Infant dystonia disorder causes involuntary muscle contractions in babies, but it's actually a neurological condition. (grayandwhitelaw.com)
One suggested explanation is a neurological condition called focal dystonia that results in involuntary muscle contractions when performing a motor task and tends to affect a muscle group that is used frequently and repeatedly. (scientificamerican.com)
Denoting, as in English, a nervous twitch or tremor caused by involuntary muscle contractions, the term may bring to mind a syndrome that disrupts everyday activities; the power of the unconscious, which eludes deliberate control; or any anomaly that calls normality into question. (artforum.com)