nerve conduction study
Electrodiagnostic test measuring the speed and strength of electrical signals in peripheral nerves, abbreviated as NCS.
Full Definition
A nerve conduction study (NCS) is an electrodiagnostic procedure that measures the speed and amplitude of electrical impulses as they travel along peripheral nerves. The test involves stimulating nerves with small electrical pulses and recording responses from muscles or sensory receptors to assess nerve function and detect abnormalities such as neuropathy, nerve compression, or demyelination. NCS is typically performed in conjunction with electromyography (EMG) to provide comprehensive evaluation of the peripheral nervous system. The study can differentiate between axonal damage and demyelinating processes, localize sites of nerve injury, and monitor disease progression or treatment response.
Usage
Usage note: Often performed with EMG; abbreviate as NCS after first use; specify nerves tested in diagnostic reports.
In Context
- "Nerve conduction study revealed prolonged distal latencies consistent with carpal tunnel syndrome." — Electrodiagnostic report
- "The patient was scheduled for nerve conduction study to evaluate suspected peripheral neuropathy." — Neurology consultation