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Abstract
Several aspects of fine motor control were compared in schizophrenics and two control
populations. The motor behavior analyzed was a button-press response in a forced choice
paradigm. Three areas of abnormality were seen in schizophrenics: first, the interval
preceding the motor response was characterized by reduced motor steadiness prior to
the button-press response; second, the motor response was made with excessive force
(hyperdynamia); and third, the agonist-antagonist synchrony (motor reversal) was impaired.
Schizophrenics on and off neuroleptics did not differ on any measure of motor control,
but schizophrenics with clinically observed tardive dyskinesia were found to have
significantly less steadiness prior to the motor response than other schizophrenics.
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Article info
Publication history
Received in revised form:
June 17,
1988
Received:
February 19,
1988
Identification
Copyright
© 1989 Published by Elsevier Inc.
