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Abstract
The aim of this study was to measure the motor conduction time (MCT) and velocity of the lateral pectoral nerve (LPN) in normal subjects and patients with neuropathy. For the LPN, we determined that the average MCT was 3.9 m/s using Erb stimulation with needle recording, and the average motor conduction velocity was 70.6 m/s using Erb stimulation and axilla stimulation with needle recordings in normal subjects. In patients, prolonged MCT in LPN was found in 3 of 6 patients with unilateral plexopathy and 3 of 4 patients with polyneuropathy. It was determined that MCT and motor conduction velocity in LPN was as sensitive as biceps brachii MCT in patients with unilateral plexopathy. Furthermore, the motor conduction velocity in the LPN may be beneficial to elucidate the localization of involvement in polyneuropathies, such as distal or proximo-distal