Role of uncertainty in sensorimotor control

被引:173
作者
van Beers, RJ [1 ]
Baraduc, P [1 ]
Wolpert, DM [1 ]
机构
[1] UCL, Sobell Dept Motor Neurosci & Movement Disorders, Inst Neurol, London WC1N 3BG, England
关键词
noise; uncertainty; motor control; motor planning; multisensory integration;
D O I
10.1098/rstb.2002.1101
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
Neural signals are corrupted by noise and this places limits on information processing. We review the processes involved in goal-directed movements and how neural noise and uncertainty determine aspects of our behaviour. First, noise in sensory signals limits perception. We show that, when localizing our hand, the central nervous system (CNS) integrates visual and proprioceptive information, each with different noise properties, in a way that minimizes the uncertainty in the overall estimate. Second, noise in motor commands leads to inaccurate movements. We review an optimal-control framework, known as 'task optimization in the presence of signal-dependent noise', which assumes that movements are planned so as to minimize the deleterious consequences of noise and thereby minimize inaccuracy. Third, during movement, sensory and motor signals have to be integrated to allow estimation of the body's state. Models are presented that show how these signals are optimally combined. Finally, we review how the CNS deals with noise at the neural and network levels. In all of these processes, the CNS carries out the tasks in such a way that the detrimental effects of noise are minimized. This shows that it is important to consider effects at the neural level in order to understand performance at the behavioural level.
引用
收藏
页码:1137 / 1145
页数:9
相关论文
共 70 条
[61]  
vanVreeswijk C, 1996, SCIENCE, V274, P1724, DOI 10.1126/science.274.5293.1724
[62]  
von Helmholtz H., 1867, Handbuch der physiologischen optik, VIII
[63]   DAS REAFFERENZPRINZIP - (WECHSELWIRKUNGEN ZWISCHEN ZENTRALNERVENSYSTEM UND PERIPHERIE) [J].
VONHOLST, E ;
MITTELSTAEDT, H .
NATURWISSENSCHAFTEN, 1950, 37 (20) :464-476
[64]   INTER-MODAL ORGANIZATION - A METHODOLOGICAL LOCALIZATION STUDY [J].
WARREN, DH ;
SCHMITT, TL .
PERCEPTUAL AND MOTOR SKILLS, 1980, 50 (03) :1111-1118
[65]   PRELIMINARY OBSERVATIONS ON TICKLING ONESELF [J].
WEISKRANTZ, L ;
ELLIOTT, J ;
DARLINGTON, C .
NATURE, 1971, 230 (5296) :598-+
[66]  
Welch R. B, 1978, PERCEPTUAL MODIFICAT
[67]  
Welch RB, 1986, Sensory Processes and Perception, V1
[68]   AN INTERNAL MODEL FOR SENSORIMOTOR INTEGRATION [J].
WOLPERT, DM ;
GHAHRAMANI, Z ;
JORDAN, MI .
SCIENCE, 1995, 269 (5232) :1880-1882
[69]  
WOLPERT DM, 2001, SOC NEUR ABSTR, V27, P71
[70]   Probabilistic interpretation of population codes [J].
Zemel, RS ;
Dayan, P ;
Pouget, A .
NEURAL COMPUTATION, 1998, 10 (02) :403-430