Hemidystonia refers to dystonia which involves the ipsilateral face, arm, and leg.
Comment:
In most cases of hemidystonia, a contralateral structural lesion of the basal ganglia or thalamus can be demonstrated by neuroimaging. Common aetiologies include stroke and trauma, and younger patients seem to have a greater propensity to develop hemidystonia after cerebral insults. There is often a latency between cerebral injury and the onset of dystonia. Hemidystonia may be preceded by ipsilateral hemiparesis which often resolves as hemidystonia develops.