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) Alert me when this article is cited Alert me if a correction is posted Services 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 Google Scholar Google Scholar Articles by Berger, A. Articles by Henik, A. Search for Related Content PubMed PubMed Citation Articles by Berger, A. Articles by Henik, A.

The Endogenous Modulation of IOR is Nasal-Temporal Asymmetric

Ben-Gurion University of the Negev and The Zlotowski Center for Neuroscience, Israel

Corresponding author

Inhibition of return (IOR) refers to a reflexive mechanism mediated by phylogenetically primitive extrageniculate visuomotor pathways, which apparently serves to favor novel spatial locations by inhibiting those recently sampled. We demonstrate an asymmetry between temporal and nasal hemifields in the strategic modulation of IOR by endogenously controlled attention. Exogenous and endogenous precues were manipulated independently on each trial such that precues to initiate endogenous spatial orienting were presented after IOR had been activated by exogenous visual signals. Both types of precues manifested their characteristic effects on reaction time (RT) to detect subsequent targets: facilitation by endogenous precues, and IOR by exogenous precues. Under monocular viewing, an asymmetric interaction between these two mechanisms was observed. While endogenous allocation of attention to the nasal hemifield reduced IOR, no endogenous modulation of IOR was present in the temporal hemifield where the effects of the two types of precues were independent. These observations suggest a framework for understanding the neurobiology of automaticity and control—from an evolutionary perspective.

This article has been cited by other articles:

				A. Bompas, T. Sterling, R. D. Rafal, and P. Sumner Naso-Temporal Asymmetry for Signals Invisible to the Retinotectal Pathway J Neurophysiol, July 1, 2008; 100(1): 412 - 421. [Abstract] [Full Text] [PDF]