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Use of backward masking test for the study of visual information processing in healthy subjects and schizophrenic patients

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Abstract

The study of 14 healthy subjects and 15 schizophrenic patients was conducted under visual backward masking conditions. Sensory thresholds were identified using the method of constant stimuli. A special modification of the backward masking technique with lateralized presentation of test and masking stimuli was used to study the lateral characteristics of visual attention. It was found that the thresholds of letter stimulus identification were significantly higher in patients with schizophrenia than in healthy subjects. Only in patients the asymmetry of visual perception was revealed with the higher recognition thresholds in the left visual hemifield. The overall data analysis suggests an association between increased recognition thresholds in schizophrenic patients and changes in the interruption mechanism functioning at the neocortex level.

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Authors and Affiliations

  1. Serbskii Federal Medical Research Center of Psychiatry and Narcology, Moscow, Russia

    V. V. Myamlin, A. V. Kirenskaya & V. Y. Novototsky-Vlasov

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  1. V. V. Myamlin
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  2. A. V. Kirenskaya
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  3. V. Y. Novototsky-Vlasov
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Correspondence to V. V. Myamlin.

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Original Russian Text © V.V. Myamlin, A.V. Kirenskaya, V.Y. Novototsky-Vlasov, 2016, published in Fiziologiya Cheloveka, 2016, Vol. 42, No. 5, pp. 31–38.

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Myamlin, V.V., Kirenskaya, A.V. & Novototsky-Vlasov, V.Y. Use of backward masking test for the study of visual information processing in healthy subjects and schizophrenic patients. Hum Physiol 42, 492–498 (2016). https://doi.org/10.1134/S036211971605011X

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  • DOI: https://doi.org/10.1134/S036211971605011X

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