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H. Shekhar, F.A. Proudlock, M. Reveley, A. Arora, I. Gottlob; Eye-Head Coordination in Schizophrenia . Invest. Ophthalmol. Vis. Sci. 2003;44(13):1937.
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© ARVO (1962-2015); The Authors (2016-present)
Purpose: Little is known about the affect of schizophrenia on head movements. We have investigated head movements in schizophrenic subjects during simple visual tasks. Methods: A high-resolution infrared tracker (250 Hz) was used to record eye and head movements during saccades, antisaccades, smooth pursuit (20° and 40°/s), and reading tasks in 17 schizophrenic subjects and 17 age-matched controls. Results: Schizophrenic subjects made significantly larger head movements during both smooth pursuit paradigms and the antisaccadic task (P<0.05). However, during the saccadic task or reading head movements were similar to controls. Schizophrenics showed eye movement abnormalities during saccadic tasks (saccades, antisaccades and reading) but not during smooth pursuit. Conclusions: Our results confirm previously described eye movement deficits. We have demonstrated that schizophrenics show abnormal head movements during smooth pursuit and antisaccadic tasks. These may provide an important biological marker.
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