Nerve conduction velocity studies (NCV)

Overview

It helps in evaluating conduction in various large peripheral nerves in our body. The latency, amplitude, and conduction velocity are calculated for the nerve under investigation. A decrease in recorded amplitude implies damage to the axons of the nerve (axonal neuropathy). If the myelin sheath surrounding the nerve gets affected, the nerve conducts the electrical impulse slowly and its conduction velocity decreases. This is seen in demyelinating disorders. Both motor and sensory component of the nerves are studied using this method.