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All-or-none law

Definition of the noun all-or-none law

What does all-or-none law mean as a name of something?


  1. (neurophysiology) a nerve impulse resulting from a weak stimulus is just as strong as a nerve impulse resulting from a strong stimulus


The all-or-none law is the principle that the strength by which a nerve or muscle fiber responds to a stimulus is independent of the strength of the stimulus. If the stimulus exceeds the threshold potential, the nerve or muscle fiber will give a complete response; otherwise, there is no response.

Printed dictionaries and other books with definitions for All-or-none law

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Google previewDictionary of Theories, Laws, and Concepts in Psychology (1998)

by Jon E. Roeckelein

coins the term essential identity law, which is related to the physiological all-or-none law and refers to the fact that nerve impulses are all the same in kind. For example, impulses traveling in optic nerve fibers differ qualitatively ...

Google previewThe Dictionary for Human Factors/Ergonomics (1992)

by James H. Stramler, Jr.

acidosis all-or-none law a rule that once an action ...

Google previewA Dictionary of Biology (1957)

by Michael Abercrombie, Clarence James Hickman, M. L. Johnson

ALL-OR-NONE LAW 13 ALIMENTARY (ENTERIC) CANAL. The gut; a tube concerned with digestion and absorption of food. In some animals it has one opening only (Coelenterates, flatworms), but in most it has an opening (mouth) into which ...

Google previewA Dictionary of Psychology (2009)

by Andrew M. Colman

all-or-none law n. A fundamental proposition about nerve impulses according to which the strength or intensity of a *stimulus (1) does not ...

Google previewOxford Dictionary of Sports Science and Medicine (2006)

by Michael Kent

all-or-none law A law stating that certain structures, such as a neurone or a muscle fibre, either respond completely (all) or not at all (none) to a stimulus. There is no partial nerve impulse in a neurone, ...

Google previewMacmillan Dictionary of Psychology (1991)

by Stuart Sutherland

all-or-none law. (Neurophysiology) The principle that, for a given segment of a nerve cell, the nerve impulse is always of the same strength. all-or-none learning theory. (Psychology) The theory that the learning of a ...

Google previewEncyclopaedic Dictionary of Psychological Terms (1994)

by J. C. Banerjee

All-or-None Law, All-or-Nothing Law: The law indicating ...

Google previewBailliere's Nurses' Dictionary (2014)

for Nurses and Healthcare Workers by Barbara F. Weller

all-or-none law principle that states that in individual cardiac and skeletal muscle fibres there are only two possible ...

Google previewBailliere's Nurses Dictionary for Nurses and Health Care Workers, 1st South Asia Edition (2016)

by Annu Kaushik

all-or-none law principle that states that in individual cardiac and skeletal muscle fibres there are only two possible ...

Google previewBlackwell's Nursing Dictionary (2013)

by Dawn Freshwater, Sian Masiln-Prothero

all-or-none law: States that when a ...

Google previewChurchill Livingstone Medical Dictionary (2008)

by Chris Brooker

all-or-none law/phenomenon n relates to the conduction of action potentials in nerve or muscle fibres (excitable tissue). The action potential in a particular fibre is always the same size regardless of the intensity of the stimulus.

Google previewDICTIONARY OF MEDICAL TERMS,6th ed. (2012)

all-or-none law N. principle describing the characteristic response of a nerve fiber or a muscle, esp. the heart muscle, whereby any stimulus above ...

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