Twitch

• Muscle twitch, a muscle contraction
• Fasciculation, a small, local, involuntary muscle contraction
• Myoclonic twitch, a jerk usually caused by sudden muscle contractions
• Myokymia, an continuous, involuntary muscle twitch that affects the muscles of the face, particularly the eyelids
• Spasm, a sudden, involuntary contraction of a muscle, group of muscles, hollow organ, or orifice
• Tic, a sudden, repetitive, nonrhythmic movement or sound that involves discrete groups of muscles

In entertainment:

• Twitch (film), a short film directed by Leah Meyerhoff
• Twitch (album), by Ministry
• Twitch (Aldo Nova album)
• Twitch (EP), by Jebediah
• Max "Twitch" Williams, a police officer in the comic series Sam and Twitch, a spinoff of Spawn
• Stephen "Twitch" Boss, a finalist in the fourth season of the TV series So You Think You Can Dance

In other uses:

• Twitch (device), a device used to restrain horses
• "Twitch", in birdwatching, to pursue and observe a rare bird

See also

• Twitch game, a computer or video game in which the player must react quickly