Median nerve compression at the carpal tunnel causing nocturnal paresthesia, sensory symptoms and sometimes thenar weakness.
THE MSK CLINICAL STORY
The midnight hand alarm and the nerve with a narrow hallway
A fictional teaching case. Follow the clues, enjoy the conversation, and make the decisions a thoughtful clinician would make—not an instant diagnosis from a single symptom.
Scene 01 · The patient walks in
A graphic designer wakes at 2 a.m. shaking a tingling hand. The thumb, index and middle fingers complain most. The little finger seems suspiciously quiet.
A little clinic conversation
Patient: 'Maybe my whole arm has fallen asleep?' Therapist: 'Let's ask which fingers attended the meeting.'
Scene 02 · Follow the clues
Night symptoms and median-distribution paresthesia support carpal tunnel syndrome. The little finger is usually spared, but symptom patterns vary and proximal causes remain possible.
Plot twist · What could fool us?
A provocative test on its own does not settle the diagnosis. Constant numbness or progressive thenar weakness warrants timely further assessment.
Choose your learning lens
Same clinical case, two ways to understand it. The complete examination and treatment guide is still available below.
In everyday words
A nerve at the wrist may be under pressure and causing the night-time tingling. Simple strategies, such as a neutral night splint for suitable cases, may help; worsening weakness needs assessment.
Scene 03 · The rehabilitation journey
Reduce aggravating wrist positions and nighttime symptoms → optimize function and ergonomic load → reassess sensation/strength and refer when indicated.
Which symptom cluster most supports carpal tunnel syndrome?
Choose one answer to reveal the explanation. No score, no pressure—just better clinical reasoning.
These cases teach reasoning; they do not provide a diagnosis for an individual patient. Always consider red flags, contraindications, comorbidities and local referral pathways.
Severe with weakness/thenar atrophy or marked electrodiagnostic change
Symptoms
Numbness/tingling thumb, index, middle and radial half of ring finger
Night symptoms
Hand shaking for relief
Grip/clumsiness in more advanced cases
Clinical Signs
Sensory change in median distribution
Thenar weakness/atrophy in severe cases
Positive provocative tests
Red Flags & Referral Clues
Rapid progressive weakness
Proximal neurologic signs
Trauma/fracture
Systemic neuropathy pattern
Diagnostic Examination
How to perform the tests — step by step
Each test includes patient setup, therapist position, hand placement, exact performance, positive finding and clinical interpretation.
Phalen Test
Provoke median nerve symptoms by sustained wrist flexion.
Patient position
Sitting or standing.
Therapist position
Observes.
Hand placement
Patient places dorsal hands together with wrists maximally flexed as tolerated.
How to perform
1Flex both wrists and press backs of hands together.
2Hold up to about 60 seconds or until symptoms occur.
3Ask about distribution of tingling/numbness.
Positive sign
Typical median-distribution paresthesia.
Interpretation
Supports CTS; should be combined with history and other examination findings.
Durkan Carpal Compression Test
Directly increase pressure over the carpal tunnel.
Patient position
Sitting with forearm supported.
Therapist position
In front of patient.
Hand placement
Thumbs/fingers over the carpal tunnel just distal to wrist crease.
How to perform
1Apply firm direct pressure over carpal tunnel.
2Maintain for up to about 30 seconds or until symptoms reproduce.
Positive sign
Typical median-distribution paresthesia.
Interpretation
Supports CTS.
Tinel Sign at Wrist
Assess irritability of median nerve at carpal tunnel.
Patient position
Forearm supported, palm up.
Therapist position
At the hand.
Hand placement
Tap gently over median nerve/carpal tunnel.
How to perform
1Percuss over the carpal tunnel several times.
2Ask whether tingling radiates into median-innervated digits.
Positive sign
Tingling/electric sensation into median distribution.
Interpretation
Supportive but not definitive alone.
Differential Diagnosis
Cervical radiculopathy
Pronator syndrome
Peripheral polyneuropathy
Thumb CMC OA
Ulnar neuropathy
Investigations / Imaging
Electrodiagnostic testing is useful for severity, atypical cases and preoperative evaluation depending on guideline/pathway.
Ultrasound may be used in selected settings.
Complete Rehabilitation Plan
From protection to full function
Phase 1 — Reduce Compression & Night Symptoms
Reduce sustained wrist compression and improve sleep.
What to do
Neutral wrist night splint when appropriate
Activity/ergonomic modification
Education about symptom-provoking wrist positions
Exercise dosage
Gentle tendon/nerve gliding: 1–3 sets of 5–10, avoiding symptom flare
Progress when
Night symptoms reduce
Daytime paresthesia less frequent
Phase 2 — Function & Contributing Factors
Restore hand/forearm capacity without provoking nerve symptoms.
What to do
Gradual grip/forearm strengthening
Proximal posture/neck screening if indicated
Workstation/task modification
Exercise dosage
Grip/forearm strengthening: 2–3 x 8–15, symptom-monitored
Progress when
Functional tasks tolerated with less paresthesia
Manual Therapy — Role & Application
Neural/tendon gliding and selected carpal mobilization may be used as adjuncts.
Avoid aggressive nerve stretching that reproduces persistent paresthesia.
Modalities — Use / Avoid
Night splinting is more clinically relevant than routine electrotherapy.
Escalate for medical/surgical review when weakness, thenar atrophy or persistent significant symptoms occur.
Return / Discharge Criteria
Minimal/no night waking
Stable sensation/strength
Work/hand tasks tolerated
No progressive thenar weakness
Common Clinical Mistakes
Ignoring cervical/proximal nerve differential
Aggressive neural tensioning
Delaying referral when motor loss appears
Clinical Pearls
Nocturnal median-distribution paresthesia is a classic history clue.
Provocative tests support but do not replace a full neurologic and upper-quarter examination.
Continue learning
Connect assessment with management
Use the related PNA learning pathways to explore examination techniques and structured rehabilitation. A test result should always be interpreted alongside the history, full examination and clinical presentation.
Use these sources as a starting point for clinical learning. A reference being listed here does not, by itself, establish that every recommendation on this page is strongly supported. Check the original publication, study design, population and limitations before applying findings to an individual patient.
Educational resource only. Tests and treatment plans must be adapted to the individual patient, irritability, comorbidities, surgical restrictions and local scope-of-practice requirements.
