Medical Definition of All-or-nothing phenomenon

1. Refers to the phenomenon where the strength of a nerve impulse is not dependent on the strength of the stimulus. Instead, there is a threshold level of stimulus strength that must be reached before the nerve will fire an impulse (at full capacity). Below the threshold, the nerve will not fire at all. It also refers to the same phenomenon observed in the heart muscle, which will either contract fully or not at all. In studies of behaviour, it refers to the same phenomenon where a behavioural stimulus will either produce a complete response or no response at all. Also called all-or-nothing principle, all-or-none law, all-or-none responsiveness, etc. (15 Nov 1997)



All-or-nothing Phenomenon Pictures

Click the following link to bring up a new window with an automated collection of images related to the term: All-or-nothing Phenomenon Images

Lexicographical Neighbors of All-or-nothing Phenomenon

all-important(a)
all-in
all-in-one
all-in-ones
all-in wrestling
all-inclusive
all-ins
all-knowing
all-mains(a)
all-night
all-night-man
all-nighter
all-nighters
all-or-none law
all-or-nothing
all-or-nothing phenomenon (current term)
all-out
all-outer
all-over
all-over oneself
all-overish
all-overishness
all-powerful
all-purpose
all-round
all-round(a)
all-round education
all-rounder
all-rounders
all-seater stadium

Other Resources Relating to: All-or-nothing phenomenon

Search for All-or-nothing phenomenon on Dictionary.com!Search for All-or-nothing phenomenon on Thesaurus.com!Search for All-or-nothing phenomenon on Google!Search for All-or-nothing phenomenon on Wikipedia!

Search