Sensory prediction errors, not performance errors, update memories in visuomotor adaptation.

Sensory prediction errors, not performance errors, update memories in visuomotor adaptation.
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DOI:
10.1038/s41598-018-34598-y
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发表时间:
2018-11-07
期刊:
影响因子:
4.6
通讯作者:
Schweighofer N
Schweighofer N
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Lee K;Oh Y;Izawa J;Schweighofer N

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感觉预测错误被认为在运动适应中更新记忆,但操作错误的作用在很大程度上是未知的。为了分离这些错误,我们在视觉运动旋转的快速射击动作中操纵了视觉反馈。参与者被指示在四种情况中的一种情况下通过向邻近目标射击来策略性地纠正性能错误:运动开始后,主要目标、邻近目标、两个目标都消失,或者没有一个目标消失。在所有情况下,参与者都经历了偏离战略之后的主要目标。在显示主要目标的情况下,参与者经常试图通过产生纠正性动作来尽量减少漂移造成的性能错误。然而,尽管在不同条件的适应过程中表现不同,延迟洗出区块中的记忆衰退在不同条件之间是无法区分的。因此,我们的结果表明,在视觉运动适应中,感觉预测错误而不是操作错误更新了运动记忆中缓慢的、暂时稳定的成分。
Sensory prediction errors are thought to update memories in motor adaptation, but the role of performance errors is largely unknown. To dissociate these errors, we manipulated visual feedback during fast shooting movements under visuomotor rotation. Participants were instructed to strategically correct for performance errors by shooting to a neighboring target in one of four conditions: following the movement onset, the main target, the neighboring target, both targets, or none of the targets disappeared. Participants in all conditions experienced a drift away from the main target following the strategy. In conditions where the main target was shown, participants often tried to minimize performance errors caused by the drift by generating corrective movements. However, despite differences in performance during adaptation between conditions, memory decay in a delayed washout block was indistinguishable between conditions. Our results thus suggest that, in visuomotor adaptation, sensory predictions errors, but not performance errors, update the slow, temporally stable, component of motor memory.
与短期运动学习的不同时间尺度的自适应过程。
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