: Motor Nerve Conduction Study, Posterior Tibial Nerve

: What This Test Measures

: The posterior tibial nerve runs down the back of the leg and supplies several muscles of the calf and foot. During this study, small electrical pulses stimulate the nerve at one or more points, and recording electrodes capture the resulting muscle response. The test measures how fast the signal travels (conduction velocity), the size of the response (amplitude), and the delay before the muscle responds (latency).

: How the Test Is Performed

: You will likely lie on an exam table while a technician places electrodes on your skin over the nerve and over a muscle it controls, such as in the foot. Brief electrical pulses are delivered, which may cause a temporary tingling or twitching sensation. The procedure is generally quick, and most people tolerate it well.

: What to Expect

: You may feel mild discomfort or muscle twitching during stimulation, but this usually stops as soon as the pulse ends. Your skin may be cleaned before electrodes are applied, and you can typically return to normal activities right afterward. Tell the technician if you have a pacemaker or other implanted device before testing.

: How Results Are Used

: Your clinician compares the measured nerve signals with expected patterns to look for slowing, blockage, or reduced muscle response. Results are interpreted alongside your symptoms, physical exam, and other tests to help identify conditions such as nerve compression or neuropathy.