保持运动感知和皮层投射到V5的密度在同名的半视障碍中
Witaya Sungkarat1,2, Thana Chaeyklinthes3, Kunlawat Thadanipon4
1Department of Radiology, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok 10400, Thailand.
Brain communications
|December 20, 2024
概括
患有近视症的患者可以感知运动,尽管视野丧失,这种现象与特定的神经通路连接有关. 这项研究揭示了保存的运动感知与连接横向生殖细胞核与视觉区域5的通路密度之间的相关性.
科学领域:
- 神经科学是一个神经科学.
- 眼科医生 眼科 眼科
- 神经成像是一种神经成像.
背景情况:
- 同名视野缺陷是由于影响生殖条纹通路的阴囊后病变造成的.
- 里多克现象描述了完全同名的半视障碍患者对移动刺激的保存意识感知.
- 从侧面生殖细胞核到视觉区域5的直接通道,绕过主要视觉皮层,被假设是这种残留视觉的基础.
研究的目的:
- 为了研究在半视障碍中保存的运动感知与底层神经通路的纤维连接密度之间的相关性.
- 探索里多赫现象所涉及的具体途径.
主要方法:
- 一项涉及48名参与者的病例控制研究 (20名具有同名视野缺陷,28名对照).
- 使用汉弗雷场分析,动力周边测量,脑MRI和扩散张力成像概率曲谱.
- 通过比较动力周长度和汉弗莱场分析结果来量化保存的运动感知.
主要成果:
- 在纤维连接密度 (相反的侧面生殖细胞核到相反的视觉区域5,反之亦然) 和保存的运动知觉之间发现了显著的正相关性.
- 调整后的相关系数 (rho) 为0.5965和0.5635 (P < 0.0012) 对于各自的路径.
- 曲线值下的面积表明在反映连接密度方面表现良好,以保持运动感知.
结论:
- 这项研究提供了第一份报告,将Riddoch现象中的保存运动感知与特定通路的纤维连接密度相关联 (双边侧面生殖细胞核到对侧面视觉区域5).
- 展示了一条广泛的视觉通路网络,通过大脑质体的脏连接半球.
- 该方法为评估和监测患有半视障碍的患者提供了潜力.
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