Am J Psychiatry 1987; 144:1584-1587
Copyright © 1987 by American Psychiatric Association
Accelerometric assessment of tardive dyskinesia
WW Tryon and B Pologe
Department of Psychology, Fordham University, Bronx, NY 10458.
Accelerometric measures associated with resting the hand, posturing the
arm, and moving the arm were taken in 10 patients with tardive dyskinesia
and eight schizophrenic patients matched for diagnosis, age, sex,
likelihood of medication to induce extrapyramidal symptoms, and
chlorpromazine-equivalent dose. A multivariate analysis of variance and
follow-up univariate analyses revealed that the tardive dyskinesia patients
showed 1) greater amplitude of dyskinetic movements, 2) lower peak
frequency of dyskinetic movements, and 3) more spikes-points beyond four
standard deviations from the mean. Multiple discriminant analyses revealed
that all patients were correctly classified as to presence or absence of
tardive dyskinesia.
