Answer by
muh4mm4d (28)
A tic is a brief, rapid, recurrent, and seemingly purposeless stereotyped motor contraction. Motor tics can be "simple," with movement only affecting an individual muscle group (e. g. , blinking, twitching of the nose, jerking of the neck), or "complex," with coordinated involvement of multiple muscle groups [e. g. , jumping, sniffing, head banging, and echopraxia]. Magnesium can't result in children having tics.