双边连接从杏仁体到外层视觉皮层在马尔莫塞特子的双边连接
Sadaf Teymornejad1, Piotr Majka2, Katrina H Worthy1
1Department of Physiology and Neuroscience Program, Biomedicine Discovery Institute, Monash University, 26 Innovation Walk, Clayton, Melbourne, VIC 3800, Australia.
Cerebral cortex (New York, N.Y. : 1991)
|September 3, 2024
概括
灵长类动物的杏仁体向视觉皮质的两侧视觉皮质 (ipsilateral visual cortex) 展开,包括早期视觉区域. 它还向更高层次的视觉区域发送较小但显著的对侧投影,从而影响相反视野中的处理.
科学领域:
- 神经科学是一个神经科学.
- 灵长类的视觉系统
背景情况:
- 灵长类动物的杏仁体与众多的皮层区域相连.
- 杏仁体与对侧视觉皮层的连接程度尚不清楚.
研究的目的:
- 为了研究杏仁体到外层皮质的ipsilateral和contralateral投射,在子子.
- 确定这些投影所针对的特定视觉区域以及相关的路径.
主要方法:
- 逆行标记剂注射到子大脑中.
- 对桃体和外层皮层中标记标记神经元的分析.
- 体注射,以追踪半球间的连接.
主要成果:
- 桃体在很大程度上投射到ipsilateral外层皮质,包括V1和背部/腹部视觉流.
- 在外层区域 (不包括V1) 观察到来自底侧核综合体的逆侧投影.
- 反侧连接的数量较少 (1.25.8%),但随着层次视觉处理水平的增加而增加.
- 一些桃体-皮质连接通过大脑体 (corpus callosum) 穿过中线.
结论:
- 杏仁体影响侧面和逆侧面的外层视觉处理.
- 这些发现揭示了情感刺激的途径,以调节在对侧视野中的早期神经处理.
- 这扩大了我们对桃体流体投射及其在视觉信息处理中的作用的理解.
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