Startle stimuli reduce the internal model control in discrete movements.
Startle stimuli reduce the internal model control in discrete movements.
复制标题
惊吓刺激会降低离散运动中的内部模型控制。
DOI：
10.1109/iembs.2009.5332766
复制
发表时间：
2009
期刊：
影响因子：
--
通讯作者：
Patton,JamesL
中科院分区：
文献类型：
--
作者：
Wright,ZacharyA;Rogers,MarkW;MacKinnon,ColumD;Patton,JamesL
A well known and major component of movement control is the feedforward component, also known as the internal model. This model predicts and compensates for expected forces seen during a movement, based on recent experience, so that a well-learned task such as reaching to a target can be executed in a smooth straight manner. It has recently been shown that the state of preparation of planned movements can be tested using a startling acoustic stimulus (SAS). SAS, presented 500, 250 or 0 ms before the expected ldquogordquo cue resulted in the early release of the movement trajectory associated with the after-effects of the force field training (i.e. the internal model). In a typical motor adaptation experiment with a robot-applied force field, we tested if a SAS stimulus influences the size of after-effects that are typically seen. We found that in all subjects the after-effect magnitudes were significantly reduced when movements were released by SAS, although this effect was not further modulated by the timing of SAS. Reduced after-effects reveal at least partial existence of learned preparatory control, and identify startle effects that could influence performance in tasks such as piloting, teleoperation, and sports.
