When performing a nerve conduction velocity (NCV)test,the therapist notes a change in the temporal dispersion; specifically,the amplitude of the M wave is decreased.What might this indicate?

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A decrease in the amplitude of the M wave with temporal dispersion suggests that there is partial denervation of the muscle being tested. This means that some of the nerve fibers supplying the muscle have been damaged or lost, leading to a reduction in the size and duration of the muscle response. This finding is indicative of a neuromuscular disorder and may help to diagnose conditions such as motor neuron disease, muscular dystrophy or peripheral neuropathy.

When Performing a Nerve Conduction Velocity (NCV)test,the Therapist Notes a Change