INSERM UMR1093-CAPS, Université de Bourgogne, UFR des Sciences du Sport, Campus Universitaire, BP 27877, 21000, Dijon, France.
Pôle Recherche et Santé Publique, CHU Dijon Bourgogne, 21000, Dijon, France.
Sci Rep. 2024 Sep 27;14(1):22195. doi: 10.1038/s41598-024-69336-0.
Competition between motor and declarative memory systems, both involved simultaneously in motor learning, has been shown to reduce motor consolidation. Here, we investigated this conflict during the learning of a sequential finger-tapping task (SFTT) scheduled for either the morning or the afternoon. Sixty participants, divided into four groups, trained on SFTT at either 10 a.m. or 3 p.m., and retested five hours later. To disrupt the conflict between the two memories, two groups underwent declarative learning immediately after SFTT training, involving word list training (G10 and G3), while the two other groups (G10 and G3) experienced no additional learning. The results revealed that after morning training without additional learning (C10), skill consolidation deteriorated, while the addition of declarative learning (G10) significantly attenuated this decay, stabilizing consolidation. Afternoon training showed skill stabilization for both groups (G3 and G3). These results suggest that weaker consolidation after morning training may be due to an important competition between motor and declarative memories within the same motor task.
运动和陈述性记忆系统之间的竞争，这两个系统都同时参与运动学习，已经被证明会减少运动的巩固。在这里，我们在学习顺序手指敲击任务（SFTT）时调查了这种冲突，该任务安排在上午或下午进行。60 名参与者分为四组，分别在上午 10 点或下午 3 点进行 SFTT 训练，并在 5 小时后进行重新测试。为了打破两种记忆之间的冲突，两组在 SFTT 训练后立即进行陈述性学习，涉及单词列表训练（G10 和 G3），而另外两组（G10 和 G3）没有进行额外的学习。结果表明，在没有额外学习的情况下进行上午训练（C10）后，技能巩固恶化，而加入陈述性学习（G10）则显著减轻了这种衰退，稳定了巩固。下午训练对两组（G3 和 G3）都显示出技能稳定。这些结果表明，上午训练后巩固较弱可能是由于同一运动任务中运动和陈述性记忆之间的重要竞争。
