Secondary adaptation of memory-guided saccades

被引:11
作者
Srimal, Riju [1 ]
Curtis, Clayton E. [1 ,2 ]
机构
[1] NYU, Dept Psychol, New York, NY 10003 USA
[2] NYU, Ctr Neural Sci, New York, NY 10003 USA
关键词
Learning; Memory-guided saccade; Oculomotor; Adaptation; FRONTAL EYE FIELD; MOTOR CONTROL; REACTION-TIMES; MOVEMENTS; CORTEX; INACTIVATION; POPULATIONS; MECHANISMS; SYSTEMS; LESIONS;
D O I
10.1007/s00221-010-2394-0
中图分类号
Q189 [神经科学];
学科分类号
071006 ;
摘要
Adaptation of saccade gains in response to errors keeps vision and action co-registered in the absence of awareness or effort. Timing is key, as the visual error must be available shortly after the saccade is generated or adaptation does not occur. Here, we tested the hypothesis that when feedback is delayed, learning still occurs, but does so through small secondary corrective saccades. Using a memory-guided saccade task, we gave feedback about the accuracy of saccades that was falsely displaced by a consistent amount, but only after long delays. Despite the delayed feedback, over time subjects improved in accuracy toward the false feedback. They did so not by adjusting their primary saccades, but via directed corrective saccades made before feedback was given. We propose that saccade learning may be driven by different types of feedback teaching signals. One teaching signal relies upon a tight temporal relation with the saccade and contributes to obligatory learning independent of awareness. When this signal is ineffective due to delayed error feedback, a second compensatory teaching signal enables flexible adjustments to the spatial goal of saccades and helps maintain sensorimotor accuracy.
引用
收藏
页码:35 / 46
页数:12
相关论文
共 33 条
[1]  
ALBUS J S, 1971, Mathematical Biosciences, V10, P25, DOI 10.1016/0025-5564(71)90051-4
[2]   The control of saccadic adaptation: implications for the scanning of natural visual scenes [J].
Bahcall, DO ;
Kowler, E .
VISION RESEARCH, 2000, 40 (20) :2779-2796
[3]  
Becker W., 1989, NEUROBIOLOGY SACCADI, P13
[4]   SACCADIC REACTION-TIMES IN PATIENTS WITH FRONTAL AND PARIETAL LESIONS [J].
BRAUN, D ;
WEBER, H ;
MERGNER, T ;
SCHULTEMONTING, J .
BRAIN, 1992, 115 :1359-1386
[5]   Modeling sensorimotor learning with linear dynamical systems [J].
Cheng, S ;
Sabes, PN .
NEURAL COMPUTATION, 2006, 18 (04) :760-793
[6]   Prefrontal and parietal contributions to spatial working memory [J].
Curtis, CE .
NEUROSCIENCE, 2006, 139 (01) :173-180
[7]   The effects of prefrontal lesions on working memory performance and theory [J].
Curtis C.E. ;
D'Esposito M. .
Cognitive, Affective, & Behavioral Neuroscience, 2004, 4 (4) :528-539
[8]   SEPARATE ADAPTIVE-MECHANISMS FOR THE CONTROL OF REACTIVE AND VOLITIONAL SACCADIC EYE-MOVEMENTS [J].
DEUBEL, H .
VISION RESEARCH, 1995, 35 (23-24) :3529-3540
[9]  
Deubel H, 1999, ATTENTION PERFORM, V17, P697
[10]   Muscimol-induced inactivation of monkey frontal eye field: Effects on visually and memory-guided saccades [J].
Dias, EC ;
Segraves, MA .
JOURNAL OF NEUROPHYSIOLOGY, 1999, 81 (05) :2191-2214