醒着的子中的视觉皮质神经元:受体场和驱动单突触的甲状腺皮层输入
Chuyi Su1, Rosangela F Mendes-Platt1, Jose-Manuel Alonso1,2
1Department of Psychological Sciences, University of Connecticut, Storrs, Connecticut.
概括
视觉皮层中的皮质神经元表现出多样化的受体场结构,影响视觉处理. 确定了一条快速通往上结肠的thalamic通道,可能会增强视觉信息传输.
科学领域:
- 神经科学是一个神经科学.
- 视觉皮层 视觉皮层
- 高级结体 (Superior Colliculus) 是一个较高的结体.
背景情况:
- 上部结核从视觉皮层的皮质神经元中获得了重要的输入.
- 由于对它们的反应特性和连接性的知识有限,这些皮质神经元的确切功能尚未完全理解.
研究的目的:
- 为了研究响应特性,受体场结构和皮质结构神经元的连接性.
- 在清醒的子中,对已识别的皮质神经元的轴突导电时间和乳头输入进行表征.
主要方法:
- 利用抗的方法在醒着的雄性和雌性子中识别皮质结构神经元.
- 测量了轴突导电时间,乳头输入和受感场属性,使用正弦漂移.
主要成果:
- 在皮质结构神经元中确定了三种不同的ON-OFF受体场结构 (Cx,S2,S1),表明空间整合的异质性.
- Cx型神经元表现出快速导电,高自发活性和强烈的视觉反应;S2型神经元表现出高的方向选择性;S1型神经元具有缓慢导电.
- 发现了一条快速导导的甲状腺介导的皮质结膜通路,主要涉及Cx型神经元,提供直接输入到上层结膜.
结论:
- 皮质神经元显示同质的非线性空间总和,但异质的开关输入集成.
- 一条从 thalamus 到 superior colliculus 的新型,快速的皮质结构通路可能专门用于快速的视觉信息传输.
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