The term “motor evoked potential” (MEP) commonly refers to the action potential elicited by non-invasive (magnetic) stimulation of the motor cortex through the scalp. MEPs can be recorded using surface electromyography from all skeletal muscles and are mediated by fast-conducting cortico-motoneuronal connections projecting monosynaptically to the alpha-motoneurons in the contralateral spinal cord. The principal MEP parameters are: threshold, latency, amplitude and central conduction time. MEP recordings represent a reliable method to detect abnormalities of impulse propagation along the corticospinal tract. The introduction of new techniques of paired-pulse or repetitive TMS allowed to test the excitability of motor cortical areas.
Motor evoked potential
Abbruzzese G.;Trompetto C.
2016-01-01
Abstract
The term “motor evoked potential” (MEP) commonly refers to the action potential elicited by non-invasive (magnetic) stimulation of the motor cortex through the scalp. MEPs can be recorded using surface electromyography from all skeletal muscles and are mediated by fast-conducting cortico-motoneuronal connections projecting monosynaptically to the alpha-motoneurons in the contralateral spinal cord. The principal MEP parameters are: threshold, latency, amplitude and central conduction time. MEP recordings represent a reliable method to detect abnormalities of impulse propagation along the corticospinal tract. The introduction of new techniques of paired-pulse or repetitive TMS allowed to test the excitability of motor cortical areas.
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