Jones K E, Wessberg J, Vallbo A
Department of Physiology, Göteborg University, Göteborg, Sweden.
Neuroreport. 2001 Dec 21;12(18):4029-33. doi: 10.1097/00001756-200112210-00035.
Adapting movements in relation to visual feedback is a ubiquitous characteristic of sensorimotor control and involves the integration of multiple sources of sensory information. We recorded sensory feedback from muscle spindle afferents during visuomotor adaptation while subjects performed an aiming task to investigate whether the activity of the muscle spindles was modulated by the fusimotor system under these learning conditions. None of the muscle spindles showed an increase in activity, rather in 83% of the trials the firing rates were decreased. These preliminary results suggest that the CNS reduces the sensory signals arising from muscle spindles perhaps as a means of resolving the conflict between visual and proprioceptive feedback during the task.
根据视觉反馈调整动作是感觉运动控制中普遍存在的特征，涉及多种感觉信息源的整合。我们在视觉运动适应过程中记录了肌肉梭传入纤维的感觉反馈，同时让受试者执行一项瞄准任务，以研究在这些学习条件下肌肉梭的活动是否受肌梭运动系统的调节。没有一个肌肉梭显示出活动增加，相反，在83%的试验中放电率降低。这些初步结果表明，中枢神经系统可能通过减少肌肉梭产生的感觉信号，来解决任务过程中视觉和本体感觉反馈之间的冲突。
