HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text Full Text (PDF) Supplemental Figure All Versions of this Article: 95/6/3712    most recent 00112.2006v1 Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via ISI Web of Science (5) Citing Articles via Google Scholar Google Scholar Articles by Barthélemy, F. V. Articles by Masson, G. S. Search for Related Content PubMed PubMed Citation Articles by Barthélemy, F. V. Articles by Masson, G. S.

Behavioral Receptive Field for Ocular Following in Humans: Dynamics of Spatial Summation and Center-Surround Interactions

Institut de Neurosciences Cognitives de la Méditerranée, Centre National de la Recherche Scientifique Unité Mixte de Recherche 6193, Aix-Marseille Université, Marseille, France

Submitted 1 February 2006; accepted in final form 7 March 2006

Visual neurons integrate information over a finite part of the visual field with high selectivity. This classical receptive field is modulated by peripheral inputs that play a role in both neuronal response normalization and contextual modulations. However, the consequences of these properties for visuomotor transformations are yet incompletely understood. To explore those, we recorded short-latency ocular following responses in humans to large center-only and center-surround stimuli. We found that eye movements are triggered by a mechanism that integrates motion over a restricted portion of the visual field, the size of which depends on stimulus contrast and increases as a function of time after response onset. We also found evidence for a strong nonisodirectional center-surround organization, responsible for normalizing the central, driving input so that motor responses are set to their most linear contrast dynamics. Such response normalization is delayed about 20 ms relative to tracking onset, gradually builds up over time, and is partly tuned for surround orientation/direction. These results outline the spatiotemporal organization of a behavioral receptive field, which might reflect a linear integration among subpopulations of cortical visual motion detectors.

This article has been cited by other articles:

				M. Spering and K. R. Gegenfurtner Contextual Effects on Smooth-Pursuit Eye Movements J Neurophysiol, February 1, 2007; 97(2): 1353 - 1367. [Abstract] [Full Text] [PDF]