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action potential |
Also found in: Medical, Wikipedia, Hutchinson | 0.04 sec. |
action potentialBrief (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). action potential [′ak·shən pə‚ten·chəl] (neuroscience) A transient change in electric potential at the surface of a nerve or muscle cell occurring at the moment of excitation. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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In rare cases, Schwob says, germs can move up the nerve and into the olfactory bulb, a relay station through which nerve signals enter the brain. If you step on the garden hose, the water stops, much like the nerve signals stop flowing when mechanical pressure is put on the nerves themselves. nbsp;they might be able to repair damaged myelin, regenerate injured axons, and restore nerve signal |
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