accounting for the decreased amplitude of the compound muscle action potential while maintaining a normal nerve conduction velocity. The lack of change of the nerve conduction velocity would ...

The nerve conductions and EMG studies are usually normal in myasthenia gravis, but the repetitive stimulation of a nerve may demonstrate decrements of the muscle action potential. The muscle biopsy is ...

Patients selected for the study had more than a 10% decrease of the compound muscle action potential amplitude (CMAPamp) from the first to the fourth response for both the deltoid and the APB muscles.

This provides a method of determining whether or not the previously reported muscle volume changes are a direct consequence of the action potential and are thus not connected with contraction as such.