twitch muscle

twitch muscle
Striated muscle innervated by a single motoneuron and having an electrically excitable membrane that exhibits an all-or-none response (cf. tonic muscle) : in mammals almost all skeletal muscles are twitch muscles. Physiologists often divide muscles into fast- and slow-twitch types, the fast-twitch muscles being associated with fast motor units.

Dictionary of molecular biology. 2004.

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  • twitch´ing|ly — twitch «twihch», verb, noun. –v.i., v.t. 1. to move with a quick jerk: »The child s mouth twitched as if she were about to cry. 2. to pull with a sudden tug or jerk; pull (at): »She twitched the curtain aside. –n. 1. a slight, involuntary… …   Useful english dictionary

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