Authors: I. Kagan, M. Gur, D.M. Snodderly

E-mail address: kigor@tx.technion.ac.il

Phone: 617-9127485

Affiliation: Dept. of Biomedical Eng., Technion

Title: THE INFLUENCE OF FIXATIONAL EYE MOVEMENTS ON CELL CLASSIFICATION IN V1 OF ALERT MONKEYS

Abstract

In alert monkeys, even in well-trained ones, small eye movements occur during fixation periods. These movements constantly shift the retinal image, thus modifying the stimulus-generated responses during visual stimulation. Although now it is becoming widely appreciated that eye movements play an important role in shaping neuronal activity in behaving monkeys, the extent of the eye movements' impact on stimulus-evoked activity is not clear. In this study we analyze the effects of fixational eye movements on responses of V1 neurons to drifting gratings, that have been used to distinguish between simple and complex cells in anaesthetized animals. Then we test whether the same classification scheme can be applied in alert monkeys, using both spatial mapping and response modulation measures. Our results demonstrate that many cells in our preparation (duplex cells) have properties that are intermediate between simple and complex cells.

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