The parallel programming of voluntary and reflexive saccades

被引:54
作者
Walker, Robin [1 ]
McSorley, Eugene
机构
[1] Univ London, Royal Holloway & Bedford New Coll, Dept Psychol, Egham TW20 0EX, Surrey, England
[2] Univ Reading, Dept Psychol, Reading RG6 6AH, Berks, England
关键词
saccades; superior colliculus; frontal eye fields; parallel processing; parallel programming;
D O I
10.1016/j.visres.2005.12.009
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
A novel two-step paradigm was used to investigate the parallel programming of consecutive, stimulus-elicited ('reflexive') and endogenous ('voluntary') saccades. The mean latency of voluntary saccades, made following the first reflexive saccades in two-step conditions, was significantly reduced compared to that of voluntary saccades made in the single-step control trials. The latency of the first reflexive saccades was modulated by the requirement to make a second saccade: first saccade latency increased when a second voluntary saccade was required in the opposite direction to the first saccade, and decreased when a second saccade was required in the same direction as the first reflexive saccade. A second experiment confirmed the basic effect and also showed that a second reflexive saccade may be programmed in parallel with a first voluntary saccade. The results support the view that voluntary and reflexive saccades can be programmed in parallel on a common motor map. (c) 2006 Elsevier Ltd. All rights reserved.
引用
收藏
页码:2082 / 2093
页数:12
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