An assembly of devices designed to apply electrical stimuli in one peripheral region of the body while the response is monitored in another peripheral region. It typically consists of external electrodes (e.g., hand-held bipolar or ring electrodes) or needle electrodes and a pulse generator. It is used for the stimulation of a peripheral nerve or muscle in motor-nerve conduction studies (e.g., the posterior tibial nerve), and/or in sensory-nerve conduction studies (e.g., the ulnar nerve) performed during clinical electrophysiology (EP) assessments.