The Median Nerve

The sensory response can be recorded from the thumb, index, middle or ring fingers (combination of median and ulnar fibers). The motor response is recorded from the abductor pollicis brevis (APB) muscle. In our laboratory we routinely study the index and middle finger. Record sensory responses from both the second and third digits and the motor response from the abductor pollicis brevis (APB). Palmar studies are described below.

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