A 27-year-old female is brought in by her parents. She is
known to be schizophrenic and is on Trifluoperazine for this.
The parents tell you that their daughter seems to be
exceedingly restless and never seems to stay still.
You observe that the patient is seated on a chair but is
continuously crossing and uncrossing her legs and fidgeting with her clothes
and touching her hair.
On examination there is no tremor, the muscle tone is
normal and there is no weakness of her muscles. The rest of the neurological
examination is unremarkable.
The condition the patient has is: