Examination Upper Limbs

Triceps jerk

Hoffman reflex C7, C8

Triceps jerk

Radial nerve.

Strike the patient's elbow a few inches above the olecranon process. Look for elbow extension and triceps contraction.

Hoffman reflex C7, C8

Flick the patient's terminal phalanx, suddenly stretching the flexor tendon on release. Thumb flexion indicates hyperreflexia. (May be present in normal subjects with brisk tendon reflexes.)

Reflex enhancemnt

When reflexes are difficult to elicit, enhancement occurs if the patient is asked to 'clench the teeth'.

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