在左撇子和右撇子中,手和工具知觉的半球不对称,已知语言占主导地位
Emma M Karlsson1, David P Carey2
1Institute of Cognitive Neuroscience, School of Psychology and Sport Science, Bangor University, Bangor, UK; Department of Experimental Clinical and Health Psychology, Ghent University, Ghent, Belgium.
Neuropsychologia
|March 1, 2024
概括
大多数个体的工具大脑区域侧向于语言主导半球. 手的感知显示没有明确的半球偏差. 工具表示是复杂的,受语言和运动控制的影响.
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
- 神经成像是一种神经成像.
背景情况:
- 对手和工具有选择性的大脑区域在右撇子中往往是左侧的.
- 在左撇子中,与工具相关的功能也可能依赖于左半球,尽管右半球控制主导手.
- 这表明了复杂的运动序列的潜在超级控制系统,包括语音和工具使用.
研究的目的:
- 研究左撇子和右撇子个体对手和工具感知的半球专业化.
- 为了检查左半球对工具感知的专业化是否延伸到左撇子.
- 探索语言主导对左撇子与右半球语言主导对工具感知不对称的影响.
主要方法:
- 用神经成像技术研究大脑活动.
- 参与者包括右撇子和左撇子,不同的语言占主导地位.
- 展示了手和工具的视觉刺激,以评估感知侧向化.
主要成果:
- 工具显示大多数右撇子的左半球侧面化,左半球语言占主导地位.
- 在右半球语言主导的左撇子中,工具侧向语言主导半球.
- 左右半球语言主导的左撇子在工具横向化方面表现出不同的结果,没有明显的半球偏差.
- 在任何测试组中,手的感知都没有显示出显著的组级不对称性.
结论:
- 工具感知侧面化是复杂的,受到语言主导和控制主导手的半球的影响.
- 手和工具表示的半球重叠比以前认为的要复杂得多.
- 工具的视觉处理可能部分由语言网络和运动控制侧面化驱动.
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