Interpretation of Electromyography and Nerve Conduction Studies

Summary of Findings:

1.

Left median motor study to APB has markedly prolonged distal onset latency, normal compound muscle action potential (CMAP) , and normal conduction velocity in the forearm.
2.

Left ulnar motor to ADM has normal distal onset latency, CMAP, and normal conduction velocity in the forearm.
3.

Left median sensory to the thumb and ring finger is absent.
4.

Left radial sensory to the thumb and ulnar sensory to the ring finger have normal peak latency and sensory nerve action potential (SNAP) .
5.

Left transpalmer study with markedly prolonged median peak latency, normal ulnar peak latency, and SNAPs.
6.

Left combined sensory index (CSI) study is abnormal at 2.5 ms (CSI is defined as median minus radial latency to thumb + median minus ulnar latency to ring + median minus ulnar latency across the palm. Normal CSI at the Carpal Tunnel is <1.0 ms).