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Eye-Tracking Dysfunctions in Schizophrenic Patients and Their Relatives

Philip S. Holzman, PhD; Leonard R. Proctor, MD; Deborah L. Levy; Nicholas J. Yasillo; Herbert Y. Meltzer, MD; Stephen W. Hurt
Arch Gen Psychiatry. 1974;31(2):143-151. doi:10.1001/archpsyc.1974.01760140005001.
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A simple test of smooth-pursuit eye movements disclosed a striking association between deviant eye tracking and clinically diagnosed schizophrenia. A high proportion of the schizophrenic patients' first-degree relatives who were not themselves clinically schizophrenic also showed deviant eye-tracking behavior. The relationship of poor eye tracking and schizophrenia is even stronger when specific psychological test evidence of thought disorder is used operationally to classify patients. The eye-tracking dysfunction may thus represent a genetic marker that can prove highly useful for studying the transmission of a vulnerability to schizophrenia. The findings suggest proprioceptive and interoceptive involvement in schizophrenic pathology.


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