Neurological Examination for Physiotherapists: Reflexes, Sensation, Strength, and Clinical Reasoning
A practical, step-by-step guide to neurological assessment, clinical interpretation, documentation, patient safety, and recognizing signs that require urgent medical referral.
Introduction
A neurological examination is an essential part of physiotherapy practice. It helps clinicians identify impairments involving the brain, spinal cord, nerve roots, peripheral nerves, and neuromuscular system. A structured examination can help explain a patient's pain, weakness, altered sensation, impaired balance, reduced coordination, or changes in functional mobility.
However, a neurological examination is more than a series of physical tests. Its real value lies in connecting the patient's history with objective findings, recognizing patterns of neurological dysfunction, and deciding whether physiotherapy is appropriate, whether further investigation is needed, or whether urgent medical assessment is required.
Four core components form the foundation of a focused neurological examination:
Reflexes: Assessing the integrity of reflex pathways and identifying possible upper or lower motor neuron involvement.
Sensation: Examining sensory pathways to identify altered perception, sensory loss, or nerve distribution patterns.
Muscle strength: Identifying weakness, asymmetry, and patterns that may suggest central or peripheral neurological involvement.
Clinical reasoning: Integrating findings with symptoms, functional limitations, safety considerations, and the need for referral.
This blog provides a systematic approach that physiotherapists can adapt to outpatient, inpatient, rehabilitation, and musculoskeletal settings. The examination should always be tailored to the patient's presentation, clinical setting, scope of practice, and level of risk.
1. Preparing for the neurological examination
Before performing individual tests, establish the patient's baseline condition and determine whether a focused examination is sufficient or a broader neurological assessment is required.
Step 1: Take a focused history
Ask about:
Onset: sudden, gradual, or following trauma.
Symptom progression: stable, improving, fluctuating, or worsening.
Pain: location, severity, radiation, and aggravating or relieving factors.
Sensory symptoms: numbness, tingling, burning, altered temperature perception, or loss of sensation.
Motor symptoms: weakness, foot drop, reduced grip, difficulty rising from a chair, or frequent dropping of objects.
Functional changes: walking difficulty, falls, hand clumsiness, and reduced coordination.
Associated symptoms: visual disturbance, speech changes, dizziness, headache, or changes in bladder or bowel function.
Relevant history: neurological conditions, diabetes, cancer, recent infection, surgery, anticoagulant use, and recent trauma.
Ask the patient to describe what has changed and when it started. A new, progressive deficit is generally more concerning than a long-standing, stable symptom.
Step 2: Observe before testing
Observe the patient's alertness, speech, facial symmetry, posture, spontaneous movements, gait, and ability to follow instructions. Note any visible muscle wasting, involuntary movements, tremor, or abnormal limb positioning.
Do not begin a routine examination if the history or initial observation suggests a time-critical neurological emergency. Arrange emergency assessment according to local protocols.
Step 3: Explain and obtain consent
Explain each procedure, obtain consent, and ensure appropriate positioning, privacy, and exposure of the area being examined. Ask about pain, hypersensitivity, and any difficulty understanding or performing the requested movements.
Compare both sides whenever appropriate, while remembering that bilateral or symmetrical findings can still be abnormal.
2. Assessing deep tendon reflexes
Reflex testing helps evaluate the integrity of sensory input, spinal cord segments, motor output, and descending neurological influences. Reflexes should be interpreted alongside muscle strength, sensation, tone, and functional findings rather than in isolation.
Common deep tendon reflexes
1. Patellar reflex (L2–L4, predominantly L4)
Nerve: femoral nerve
Tests the quadriceps reflex response and contributes information about the L2–L4 spinal segments.
2. Achilles reflex (S1–S2, predominantly S1)
Nerve: tibial nerve
Evaluates the plantar-flexor reflex response and is particularly useful when investigating possible S1 nerve root involvement.
3. Biceps reflex (C5–C6, predominantly C5)
Nerve: musculocutaneous nerve
Assesses the reflex response associated with elbow flexion.
4. Triceps reflex (C7–C8, predominantly C7)
Nerve: radial nerve
Evaluates the reflex response associated with elbow extension.
Other useful reflexes include the brachioradialis reflex (C5–C6, predominantly C6) and, where clinically indicated, additional reflexes that help localize neurological dysfunction.
Step-by-step reflex examination
1
Position the patient
Support the limb comfortably and ensure the relevant muscle is relaxed. For example, let the lower legs hang freely over the edge of a plinth when testing the patellar reflex.
2
Locate the tendon
Identify the tendon by palpation. For the patellar reflex, locate the patellar tendon below the patella; for the Achilles reflex, locate the tendon above its calcaneal insertion.
3
Apply a controlled tap
Use a reflex hammer to deliver a brief, appropriately directed strike to the tendon. Avoid excessive force and maintain a comfortable, relaxed position.
4
Observe the response
Watch and feel for the expected muscle contraction or joint movement. If the response is difficult to obtain, check positioning and relaxation before repeating the test.
5
Compare sides and grade
Compare corresponding reflexes on the right and left, record the response, and relate it to the patient's other examination findings.
Reflex grading
A commonly used clinical scale is:
| Grade | Interpretation |
|---|---|
| 0 | Absent |
| 1+ | Diminished |
| 2+ | Average or expected response |
| 3+ | Brisk response; may be normal in some individuals |
| 4+ | Very brisk, often with clonus |
Interpret the scale in context. A 3+ reflex is not automatically pathological, and an absent reflex is not sufficient on its own to establish a peripheral nerve or nerve root lesion.
Clinical reasoning: Reduced or absent reflexes may occur with lower motor neuron dysfunction, peripheral neuropathy, nerve root lesions, or other conditions affecting the reflex arc. Brisk reflexes, especially when accompanied by clonus, spasticity, or pathological reflexes, can suggest upper motor neuron involvement.
Clinical example: Reduced Achilles reflex
A patient reports pain radiating from the lower back into the posterior calf, tingling along the lateral foot, and difficulty performing repeated single-leg heel raises.
Examination reveals a reduced left Achilles reflex and reduced plantar-flexion performance compared with the right.
These findings raise suspicion of left S1 nerve root involvement, but they do not confirm the diagnosis. The physiotherapist should assess sensation, strength, symptom distribution, and other relevant neurological signs. Progressive weakness or other serious warning signs warrant urgent escalation.
3. Assessing sensation
Sensory examination evaluates how effectively the patient detects and interprets different stimuli. The findings can help identify possible peripheral nerve, nerve root, spinal cord, or brain involvement.
The examination should be guided by the patient's symptoms and the suspected neurological distribution.
Types of sensation
| Sensory modality | What it assesses | Common bedside method |
|---|---|---|
| Light touch | Detection of gentle skin contact | Cotton wool or a suitable light-touch stimulus |
| Pinprick | Ability to distinguish sharp from blunt | A single-use, purpose-designed neurotip |
| Temperature | Recognition of warm and cool stimuli | Safe, purpose-designed temperature stimuli when indicated |
| Vibration | Perception of vibratory sensation | A 128 Hz tuning fork |
| Joint position sense | Awareness of the position of a body part | Small movements of a finger or toe |
| Cortical sensory function | Higher-level interpretation of sensory input | Stereognosis, graphesthesia, or extinction testing when indicated |
Not every patient requires every modality. Choose tests based on the history, findings, and clinical question.
Step-by-step sensory examination
Step 1: Explain the task
Ask the patient to close their eyes, if appropriate, and explain how they should respond to each stimulus. Demonstrate the procedure first on an unaffected or neutral area.
Step 2: Test light touch
Apply a gentle, consistent stimulus to selected areas. Ask whether the patient feels it and whether it feels the same on both sides. Avoid leading questions.
Step 3: Assess pinprick when indicated
Use a purpose-designed disposable instrument to compare sharp and blunt sensations. Avoid broken skin, infected areas, and excessive pressure. Do not use needles or improvised sharp objects.
Step 4: Test vibration and joint position sense
Apply a vibrating tuning fork to an appropriate bony prominence. For joint position sense, hold the sides of the distal joint and move it slightly up or down, asking the patient to identify the direction with their eyes closed.
Step 5: Map abnormalities
Compare both sides and examine adjacent areas to establish the distribution of any sensory change. Document the modality, location, severity, and consistency of the finding.
Understanding sensory patterns
Sensory changes may follow different anatomical patterns:
Dermatomal pattern: Symptoms correspond broadly to a spinal nerve root distribution.
Peripheral nerve pattern: Sensory changes fit the territory supplied by an individual nerve.
Length-dependent pattern: Distal, often symmetrical sensory loss may suggest a peripheral polyneuropathy.
Central pattern: Sensory changes may involve a limb, one side of the body, or a pattern associated with spinal cord or brain pathways.
These are clinical clues rather than definitive diagnostic rules. Dermatomes overlap, individual anatomy varies, and pain can make sensory responses inconsistent.
Clinical example: Numbness in the hand
A patient reports intermittent tingling in the thumb, index finger, and middle finger, particularly at night.
The physiotherapist assesses light touch in the median nerve territory, then examines relevant myotomes, reflexes, symptom provocation, and the neck where indicated.
A median nerve distribution may support consideration of median neuropathy, including carpal tunnel syndrome, but sensory distribution alone cannot distinguish all possible causes. Neck-related nerve root dysfunction and other neurological conditions may need consideration.
Clinical pearl: Sensory testing is most useful when the clinician records exactly where the sensation is altered, which modality is affected, and how the pattern relates to the patient's symptoms.
4. Assessing muscle strength
Strength testing helps identify weakness, asymmetry, and patterns that may indicate a central neurological lesion, nerve root involvement, peripheral nerve dysfunction, or a musculoskeletal impairment.
It is important to distinguish true neurological weakness from pain inhibition, fatigue, fear of movement, restricted joint movement, and poor comprehension.
Step-by-step manual muscle testing
Step 1: Select the relevant movement
Choose movements according to the history and suspected neurological level. Include proximal and distal muscles when needed.
Step 2: Position and stabilize
Position the patient to allow the target movement and stabilize adjacent segments to minimize substitution.
Step 3: Ask for active movement
Observe whether the patient completes the movement through the available range against gravity. Note pain, compensatory movements, tremor, and fatigue.
Step 4: Apply resistance when appropriate
If the patient completes the movement against gravity, apply gradual resistance in the opposite direction while stabilizing the limb. Do not force a painful or unsafe movement.
Step 5: Grade and compare
Record the strength grade, compare sides, and relate findings to functional tasks such as walking, stair climbing, gripping, or transfers.
Medical Research Council (MRC) muscle strength scale
| Grade | Description |
|---|---|
| 0/5 | No visible or palpable contraction |
| 1/5 | Flicker or trace contraction without joint movement |
| 2/5 | Movement through the available range with gravity minimized |
| 3/5 | Movement through the available range against gravity |
| 4/5 | Movement against gravity and some resistance |
| 5/5 | Expected strength against resistance |
Grades 4 and 5 cover a broad range of force production. Record important side-to-side differences and consider quantitative dynamometry when appropriate and available. MRC grading can also be influenced by examiner technique, pain, effort, and positioning.
Myotomes and useful test movements
A myotome is a group of muscles predominantly associated with a spinal nerve root. Because most muscles receive input from multiple roots, myotomal testing is not perfectly specific.
| Root level | Example movement | Functional relevance |
|---|---|---|
| C5 | Shoulder abduction | Raising the arm |
| C6 | Elbow flexion or wrist extension | Bringing the hand toward the face |
| C7 | Elbow extension | Pushing away |
| C8 | Finger flexion | Gripping objects |
| T1 | Finger abduction | Spreading the fingers |
| L2 | Hip flexion | Lifting the thigh |
| L3 | Knee extension | Straightening the knee |
| L4 | Ankle dorsiflexion | Lifting the foot |
| L5 | Great toe extension | Lifting the big toe |
| S1 | Ankle plantar flexion | Push-off during walking |
These movements are screening examples, not exclusive tests of individual nerve roots. Some root levels are better assessed with a combination of muscles and associated clinical findings.
Clinical example: Foot drop
A patient reports catching the toes on the ground and difficulty clearing the foot while walking.
Examination reveals reduced ankle dorsiflexion and great toe extension, with altered sensation over part of the dorsum of the foot.
Possible explanations include L5 nerve root involvement or a common fibular (peroneal) nerve lesion, among other causes. The clinician should assess the distribution of weakness, sensation, reflexes, relevant proximal muscle function, and symptom onset.
Important: New or rapidly progressive foot drop requires prompt medical assessment. If it occurs suddenly with facial weakness, speech changes, or other signs of stroke, activate emergency services immediately.
5. Integrating reflexes, sensation, and strength
The strongest clinical conclusions come from patterns across multiple tests rather than a single abnormal result.
| Finding pattern | Possible interpretation | Next clinical step |
|---|---|---|
| Weak plantar flexion, reduced Achilles reflex, sensory symptoms along the lateral foot | Possible S1 nerve root dysfunction | Complete the focused neurological examination and assess severity and progression |
| Weak ankle dorsiflexion and great toe extension, sensory change over the dorsum of the foot | Possible L5 root or fibular nerve involvement | Examine other relevant muscles and sensory territories to help localize the lesion |
| Brisk reflexes with increased tone and clonus | Possible upper motor neuron involvement | Screen for associated neurological signs and escalate appropriately |
| Symmetrical distal sensory loss with reduced ankle reflexes | Possible length-dependent peripheral neuropathy | Review medical history, balance, protective sensation, and referral needs |
| Progressive hand clumsiness, gait imbalance, and brisk lower-limb reflexes | Possible cervical spinal cord involvement | Arrange urgent medical assessment for suspected myelopathy |
These patterns guide hypotheses, not definitive diagnoses. Findings may overlap, multiple conditions can coexist, and normal findings do not exclude significant neurological disease.
6. Clinical reasoning: From examination findings to decisions
Clinical reasoning is the process of converting examination findings into a safe, evidence-informed plan. Physiotherapists should continually ask three questions:
Where might the problem be? Brain, spinal cord, nerve root, peripheral nerve, peripheral nerves more generally, or another system?
How serious is it? Is the presentation stable, progressive, acute, or potentially life-threatening?
What should happen next? Continue physiotherapy, modify the assessment, arrange routine medical review, or initiate urgent referral?
A practical clinical reasoning framework
1. History and symptom behavior
Onset · progression · distribution · associated symptoms
2. Focused neurological examination
Strength · reflexes · sensation · gait · coordination as indicated
3. Pattern recognition and risk assessment
Anatomical consistency · severity · progression · red flags
No urgent warning signs
Proceed with appropriate assessment, treatment planning, monitoring, and referral when indicated.
Urgent concern identified
Stop routine assessment or treatment and arrange the appropriate emergency or urgent medical response.
Case study: Is this a nerve root problem or a spinal cord problem?
A 58-year-old patient presents with neck discomfort, difficulty fastening buttons, and increasing unsteadiness when walking.
The physiotherapist finds reduced dexterity in both hands, brisk knee reflexes, and difficulty with tandem walking.
Clinical reasoning:
Bilateral hand dysfunction and gait disturbance raise concern for a central neurological process.
Brisk lower-limb reflexes may support upper motor neuron involvement.
The combination of hand clumsiness and gait changes is concerning for possible cervical myelopathy, although other diagnoses remain possible.
Management decision: Do not treat this as routine neck pain without further assessment. Arrange urgent medical evaluation for suspected spinal cord involvement. If the symptoms are rapidly worsening or accompanied by severe neurological deficits, emergency assessment is warranted.
This example illustrates why the pattern of findings matters more than any individual test.
7. Neurological examination documentation
Accurate documentation supports clinical decision-making, continuity of care, referral communication, and monitoring of changes over time.
A useful note includes:
Relevant subjective history and symptom onset.
Objective examination findings, including side and anatomical location.
Strength grades, reflex grades, and sensory modalities tested.
Relevant gait, balance, coordination, and functional observations.
Clinical interpretation, including uncertainty and alternative explanations.
Safety screening, advice given, referral decisions, and follow-up arrangements.
Example of a structured clinical note
Neurological Examination Record
Illustrative case · Suspected left S1 nerve root involvement
Subjective findings
Patient reports left-sided low back pain radiating into the posterior calf, with tingling along the lateral foot for 10 days. Reports difficulty with repeated heel raises. No reported bowel or bladder changes or saddle sensory symptoms at the time of assessment.
Objective findings
Strength: Left ankle plantar flexion 4/5; right 5/5. Interpretation limited by pain and reduced endurance.
Reflexes: Left Achilles 1+; right Achilles 2+. Patellar reflexes 2+ bilaterally.
Sensation: Reduced light-touch perception along part of the left lateral foot compared with the right.
Function: Reduced left single-leg heel-raise performance compared with the right.
Other findings: Record relevant gait, spinal cord screening, and additional neurological test results actually performed.
Clinical impression
Findings raise suspicion of left S1 nerve root involvement. The pattern is not diagnostic in isolation and requires correlation with the full examination and medical history.
Plan
Complete appropriate neurological and safety screening. Arrange medical review according to the severity and progression of deficits. Provide appropriate advice, monitor neurological changes, and document the agreed follow-up plan.
Copy reusable documentation template
Documentation best practices
Be objective. Write “left Achilles reflex 1+, right 2+” rather than “reflexes abnormal.”
Record what was tested. If sensation was tested only with light touch, do not document sensation as entirely normal across all modalities.
Describe change over time. Compare with previous assessments when available, especially when weakness or sensory loss is progressing.
Document uncertainty honestly. “Findings are consistent with possible L5 nerve root involvement” is more appropriate than stating a confirmed lesion without sufficient evidence.
Record escalation clearly. Include the concern identified, the advice provided, the clinician or service contacted when applicable, and the agreed next steps.
8. Safety considerations during examination
Neurological assessment requires attention to patient comfort, infection control, falls risk, and the possibility that testing could reveal a time-critical condition.
Before and during testing
Confirm the patient's identity, explain the examination, and obtain consent.
Follow hand hygiene and local infection-control procedures.
Use appropriate equipment and safe sensory-testing methods.
Support the patient during standing, balance, and gait tests, particularly if weakness or sensory loss is present.
Avoid unnecessary resistance, forceful movement, or provocative testing when serious pathology is suspected.
Modify testing for pain, fatigue, communication difficulties, cognitive impairment, or reduced ability to follow instructions.
Monitor for new pain, dizziness, distress, worsening weakness, or other unexpected changes.
Stop if the examination becomes unsafe or reveals signs that require urgent escalation.
Additional precautions
Reduced protective sensation: Check skin integrity and footwear where relevant, especially in patients with peripheral neuropathy or diabetes. Avoid thermal testing that risks burns.
Possible spinal cord compression: Avoid proceeding with routine exercise or manual treatment when progressive neurological deficits or other concerning features suggest cord involvement.
Suspected acute stroke: Do not delay emergency assessment to complete a full neurological examination.
Falls risk: Use appropriate assistance and equipment during mobility assessment. Do not ask a patient with substantial weakness or instability to perform unsupported single-leg or tandem tasks.
9. Urgent warning signs: When to stop and refer
Recognizing serious neurological presentations is one of the most important responsibilities in physiotherapy. Some warning signs require emergency medical assessment rather than routine follow-up.
Emergency assessment now
Activate local emergency services or follow the emergency pathway immediately.
1. Suspected stroke
Sudden facial droop, unilateral arm or leg weakness, speech difficulty, sudden visual disturbance, severe imbalance, or other abrupt focal neurological symptoms. Note the time the patient was last known to be well if possible, and do not delay emergency activation.
2. Possible cauda equina syndrome
New urinary retention or difficulty initiating urination, loss of awareness of bladder filling, new saddle or perineal sensory loss, new bowel dysfunction, or severe or progressive leg weakness in a concerning spinal presentation. Do not wait for every symptom to appear.
3. Rapidly progressive neurological deficit
Rapidly worsening weakness, new inability to walk, rapidly evolving bilateral neurological symptoms, or acute major loss of motor function.
4. Possible acute spinal cord compression or injury
Significant new limb weakness, sensory changes below a suspected spinal level, gait deterioration, or other signs of cord dysfunction—particularly after trauma or with suspected compression.
5. Sudden severe headache with neurological symptoms
A sudden, exceptionally severe headache, especially with neck stiffness, altered consciousness, collapse, vomiting, or focal neurological deficits, warrants emergency assessment.
Urgent medical review
Arrange prompt assessment according to the clinical severity and local referral pathway.
6. Suspected cervical myelopathy
Progressive hand clumsiness, new gait imbalance, limb stiffness, hyperreflexia, or other signs suggesting spinal cord dysfunction.
7. New or progressive focal weakness
New foot drop, deteriorating grip, worsening limb weakness, or an evolving neurological pattern, even without severe pain.
8. Possible neurological disease associated with systemic illness
New neurological symptoms in a patient with a history of cancer, immunosuppression, recent serious infection, or significant trauma may require urgent investigation, especially when accompanied by severe pain, fever, or progressive deficits.
Important: The absence of red flags does not rule out serious disease. A single normal strength, reflex, or sensory test cannot safely exclude stroke, cauda equina syndrome, or spinal cord pathology.
When an emergency is suspected, stop routine physiotherapy, maintain patient safety, initiate the appropriate referral or emergency response, and document the findings and actions taken. Do not delay escalation while completing a detailed examination.
10. Common mistakes to avoid
Even a technically correct examination can lead to poor clinical decisions if the findings are interpreted incorrectly.
| Common mistake | Better clinical practice |
|---|---|
| Interpreting one abnormal reflex as a diagnosis | Correlate reflexes with strength, sensation, and symptom distribution |
| Assuming 5/5 strength excludes neurological disease | Assess functional performance, endurance, dexterity, and other neurological signs |
| Testing sensation without comparing sides | Use consistent stimuli and map the affected distribution |
| Ignoring pain during strength testing | Record pain and distinguish pain-limited performance from possible neurological weakness |
| Repeating tests despite worsening symptoms | Stop and reassess the urgency of the presentation |
| Documenting only “neurological examination normal” | Record the actual tests performed and the relevant findings |
| Delaying referral to complete every test | Prioritize safety and urgent escalation when indicated |
11. A practical neurological examination checklist
Use this checklist as a reminder during routine clinical practice. It is not a substitute for a comprehensive examination when the presentation requires one.
Assessment checklist
0 of 15 completed
History and observation
Establish onset, progression, and symptom distribution
Screen for urgent warning signs
Observe speech, posture, gait, and functional ability
Motor examination
Assess relevant myotomes and muscle strength
Record MRC grades and side-to-side differences
Observe tone, coordination, and functional movement when indicated
Reflex examination
Test relevant deep tendon reflexes
Compare sides and record grades
Assess clonus or pathological reflexes when indicated
Sensory examination
Assess relevant sensory modalities
Map abnormalities by anatomical distribution
Consider protective sensation and falls risk
Clinical decisions and documentation
Integrate findings into a clinical hypothesis
Document objective findings and limitations
Record referral decisions, advice, and follow-up
Reset checklistCopy checklist
Conclusion
A systematic neurological examination enables physiotherapists to identify meaningful patterns of neurological dysfunction, establish an objective baseline, monitor changes, and make safer clinical decisions.
Reflexes provide information about reflex pathways and descending neurological influences. Sensory testing helps characterize the distribution and nature of sensory impairment. Strength testing identifies motor deficits and their functional consequences. Clinical reasoning brings these findings together to guide treatment, further assessment, and referral.
The key is not simply to perform each test correctly, but to understand what the findings mean in combination, in context, and over time. Equally important is recognizing when a presentation falls outside routine physiotherapy management and requires urgent medical attention.
With a structured approach, accurate documentation, and a clear understanding of warning signs, physiotherapists can improve the quality and safety of neurological assessment across clinical settings.
Further reading and clinical resources
For deeper study and clinical decision-making, consult:
American Spinal Injury Association (ASIA) — International Standards for Neurological Classification of Spinal Cord Injury (ISNCSCI).
National Institute for Health and Care Excellence (NICE) — guidance on suspected neurological conditions, spinal pain, and cauda equina syndrome.
American Academy of Neurology (AAN) — neurological examination and evidence-based clinical resources.
World Health Organization (WHO) — resources on stroke, neurological disorders, and rehabilitation.
Use current local clinical guidelines, emergency referral pathways, and professional standards when applying these principles in practice. This educational article supports clinical learning but does not replace formal training, supervised competency assessment, or individualized medical evaluation.
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