action potential

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action potential

A momentary change in electrical potential on the surface of a cell, especially of a nerve or muscle cell, that occurs when it is stimulated, resulting in the transmission of an electrical impulse.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

action potential

(Physiology) a localized change in electrical potential, from about –70 mV to +30 mV and back again, that occurs across a nerve fibre during transmission of a nerve impulse

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

ac′tion poten`tial

the change in electrical potential that occurs between the inside and outside of a nerve or muscle fiber when it is stimulated, serving to transmit nerve signals. Compare nerve impulse.

action potential

- A brief electrical signal transmitted along a nerve or muscle fiber following stimulation.

See also related terms for nerve.

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Noun

action potential - the local voltage change across the cell wall as a nerve impulse is transmitted

nerve impulse, nervous impulse, neural impulse, impulse - the electrical discharge that travels along a nerve fiber; "they demonstrated the transmission of impulses from the cortex to the hypothalamus"

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References in periodicals archive ?

At week 12 post operation, results showed that compound action potential amplitude in gastrocnemius muscle was reduced in axotomy group compared with that in control.

Impairment Induction by Axotomy in Motor Functional and Histological Anterior Horn of Spinal Cord Structure/Induccion del Deterioro por Axotomia en la Estructura Motora Funcional e Histologica del Asta Anterior de la Medula Espinal

Summary of results using the Nucleus CI24M implant to record the electrically evoked compound action potential. Ear Hear 1999; 20: 45-59.

Examination and Comparison of Electrically Evoked Compound Action Potentials and Electrically Evoked Auditory Brainstem Response Results of Children with Cochlear Implantation without Inner Ear Anomaly

A simple two-component model of the electrically evoked compound action potential in the human cochlea.

Comparison of a Traditional and Novel Evoked Compound Action Potentials Recording Approach and Evoked Auditory Brainstem Responses in Pediatric Cochlear Implants Users

Accordingly, inhibition of these channels through the Fampridine therapy could partially restore the physiologic monophasic compound action potential (4).

Fampridine Therapy in Multiple Sclerosis: We Should Think Twice!/Multipl Sklerozda Fampiridin Tedavisi: Iki Kere Dusunmemiz Gerekiyor!

Effects of terpineol on the compound action potential of the rat sciatic nerve.

Effects of Lippia sidoides essential oil, thymol, p-cymene, myrcene and caryophyllene on rat sciatic nerve excitability

(14) Kosugi et al., (2010) examined the effects of various adrenoceptor agonists including dexmedetomidine, tetracaine, oxymetazoline and clonidine, and also an [alpha]2 adrenoceptor antagonist (atipamezole) on compound action potential (CAP) recorded from frog sciatic nerve, and found that CAPs were inhibited by [alpha]2 adrenoceptor.

A comparitive study of clonidine and dexmedetomidine as adjuvant to 0.25% bupivacaine in supraclavicular brachial plexus block for duration of action and haemodynamic changes

There also was a reduction in amplitude and an increase in latency and duration of the compound action potential. Ice massage, ice pack, and cold water immersion reduced sensory nerve conduction velocity (NCV) by 20.4, 16.7, and 22.6 m/s and motor NCV by 2.5, 2.1, and 8.3 m/s, respectively.