Tracking with the mind's eye

被引:97
作者
Krauzlis, RJ
Stone, LS
机构
[1] Salk Inst Biol Studies, La Jolla, CA 92037 USA
[2] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA
关键词
D O I
10.1016/S0166-2236(99)01464-2
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
The two components of voluntary tracking eye-movements in primates, pursuit and saccades, are generally viewed as relatively independent oculomotor subsystems that move the eyes in different ways using independent visual information. Although saccades have long been known to be guided by visual processes related to perception and cognition, only recently have psychophysical and physiological studies provided compelling evidence that pursuit is also guided by such higher-order visual processes, rather than by the raw retinal stimulus. Pursuit and saccades also do not appear to be entirely independent anatomical systems, but involve overlapping neural mechanisms that might be important for coordinating these two types of eye movement during the tracking of a selected visual object. Given that the recovery of objects from real-world images is inherently ambiguous, guiding both pursuit and saccades with perception could represent an explicit strategy for ensuring that these two motor actions are driven by a single visual interpretation.
引用
收藏
页码:544 / 550
页数:7
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