在注意力定向过程中,心跳唤起的潜力在年轻人和老年人身上
Francesca Aprile1, Marco Simões1,2, Jorge Henriques2
1Coimbra Institute for Biomedical Imaging and Translational Research (CIBIT), Institute for Nuclear Sciences Applied to Health (ICNAS), University of Coimbra, Coimbra, Portugal.
心跳唤起的潜力 (HEP) 受自发间拍间隔 (IBI) 波动的影响,而不是警告线索. 虽然HEP振幅与老年人的反应时间相关,但HEP并没有介导注意力.
科学领域:
- 神经科学是一个神经科学.
- 心脏病学 心脏病学
- 心理学 心理学 心理学
背景情况:
- 心跳间隔 (IBI) 随着每次心跳变化而变化,并影响感官灵敏度.
- 警告线索增加IBI (预期性心脏减速) 并改善反应时间.
- 衰老会影响IBI对线索的反应,并减缓反应时间,但调解机制尚不清楚.
研究的目的:
- 调查心跳唤起的潜能 (HEP) 是否受到警告线索和自发IBI波动的影响.
- 探索HEP在调解心脏活动和反应时间之间的关系中的作用,特别是在衰老中.
主要方法:
- 分析了同时进行的脑电图 (EEG) 和心电图 (ECG) 记录.
- 参与者包括年轻人和老年人,他们执行了指引反应时间和去/不去任务.
- 该研究检查了通过警告线索和自发IBI变化的HEP调制.
主要成果:
- 警告线索没有显著改变HEP.
- 自发IBI波动,独立于线索,调制HEP振幅.
- HEP振幅与老年人平均反应时间相关,但试验对试验的反应时间独立于IBI波动.
结论:
- 心跳唤起的潜能对自发的心脏周期变化敏感.
- HEP似乎没有调解注意力定向 (通过警告线索) 对反应时间的影响.
- 心脏皮层相互作用和反应时间的年龄相关差异需要进一步调查.
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