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566982 occurrences (No.17 in the rank) during 5 years in the PubMed. [cache]
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566982 occurrences (No.17 in the rank) during 5 years in the PubMed. [cache]
| 359) Importantly, these neurophysiological effects were not observed after motor practice without learning or after a temporal delay. |
| PMID:34375797 DOI:10.1016/j.cortex.2021.06.014 |
| 2021 Cortex; a journal devoted to the study of the nervous system and behavior |
| * Training at asymptote stabilizes motor memories by reducing intracortical excitation. |
| - Learning similar motor skills in close succession is limited by interference, a phenomenon that takes place early after acquisition when motor memories are unstable. Interference can be bidirectional, as the first memory can be disrupted by the second (retrograde interference), or the second memory can be disrupted by the first (anterograde interference). The heightened plastic state of primary motor cortex after learning is thought to underlie interference, as unstable motor memories compete for neural resources. While time-dependent consolidation processes reduce interference, the passage of time (~6 h) required for memory stabilization limits our capacity to learn multiple motor skills at once. Here, we demonstrate in humans that prolonged training at asymptote of an initial motor skill reduces both retrograde and anterograde interference when a second motor skill is acquired in close succession. Neurophysiological assessments via transcranial magnetic stimulation reflect this online stabilization process. Specifically, excitatory neurotransmission in primary motor cortex increased after short training and decreased after prolonged training at performance asymptote. Of note, this reduction in intracortical excitation after prolonged training was proportional to better skill retention the following day. Importantly, these neurophysiological effects were not observed after motor practice without learning or after a temporal delay. Together, these findings indicate that prolonged training at asymptote improves the capacity to learn multiple motor skills in close succession, and that downregulation of excitatory neurotransmission in primary motor cortex may be a marker of online motor memory stabilization. |
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--- WordNet output for effects ---