What is measured in the action potential response during nerve conduction studies?

In nerve conduction studies, the action potential response is primarily assessed by measuring both response amplitude and latency.

Response amplitude indicates the size and strength of the electrical signal generated by the nerve fibers when they are stimulated. This measurement helps to determine the number of nerve fibers that are functioning properly; a reduced amplitude can suggest nerve damage or dysfunction.

Latency refers to the time taken for the electrical impulse to travel along the nerve from the point of stimulation to the recording electrode. This measurement provides insight into the conduction velocity of the nerve, which can be affected by factors such as demyelination or other injuries.

Together, these measurements of amplitude and latency allow clinicians to evaluate the integrity and functionality of nerve pathways, making them crucial metrics in diagnosing various neurological conditions.