在双边背后壁膜损伤后,反形终点中的空间偏差
Julie Ouerfelli-Ethier1,2, Romain Fournet2, Aarlenne Z Khan2
1Université Claude Bernard Lyon 1, CNRS, INSERM, Centre de Recherche en Neurosciences de Lyon CRNL, Trajectoires, France.
The European journal of neuroscience
|July 28, 2023
概括
反斜动眼动显示对视觉目标的偏差,表明目标和目标位置之间的竞争. 背后壁膜皮层 (PPC) 在解决这种空间竞争方面发挥着作用.
科学领域:
- 神经科学是一个神经科学.
- 眼科医生 眼科 眼科
- 认知科学 认知科学
背景情况:
- 反斜动是一种反射式的眼动,是远离视觉刺激的.
- 这些运动往往是低度的,这意味着它们没有达到预期的目标.
- 这种虚度可能源于视觉目标和预期的萨卡德目标之间的空间竞争.
研究的目的:
- 为了研究在反顺序生成中的空间竞争假设.
- 为了确定抗冲动测量是否反映了对视觉目标的偏差.
- 探索背后壁膜皮层 (PPC) 在解决这种空间竞争中的作用.
主要方法:
- 测试了10名健康受试者在三个不同空间配置 (90°相同的半球场,90°不同的半球场,180°) 的三种反冲动任务中.
- 检查了saccade终点,以证明视觉目标干扰的证据.
- 评估了一名患有双边背部PPC病变的患者在相同的反冲击任务上.
主要成果:
- 所有参与者都表现出对所有配置的视觉目标的反冲动终点的空间偏差.
- 这种偏差表明,在反冲击计划和执行过程中,视觉目标位置的抑制不完全.
- 在患有背部PPC病变的患者中,空间偏差更为明显.
结论:
- 反冲动测量与对视觉目标的空间偏差有关,支持竞争假说.
- 背部的PPC对于在反-saccade任务中整合竞争的空间表示至关重要.
- 视觉目标的不完全抑制有助于观察到反动行为中的偏差.
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