In the CD-ROM "Abnormal Psychology: Inside-Out," Etta displayed involuntary,"tic-like" hand movements that were described as being related to a condition known as tardive dyskinesia.These movements are most likely caused by

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Tardive dyskinesia is a movement disorder that can be caused by long-term use of antipsychotic medication. Since Etta has a long history of taking antipsychotic medications, it is most likely that her involuntary hand movements are related to this condition. Schizophrenia and peripheral nervous system degradation are not known to cause tardive dyskinesia, and there is no indication that being nervous in front of the camera would cause these types of movements.

In the CD-ROM "Abnormal Psychology: Inside-Out," Etta Displayed Involuntary,"tic-Like" Hand