在左侧视觉刺激过程中,右半球下侧顶叶片的侧面化α振荡活动向右半球转移
Marino Iwakiri1, Yuhi Takeo2, Takashi Ikeda3
1Department of Rehabilitation, Oita University Hospital, Oita, Japan; Graduate School of Welfare and Health Science, Oita University, Oita, Japan.
Neuropsychologia
|October 23, 2024
概括
对左视野的空间注意力依赖于右半球在下叶 (IPL) 的活动. 这与向右的注意力形成鲜明对比,这表明阿尔法振荡中没有特定的半球主导地位.
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
- 神经学 神经学
背景情况:
- 单边空间忽视 (USN) 病原体与空间注意力缺陷有关.
- 连接空间注意力和USN的精确神经机制尚未完全理解.
- 研究空间注意力的半球差异是理解USN的关键.
研究的目的:
- 为了比较左脑和右脑半球之间的空间注意力的神经机制.
- 阐明阿尔法振荡活动在半球空间注意力的横向化中的作用.
- 为了提供对半空间疏忽的神经支的见解.
主要方法:
- 20名健康的志愿者执行了一项手头旋转任务.
- 视觉刺激 (手的图像) 在中心固定点周围的各个位置呈现.
- 计算了α振荡活动的侧面性指数,以评估神经活动侧面化.
主要成果:
- 在左侧视觉刺激期间,在下叶 (IPL) 中观察到对右半球的α振荡神经活动显著转移.
- 在IPL中没有检测到右侧视觉刺激的alpha振荡活性显著的半球变化.
- 向左的空间注意力具体取决于右IPLα活动.
结论:
- 面向左视野的空间注意力严重依赖于IPL内的右半球振荡α活动.
- 向右的空间注意力在阿尔法带活动中没有表现出类似的半球专业化.
- 这些发现为空间注意力和半空间忽视的神经基础提供了重要的见解.
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