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action potential

   Also found in: Dictionary/thesaurus, Medical, Acronyms, Wikipedia, Hutchinson 0.07 sec.

action potential

Brief (about one-thousandth of a second) reversal of electric polarization of the membrane of a nerve or muscle cell. Stimulation of the cell by certain chemicals or by sensory receptor cells causes depolarization of the membrane, permitting an impulse to move along the nerve fibre (in nerve cells) or causing the cell to contract (in muscle cells).
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Average motor unit action potential (MUAP) frequencies for selected facial muscles of expression (frontalis, orbicularis oculi, levator labii, zygomaticus major, and orbicularis otis) ranged from 6.
Evidence in practice by Fish, Dale R. / Physical Therapy
(8) Electrocochleography may show an increased ratio of summating potential to action potential in patients with perilymph fistulae but, overall, findings can be similar to those in patients with Meniere's disease.
Noise-induced perilymph fistula by Sataloff, Robert T. / Ear, Nose and Throat Journal
As a result, I intended to exploit the shock action potential of the Coyote Light Armoured Vehicles to contain the Fort and conduct simultaneously a sensitive site exploitation operation.
Fledgling swans take flight: the Third Battalion, Princess Patricia's ... by Stogran, P. / The Canadian Army Journal
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