Perception of the consequences of self-action is temporally tuned and event driven
Perception of the consequences of self-action is temporally tuned and event driven
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DOI：
10.1016/j.cub.2005.05.023
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发表时间：
2005-06-21
期刊：
影响因子：
9.2
通讯作者：
Flanagan, JR
中科院分区：
文献类型：
--
作者：
Bays, PM;Wolpert, DM;Flanagan, JR
有人提出，为了增加具有外部原因的感觉的显著性，基于自己的动作可预测的感觉被减弱[1，2]。这可以解释为什么自我施加的搔痒[3，4]或恒定的力量[5]被认为不如外部施加的相同刺激强烈。在这里，受试者用他们的右手食指敲击安装在他们左手食指上方的力传感器。当电机与右手轻击同步地在左手手指上产生轻击时，模拟手指之间的接触，与休息期间经历的相同轻击相比，左手手指对力的感知会减弱。随着左拍相对于右拍延迟或提前，衰减逐渐减小。然而，对于由停止在传感器上方或通过传感器上方的右手手指运动触发的左轻击，没有看到衰减。我们的结论是，有一个窗口的感觉衰减，是广泛的时间调谐和集中的时间，手指通常会接触。也就是说，预测性触觉衰减与运动引起的特定外部事件有关，而不是与运动本身有关。
It has been proposed that in order to increase the salience of sensations with an external cause, sensations that are predictable based on one's own actions are attenuated [1, 2]. This may explain why self-imposed tickle [3, 4] or constant forces [5] are perceived as less intense than the same stimuli externally imposed. Here, subjects used their right index finger to tap a force sensor mounted above their left index finger. When a motor generated a tap on the left finger synchronously with the right tap, simulating contact between the fingers, the perception of force in the left finger was attenuated compared to the same tap experienced during rest. Attenuation gradually reduced as the left tap was either delayed or advanced relative to the active right tap. However, no attenuation was seen to left taps triggered by right-finger movements that stopped above or passed wide of the sensor. We conclude that there is a window of sensory attenuation that is broadly temporally tuned and centered on the time at which the fingers would normally make contact. That is, predictive tactile sensory attenuation is linked to specific external events arising from movement rather than to the movement per se.