由大脑刺激和训练诱导的通用学习的神经化学预测因素
Shane E Ehrhardt1, Yohan Wards2, Reuben Rideaux3,4
1School of Psychology, The University of Queensland, St Lucia, Queensland 4072, Australia s.ehrhardt@uq.edu.au.
概括
当技能跨任务转移时,认知增强更有效. 多任务训练与跨直流刺激 (tDCS) 相结合,改善了空间注意力,与大脑谷氨酸水平相关的好处.
科学领域:
- 神经科学是一个神经科学.
- 认知心理学 认知心理学
- 大脑刺激 大脑刺激
背景情况:
- 认知增强方法在对任务进行概括时最具影响力,但这种转移的程度仍在争论中.
- 在认知转移中激发性和抑制性大脑过程的具体作用仍然在很大程度上是未知的.
研究的目的:
- 调查将多任务训练与跨直流刺激 (tDCS) 结合起来是否可以诱导普遍的认知益处.
- 探索tDCS剂量,电极放置和训练任务对认知转移的影响.
- 检查干预前神经化学度 (GABA和谷氨酸) 和认知转移之间的关系.
主要方法:
- 一项涉及人类参与者 (两性) 的大型神经成像研究将多任务训练与多天的tDCS结合起来.
- 多样化的tDCS参数 (1.0对2.0mA,左对右前额叶皮层准) 和训练任务 (多任务对控制).
- 在各种任务中评估认知表现,并使用超高场7T磁共振光谱测量GABA和谷氨酸度.
主要成果:
- 通过视觉搜索性能来衡量空间注意力的普遍改善,当多任务训练与1.0mAtDCS对准左或右前额叶皮层相结合时,观察到.
- 这些转移效应持续了干预后大约30天.
- 在前额叶皮质中训练前的谷氨酸度预测了从右额叶tDCS转移的好处的大小.
结论:
- 结合多任务训练和低剂量 (1.0mA) 前额外横直流刺激,可以有效地增强认知功能,特别是空间注意力.
- 观察到的认知转移是长期的 (∼30天),并且似乎主要由刺激性大脑过程中介导,正如与谷氨酸酸的联系所示.
- 这项研究为优化认知增强策略提供了新的见解,强调了刺激参数和神经化学基础的重要性.
相关概念视频
Long-term Potentiation
55.2K
Long-term potentiation, or LTP, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTP is the process of synaptic strengthening that occurs over time between pre- and postsynaptic neuronal connections. The synaptic strengthening of LTP works in opposition to the synaptic weakening of long-term depression (LTD) and together are the main mechanisms that underlie learning and memory.
55.2K
Higher Mental Functions of Brain: Learning and Memory
758
Memory is one of the most vital higher mental functions of the brain. Memory is closely related to learning because it enables us to retain information and experiences from our past to use them in our present life. It also helps us to remember facts, events, and skills, such as riding a bike or swimming. There are two types of memory — declarative memory, which involves memorizing facts or events, and procedural memory, which enables us to remember how to do something like writing or...
758
Neuroplasticity
344
Neuroplasticity reflects the brain's remarkable capacity to adapt and evolve, responding dynamically to learning, experiences, or injury by reorganizing its neural circuitry. This reorganization involves creating new neural connections and refining old ones through a series of biological processes that contribute to the brain's lifelong development and adaptability.
344


