) or away from the weak side if there is a contralateral UMN lesion (the "wrong" side pattern because the hypoglossal nucleus is supplied by the contralateral corticobulbar tract for protrusion).
- Tongue movements: Rapid side-to-side movements. Slow, clumsy movements suggest UMN (pseudobulbar) involvement.
Motor System Examination
The motor system is examined in a systematic sequence: inspection β tone β power β reflexes β plantar responses. Test each component in the upper limbs, then the lower limbs. Always compare sides.
Inspection
- Bulk: Look for muscle wasting (LMN lesion, disuse, myopathy) and fasciculations (LMN β particularly motor neurone disease). Compare muscle groups bilaterally β deltoids, thenar/hypothenar eminences, quadriceps, calves.
- Involuntary movements: Tremor (resting = parkinsonian; postural/action = essential tremor, anxiety, thyrotoxicosis), chorea (Huntington disease, Sydenham chorea), athetosis, dystonia, myoclonus, tics.
Tone
- Upper limbs: With patient relaxed, passively rotate the wrist, flex/extend the elbow. Assess for spasticity (velocity-dependent increase β "clasp-knife" β UMN), rigidity (constant increase, "lead-pipe" or "cogwheel" β extrapyramidal), or hypotonia (LMN, cerebellar).
- Lower limbs: Lift the knee from the bed (supine) and let it drop β the normal heel glides smoothly down. Roll the leg inward and outward. Test ankle clonus if spasticity is suspected β briskly dorsiflex the ankle. Sustained clonus (>3 beats) is pathological.
Power β MRC Grading
| Grade | Description | Documentation |
|---|---|---|
| 0 | No contraction | 0/5 |
| 1 | Flicker/trace of contraction | 1/5 |
| 2 | Active movement with gravity eliminated | 2/5 |
| 3 | Active movement against gravity | 3/5 |
| 4 | Active movement against gravity and some resistance | 4/5 |
| 5 | Normal power | 5/5 |
Key Muscle Testing β Upper Limbs
Key Muscle Testing β Lower Limbs
Deep Tendon Reflexes (DTRs)
Ensure relaxation, use a consistent brisk tap, and compare sides. Grade on a 0β4+ scale.
| Reflex | Root Level | Technique |
|---|---|---|
| Biceps | C5, C6 | Tap your thumb placed over biceps tendon at the antecubital fossa |
| Brachioradialis | C5, C6 | Tap the radius just above the wrist |
| Triceps | C7, C8 | Tap the triceps tendon just above the olecranon |
| Knee (patellar) | L3, L4 | Tap the patellar tendon with leg hanging relaxed over edge of bed |
| Ankle (Achilles) | S1, S2 | Dorsiflex the foot slightly and tap the Achilles tendon |
Grading: 0 = absent; 1+ = diminished; 2+ = normal; 3+ = brisk (may be normal in a brisk person); 4+ = clonus.
Plantar Responses
- Stroke the lateral border of the sole from heel to the base of the little toe, then curve medially across the metatarsal heads, using a blunt object (orange stick or key β not a sharp object, as pain causes withdrawal).
- Normal (flexor): Toes flex downward.
- Abnormal (extensor β Babinski sign): Great toe dorsiflexes (extends) and smaller toes fan out. This indicates a UMN lesion (corticospinal tract disruption).
- If no response, try stroking the shin or dorsum of the foot. Document: "Plantars downgoing bilaterally" or "Right extensor, left flexor."
UMN vs LMN Patterns β Distinguishing Features
- Increased tone (spasticity β clasp-knife)
- Hyperreflexia (with clonus)
- Extensor plantar response (Babinski +)
- Weakness in extensor pattern (arm extensors weaker than flexors)
- Minimal wasting early (disuse atrophy later)
- No fasciculations
- Decreased tone (flaccidity)
- Hyporeflexia or areflexia
- Flexor (normal) or absent plantar response
- Weakness in myotomal/nerve distribution
- Muscle wasting (early and prominent)
- Fasciculations present
Cerebellar Signs
- Dysdiadochokinesia: Inability to perform rapid alternating movements (e.g., rapid pronationβsupination of hand on thigh). Test both sides and compare.
- Finger-nose-finger test: Ask patient to alternately touch their nose and your finger (held 30β40 cm away). Cerebellar lesion produces intention tremor β tremor worsens as finger approaches target. Also look for past-pointing.
- Heel-shin test: Patient places one heel on the opposite knee and slides it down the shin. Ataxia of heel-shin movement = ipsilateral cerebellar hemispheric lesion.
- Truncal ataxia: Unsteadiness when sitting or standing with a wide-based gait β midline cerebellar (vermis) lesion.
- Rebound phenomenon: Patient flexes elbow against your resistance, which you suddenly release β patient's forearm overshoots (loss of check reflex).
- Nystagmus: Coarse, horizontal nystagmus with the fast component towards the side of a cerebellar hemispheric lesion.
- Speech: Scanning/staccato dysarthria (cerebellar speech).
Sensory System, Higher Cortical Functions & Gait
Sensory System Examination
Sensory testing relies on patient cooperation and is inherently subjective. Always test with the patient's eyes closed. Compare sides and proximal vs distal. Test in a dermatomal pattern to detect a sensory level (suggesting myelopathy).
Modalities Tested
Romberg Test
- Ask patient to stand with feet together and eyes open β ensure steady. Then ask patient to close eyes for 30 seconds while you stand close to catch them.
- Positive Romberg (falls with eyes closed): Sensory ataxia β loss of proprioceptive/vestibular input. Patient relies on vision to compensate; removing visual input reveals ataxia. Causes: B12 deficiency, tabes dorsalis, large-fibre neuropathy.
- Negative Romberg but unsteady with eyes open: Cerebellar ataxia β cerebellum does not rely on vision, so removing it does not worsen balance (may actually be slightly better because visual vertigo is removed).
Sensory Patterns β Localising Value
| Pattern | Description | Suggests |
|---|---|---|
| Glove-and-stocking | Bilateral, symmetrical, distal > proximal | Peripheral neuropathy (diabetes, alcohol, B12) |
| Dermatomal | Follows a single or adjacent dermatomes | Radiculopathy, herpes zoster |
| Sensory level | Everything below a certain spinal level | Myelopathy (transverse myelitis, cord compression, syringomyelia) |
| Hemisensory | Entire contralateral body | Thalamic stroke, cortical lesion |
| Dissociated (pin-prick loss, vibration preserved or vice versa) | Separate tracts affected | Syringomyelia (cape-like pin-prick loss, vibration intact), Brown-SΓ©quard |
Higher Cortical Functions
Screening of higher cortical functions should be performed in any patient with suspected cognitive decline, speech difficulty, or focal cortical signs. Formal cognitive testing tools (MoCA, MMSE) complement the bedside assessment but do not replace it.
Gait Assessment
Gait is the final component of the neurological examination and integrates motor, sensory, cerebellar, and extrapyramidal function. Observe the patient walking, turning, and performing specific gait manoeuvres.
| Gait Type | Characteristics | Cause |
|---|---|---|
| Hemiplegic | Circumduction of affected leg, stiff extended arm, foot scuffs | Stroke, UMN lesion |
| Parkinsonian | Shuffling, short steps (marche Γ petits pas), reduced arm swing, festination (accelerating), en bloc turning, stooped posture | Parkinson disease, drug-induced parkinsonism |
| Ataxic (cerebellar) | Wide-based, staggering, irregular, unable to tandem walk | Cerebellar lesion, alcohol intoxication |
| Sensory ataxic | Wide-based, heavy stomping, worsens with eyes closed (positive Romberg) | B12 deficiency, large-fibre neuropathy |
| Steppage | High stepping to clear dropped foot, slapping foot down | Common peroneal nerve palsy, L5 radiculopathy, peripheral neuropathy |
| Waddling | Trendelenburg sign β trunk sways side to side due to hip abductor weakness | Muscular dystrophy, proximal myopathy, hip dysplasia |
| Antalgic | Limping, shortened stance phase on painful side | Hip/knee pathology (not neurological) |
Additional Gait Manoeuvres
- Tandem gait (heel-to-toe): Walk in a straight line placing heel directly in front of toes. Unsteadiness suggests cerebellar or proprioceptive dysfunction.
- Toe walking: Tests S1 (gastrocnemius/soleus) β bilateral inability suggests myopathy or bilateral S1 radiculopathy/neuropathy.
- Heel walking: Tests L5 (tibialis anterior β dorsiflexion) β bilateral inability suggests bilateral L5 pathology or peripheral neuropathy.
- Hop on each foot: Integrates coordination and power β cerebellar patients cannot hop on the ipsilateral foot.
- Pull test (postural stability): Stand behind patient, pull shoulders briskly backwards. Normal response is a corrective step. Parkinson disease patients may take many small steps backwards (retropulsion) or fail to correct.
Special Populations
Paediatric Neurological Examination
Geriatric Neurological Examination
Pregnancy
Renal Impairment
Hepatic Impairment
Immunocompromised
Aboriginal and Torres Strait Islander Health
Quick Reference β Neurological Examination Checklist
Use this checklist to ensure all components of the neurological examination have been performed and documented.
π References
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