体在无意识视觉中的作用
Javier Sanchez-Lopez1, Nicolo Cardobi2, Giorgia Parisi3
1Escuela Nacional de Estudios Superiores Unidad Juriquilla, Universidad Nacional Autonoma de Mexico, Queretaro, Mexico; Department of Neuroscience, Biomedicine and Movement, University of Verona, Italy.
Neuropsychologia
|February 24, 2024
概括
体 (Callosum) 在低视患者的无意识视觉中发挥作用. 它的结构和功能性质与视觉检测和盲目领域的意识相关,这表明半球间通信有助于恢复.
科学领域:
- 神经科学是一个神经科学.
- 神经成像是一种神经成像.
- 视觉感知 视觉感知 视觉感知
背景情况:
- 无意识的视觉触发行为在皮质失明中已知.
- 通过体 (CC) 进行半球间通信在无意识视觉中的作用尚未被探索.
- 半视,一种皮质失明的形式,影响视野感知.
研究的目的:
- 为了研究大脑体 (CC) 属性与无意识/部分意识视力之间的关系.
- 通过概率曲谱 (PT) 评估CC的结构性和功能性特征如何与视觉表现和视觉领域的意识有关.
- 探索CC在处理向受影响的半球场呈现的视觉信息中的作用.
主要方法:
- 在MRI数据上进行概率性通道图 (PT) 来分析,体和脏中的CC纤维特性 (FA值).
- 在使用视觉刺激在完整和盲 Hemifields 的运动和定位歧视任务上对 12 个半视盲患者进行行为测试.
- 在近视患者和健康对照组之间比较CC特性.
主要成果:
- 与对照组相比,红眼患者在所有CC部分表现出较低的分数异构 (FA) 值.
- 在完整的半球场中,PT值与视觉检测/区分精度有显著的相关性.
- 在盲人半球场中,感知意识与运动检测的CC PT值相关,并且根据检测性能和意识观察到差异.
- 在有机会检测的患者和没有机会检测的患者之间,以及在有和没有感知意识的患者之间,CC特性存在显著差异.
结论:
- 体 (CC) 纤维的特性与无意识的刺激检测和部分感知意识有关,在盲人 Hemifield 的 hemianopia 患者.
- 通过CC进行半球间信息交换对于处理受影响视野中的视觉信息至关重要.
- 这些发现突显了CC在治疗半视障碍的潜在恢复方面的重要性.
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