The Location Probability Effects of Saccade Reaction Times Are Modulated in the Frontal Eye Fields but Not in the Supplementary Eye Field

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Title:	The Location Probability Effects of Saccade Reaction Times Are Modulated in the Frontal Eye Fields but Not in the Supplementary Eye Field
Authors:	Liu,CL;Tseng,P;Chiau,HY;Liang,WK;Hung,DL;Tzeng,OJL;Muggleton,NG;Juan,CH
Contributors:	認知與神經科學研究所
Keywords:	TRANSCRANIAL MAGNETIC STIMULATION;DEVELOPING OCULOMOTOR COMMANDS;POSTERIOR PARIETAL CORTEX;THETA-BURST STIMULATION;NEURONAL-ACTIVITY;VISUAL-SEARCH;SUPERIOR COLLICULUS;PERCEPTUAL DECISION;SPATIAL ATTENTION;NEURAL SELECTION
Date:	2011
Issue Date:	2012-03-27 18:22:10 (UTC+8)
Publisher:	國立中央大學
Abstract:	The visual system constantly utilizes regularities that are embedded in the environment and by doing so reduces the computational burden of processing visual information. Recent findings have demonstrated that probabilistic information can override attentional effects, such as the cost of making an eye movement away from a visual target (antisaccade cost). The neural substrates of such probability effects have been associated with activity in the superior colliculus (SC). Given the immense reciprocal connections to SC, it is plausible that this modulation originates from higher oculomotor regions, such as the frontal eye field (FEF) and the supplementary eye field (SEF). To test this possibility, the present study employed theta burst transcranial magnetic stimulation (TMS) to selectively interfere with FEF and SEF activity. We found that TMS disrupted the effect of location probability when TMS was applied over FEF. This was not observed in the SEF TMS condition. Together, these 2 experiments suggest that the FEF plays a critical role not only in initiating saccades but also in modulating the effects of location probability on saccade production.
Relation:	CEREBRAL CORTEX
Appears in Collections:	[College of Science Institute of Cognitive Neuroscience] journal & Dissertation

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