all-or-none law

all-or-none law
all-or-none law n a principle in physiology: in any single nerve or muscle fiber the response to a stimulus above threshold level is maximal and independent of the intensity of the stimulus

* * *

see all or none.

Medical dictionary. 2011.

Look at other dictionaries:

  • All-or-none law — The all or none law is the principle that the strength by which a nerve or muscle fiber responds to a stimulus is not dependent on the strength of the stimulus. If the stimulus is any strength above threshold, the nerve or muscle fiber will… …   Wikipedia

  • all-or-none law — /awl euhr nun /, Physiol. the principle that under given conditions the response of a nerve or muscle fiber to a stimulus at any strength above the threshold is the same: the muscle or nerve responds completely or not at all. [1895 1900] * * * ▪… …   Universalium

  • all-or-none law — noun (neurophysiology) a nerve impulse resulting from a weak stimulus is just as strong as a nerve impulse resulting from a strong stimulus • Topics: ↑neurophysiology • Hypernyms: ↑law, ↑law of nature * * * noun : a principle in physiology …   Useful english dictionary

  • Закон «все или ничего» (all-or-none law) — Типичный нейрон, или нервная клетка, состоит из клеточного тела, дендритов и аксона. Аксон обычно представляет собой сравнительно длинный отросток, тянущийся далеко от тела клетки и служащий той линией связи, по к рой сигналы от данной клетки… …   Психологическая энциклопедия

  • all-or-none — (ôl ər nŭnʹ) adj. Characterized by either a complete response or by a total lack of response or effect, as in neurological action above a threshold: “Nerve impulses follow the All or None Law that is, a nerve impulse generated by a weak stimulus… …   Universalium

  • all or none — See Bowditch law. * * * (awl or nun) 1. the principle that the heart muscle, under whatever stimulus, will contract to the fullest extent or not at all; stimulation of any single atrial or ventricular muscle fiber causes the action potential to… …   Medical dictionary

  • law of nature — noun a generalization that describes recurring facts or events in nature (Freq. 3) the laws of thermodynamics • Syn: ↑law • Hypernyms: ↑concept, ↑conception, ↑construct • …   Useful english dictionary

  • Law — [From Old English lagu something laid down or fixed ; legal comes from Latin legalis , from lex law , statute ( [ searchmode=none Law] , Online Etymology Dictionary; [http://www.merriam… …   Wikipedia

  • Law review — Not to be confused with judicial review. A law review is a scholarly journal focusing on legal issues, normally published by an organization of students at a law school or through a bar association.[1] The term is also used to describe the… …   Wikipedia

  • law — 1. A principle or rule. 2. A statement of fact detailing a sequence or relation of phenomena that is invariable under given conditions. SEE ALSO: principle, rule, theorem. [A.S. lagu] Alexander l. states that a jerky nystagmus becomes worse when… …   Medical dictionary

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