Saccadic eye movements in tracking, fixation, and rest in schizophrenic and normal subjects

Yoshihiko Matsue, Teruo Okuma, Hidemitsu Saito, Shuhei Aneha, Takashi Ueno, Hideaki Chiba, Hiroo Matsuoka

Research output: Contribution to journalArticlepeer-review

44 Citations (Scopus)

Abstract

Horizontal eye movements were recorded electrooculographically during two different eye fixation tasks, during an eves-closed waking state, and during eye tracking on a sinusoidally moving target in 16 chronic schizophrenics and in 12 normal subjects. The relationship between saccadic eye movements during tracking and in the other experimental situations was investigated. The intensities of eye fixation were successively de creased from Experiment 1 (eye fixation on a stationary target through Experiment II (eye fixation on an imagined spot in the dark) to Experiment III (eyes closed in the dark, no cue for eve fixation), in thai order. The frequency of saccades increased as the intensities of fixation decreased from Experiment I to Experiment III in both schizophrenic und normal groups. It was demonstrated that the frequency of saccades was higher in schizophrenics than in normal subjects in all of the experimental conditions. Some correlations were found between the increased frequency of saccades seen during eye tracking and the similar increases seen in eyes-fixated or eyes-closed states in schizophrenic subjects. It is suggested that the increased saccades seen during eye tracking and in other experimental conditions in schizophrenics are related to a deficit of nonvoluntary attention, due to a failure of an inhibitoy mechanism.

Original languageEnglish
Pages (from-to)382-389
Number of pages8
JournalBiological Psychiatry
Volume21
Issue number4
DOIs
Publication statusPublished - 1986 Apr

ASJC Scopus subject areas

  • Biological Psychiatry

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