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Abstract
Eye movements in 10 acute schizophrenics, 50 chronic schizophrenics, 20 remitted schizophrenics,
25 methamphetamine psychotics, 21 temporal lobe epileptics with left-sided spike focus
(l-focus), 12 temporal lobe epileptics with right-sided spike focus (r-focus), and
50 normal controls were examined with an eye mark recorder while they viewed geometric
figures. The eye movements while viewing an original “S”-shaped figure for 15 sec
were analyzed. Each schizophrenic group and methamphetamine psychotics had significantly
less eye fixations than the normal controls and temporal lobe epileptics (r-focus
and l-focus). The chronic schizophrenics had significantly shorter mean eye scanning
length (MESL) than the other six groups. Each subject was then shown two other figures
slightly different from the original and was requested to compare them with the original.
After comparing them, the subjects were asked the question, “Are there any other differences?”
The 5-sec eye movements during the response to this question were scored using the
Responsive Search Score (RSS). The schizophrenic groups had a significantly lower
RSS than the nonschizophrenic patient groups and the normal controls. In the chronic
schizophrenics, there was a significant negative correlation between the RSS and negative
symptoms. These results suggest that the MESL can be an indicator of a chronic process
of schizophrenia, and that lowering of the RSS may be nosologically specific indicator
for schizophrenia.
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Article info
Publication history
Received in revised form:
July 17,
1989
Received:
January 13,
1989
Footnotes
☆This study was supported in part by Grant No. 86–0707 from National Center for Nervous, Mental and Muscular Disorders (NCNMMD) of the Ministry of Health and Welfare, Japan.
Identification
Copyright
© 1990 Published by Elsevier Inc.
