Motor unit action potentials

Motor unit action potentials

Spikes of electrical activity recorded during an EMG that reflect the number of motor units (motor neurons and the muscle fibers they transmit signals to) activated when the patient voluntarily contracts a muscle.
Mentioned in: Electromyography
References in periodicals archive ?
2) Electromyogram revealed polyphasic low amplitude motor unit action potentials of slow duration consistent with partial nerve root lesion.
Electromyography of supraspinatus, infraspinatus, masseter, deltoid and biceps muscles bilaterally revealed small polyphasic motor unit action potentials (MUAP) with early recruitment pattern consistent with a myopathic disorder.
However, significant differences were seen between the primiparous and the nulliparous subjects in the motor unit action potentials recorded by EMG.