Twitch may refer to: . Biology. Muscle contraction. Convulsion, rapid and repeated muscle contraction and relaxation. Fasciculation, a small, local, involuntary muscle contraction. Myoclonic twitch, a jerk usually caused by sudden muscle contractions. Myokymia, a continuous, involuntary muscle twitch that affects the muscles of the face. Spasm, a sudden, involuntary contraction. Tic, an involuntary, repetitive, nonrhythmic action. Tremor, an involuntary, repetitive, somewhat rhythmic action. Twitching motility, a form of crawling some bacteria use to move over surfaces. Entertainment.
https://en.wikipedia.org/wiki/Twitch