This article includes a summary of the several common locations of nerve entrapment and their symptoms
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NERVE
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SYMPTOMS
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MUSCLE WEAKNESS/WASTING
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AREA SENSORY LOSS
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MEDIAN (at wrist)
Carpal tunnel syndrome
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Pain and paraesthesia on palmer aspect hands and fingers, waking pt from sleep. Pain may extend to arm and shoulder
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Abductor pollicis brevis
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Lateral palm and thumb, middle and half ring finger
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ULNAR (at elbow)
Cubital fossa syndrome
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Parasthesia on medial border of hand , wasting and weakness of hand muscles
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All small hand muscles, excluding abductor pollicis brevis
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Medial palm and and little finger and half ring finger.
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RADIAL
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Weakness of extension of wrist and fingers – often precipitated by sleeping in abnormal posture ie. arm over back of chair.
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Wrist and finger extensors
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Dorsum of thumb
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PERONEAL
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Foot drop, trauma to head of fibula
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Dorsiflexion and eversion of foot
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Nil or dorsim of foot
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LAT CUTANEOUS NERVE OF THIGH
(meralgia paraesthetica)
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Tingling and dysaethesia on lat border thigh
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Nil
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Lat border thigh
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