复杂的视觉区分在右侧,但不是左侧,前叶切除术后受损
Jeremy Gardette1, Chrystèle Mosca2, Cassandra Asien1,2
1LPNC, CNRS, UMR 5105, Université Grenoble Alpes, Université Savoie Mont Blanc, Grenoble, France.
Hippocampus
|July 24, 2023
概括
对右侧中叶 (MTL) 的损伤会损害复杂的视觉感知,特别是在模两可的刺激时. 左MTL损伤没有影响这些视觉能力,这表明右侧处理.
科学领域:
- 神经科学是一个神经科学.
- 认知神经科学 认知神经科学
- 神经心理学 神经心理学
背景情况:
- 中间叶 (MTLs) 传统上与声明性记忆有关.
- 新出现的证据表明,MTL是专门处理特定表示的,无论认知领域.
- 以前的研究表明,双边的MTL损伤影响复杂的视觉感知,但单边的影响不太了解.
研究的目的:
- 调查单边中叶 (MTL) 损伤对复杂视觉能力的影响.
- 为了确定MTL中的视觉表示专业化是否是横向的.
主要方法:
- 对左侧 (N=12) 或右侧 (N=8) 前叶切除术的患者和38名健康对照进行视觉匹配任务.
- 刺激视角被操纵以创造特征模两可,增加任务难度.
- 通过准确性和响应时间来评估性能.
主要成果:
- 患有左MTL损伤的患者在所有疾病中表现类似于对照组.
- 与对照组和左侧受损患者相比,患有右侧MTL损伤的患者的准确性显著降低,反应时间增加.
- 右侧受损患者的准确性降至随机水平,具有高特征模两可,特别是在场景和建筑等复杂刺激方面.
结论:
- 由MTL支持的复杂的视觉表示功能似乎是右侧的.
- 这些发现挑战了传统的观点,认为MTL仅用于声明性记忆,并建议特定于域的横向化角色.
- 需要进一步的研究来了解左MTL的代表性功能.
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