Involuntary action (3)
I believe the answer is:
tic
(Other definitions for tic that I've seen before include "Regular muscular twitch" , "jerk" , "Involuntary muscle movement" , "Nervous response" , "Nervous spasm" .)
I believe the answer is:
tic
(Other definitions for tic that I've seen before include "Regular muscular twitch" , "jerk" , "Involuntary muscle movement" , "Nervous response" , "Nervous spasm" .)