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Nerve conduction studies are used mainly for evaluation of paresthesias ( numbness, tingling, burning) and/or weakness of the arms and legs. The type of study required is dependent in part by the symptoms presented. A physical exam and thorough history also help to direct the investigation.
In neuroscience, nerve conduction velocity ( CV) is the speed at which an electrochemical impulse propagates down a neural pathway. Conduction velocities are affected by a wide array of factors, which include age, sex, and various medical conditions.
A few common uses are determining whether a muscle is active or inactive during movement (onset of activity), assessing the velocity of nerve conduction, and the amount of force generated during movement. EMGs are the basis for nerve conduction studies which measure the electrical conduction velocity and other characteristics of nerves in the body.
Repetitive nerve stimulation is a variant of the nerve conduction study where electrical stimulation is delivered to a motor nerve repeatedly several times per second.
In hospitals that possess clinical neurophysiology facilities, the major diagnostic modalities employed include: Electromyography and nerve conduction studies: These diagnostic tests of the peripheral nervous system are especially useful in evaluating diseases of the muscles, nerves, and nerve roots. The basis of these tests is recording ...
Nerve conduction studies will show absent or reduced sensory nerve conduction action potentials in the upper and lower limbs with preserved conduction velocity. [4] Motor nerve action potentials and conduction are usually unaffected, but in a subset of cases may have limited dysfunction. [2]
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