compound muscle action potential造句

• When the " axon " is damaged, on the other hand, this results in a reduced compound muscle action potential ( CMAP ).
• Electromyographic ( EMG ) studies usually show a variable reduction in the amplitude of compound muscle action potentials, but no abnormalities of repetitive nerve stimulation studies.
• This test measures the amplitude of a nerve response ( called the Compound Muscle Action Potential or CMAP ) for 40 to 50 minutes following a few minutes of exercise.
• The compound muscle action potential ( CMAP ) size is found using supramaximal stimulation of the motor nerve to the muscle or muscle group ( similar to a nerve conduction study ).
• On nerve conduction studies, the pattern of diminished Compound muscle action potential and normal sensory nerve action potential may be seen given that the lesion is proximal to the Posterior root ganglion.
• Repeated stimuli over a period of about 10 seconds eventually lead to sufficient delivery of calcium, and an increase in muscle contraction to normal levels, which can be demonstrated using an electrodiagnostic medicine study called needle electromyography by increasing amplitude of repeated compound muscle action potentials.
• Treatment for LEMS consists of using 3, 4-diaminopyridine as a first measure, which serves to increase the compound muscle action potential as well as muscle strength by lengthening the time that voltage-gated calcium channels remain open after blocking voltage-gated potassium channels.
• Electrodiagnostic abnormalities common to myopathies and neuropathies include; abnormal spontaneous activity ( e . g ., fibrillations, positive sharp waves, etc . ) on needle EMG and, small amplitudes of the motor responses compound muscle action potential, or CMAP during nerve conduction studies.