fig1

Figure 1. Nerve conduction responses. A: Stimulation of motor axons recording over the muscle with detecting a compound muscle action potential (CMAP). Amplitude reflects the number of muscle fibers contributing to the response; distal latency reflects the time (msec) it takes for a stimulus to pass along a nerve to produce the CMAP. B: Stimulation of a sensory nerve recording a sensory nerve action potential (SNAP). Amplitude reflects the number of nerve axons contributing to the response. Distal latency is equivalent to conduction velocity.