经颅交流电刺激对运动技能学习与巩固的作用

Effect of tACS on Motor Skill Learning and Consolidation

经颅交流刺激(transcranial alternating current stimulation,tACS)是一种非侵入性的脑刺激方法,可调节电极下皮质区域的振荡神经活动。对初级运动皮层(primary motor cortex,M1)进行tACS可以增强运动学习记忆。研究了应用于M1的tACS对运动学习技能和巩固的影响。一组年轻的健康成年人在tACS前后,用右手进行了序列反应时任务(serial reaction time task,SRTT)。每个参与者都接受了3次刺激,分别是假刺激、β波段(20 Hz-tACS)和γ波段(70 Hz-tACS)刺激。研究测量了刺激对一般运动技能(general motor skill,GMS)和序列特异性技能(sequence-specific skill,SS)学习与巩固的影响。结果表明,β-tACS和γ-tACS均改善了GMS和SS的巩固。相比之下,两种技能巩固在γ-tACS中受益更多,与假刺激相比更显著。

Transcranial alternating current stimulation(tACS) is a non-invasive brain stimulation method, which can regulate the oscillatory nerve activity in the cortical area under the electrode. The tACS on the primary motor cortex(M1) can enhance motor learning and memory in motor learning tasks. Therefore, the impact of tACS applied to M1 on motor learning skills and consolidation was researched. In the experiment, a group of young healthy adults performed the serial reaction time task(SRTT) with their right hands before and after tACS stimulation. Each participant received 3 stimulations, namely: sham stimulation, β-band(20 Hz-tACS) stimulation and γ-band(70 Hz-tACS) stimulation. The impact of stimulation is measured on the learning and consolidation of general motor skills(GMS) and sequence-specific skills(SS). The experimental results show that both β-tACS and γ-tACS improved the consolidation of GMS and SS. In contrast, the consolidation of the two skills benefited more from γ-tACS, which was more significant compared with fake stimulation.