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Positive after-image, PAI: Early erasure by saccadic eye movement or Jendrassik manoeuvre

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Summary

Positive after-images (PAIs) evoked by low intensity stroboscopic flash are erased by voluntary large amplitude saccadic eye movements. The duration of the PAI is shortened by a Jendrassik manoeuvre. The results suggest that muscle spindle afferent impulses conducted centrally are involved in the erasure phenomenon. The duration of the PAI is modifiable by drugs. The social implications of PAI are considered briefly.

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Authors and Affiliations

  1. Department of Pharmacology and Experimental Therapeutics, Loyola University of Chicago, Stritch School of Medicine, 60153, Maywood, Illinois, USA

    A. H. Friedman & A. L. Marchese

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  1. A. H. Friedman
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  2. A. L. Marchese
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Supported in part by a General Research Support grant of N.I.H.

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Friedman, A.H., Marchese, A.L. Positive after-image, PAI: Early erasure by saccadic eye movement or Jendrassik manoeuvre. Experientia 34, 71–73 (1978). https://doi.org/10.1007/BF01921909

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