Do nerve conduction tests hurt4/29/2023 ![]() ![]() Slower speeds may be caused by injury to a nerve or group of nerves. NCV: In nerve conduction studies, the speed of nerve impulses is slower than what is normal for that nerve. Abnormal wave lines when a muscle contracts may mean a muscle or nerve problem, such as a herniated disc, amyotrophic lateral sclerosis (ALS), or inflammation. Nerve conduction velocities generally get slower as a person gets older.ĮMG: Electrical activity in a muscle at rest shows that there may be a problem with the nerve supply to the muscle. Different nerves have different normal conduction velocities. Sensory nerves allow the brain to feel pain, touch, temperature, and vibration. NCV: The nerve conduction studies show that the nerves send electrical impulses to the muscles or along the sensory nerves at normal speeds, or conduction velocities. There is a smooth, wavy line on the recording with each muscle contraction. Your primary care doctor, or the doctor who ordered the EMG, will discuss the full report with you at a follow- up appointment.ĮMG: The EMG recording shows no electrical activity when the muscle is at rest. Your doctor may be able to tell you about some of the results of your nerve studies right after the tests.
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