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相关概念视频

Facial Feedback Hypothesis01:24

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Charles Darwin proposed that facial expressions are an evolutionary adaptation for communication. He argued that these expressions are not influenced by culture but are universal across species. For example, a snarling expression with exposed teeth signals a threat in many animals, including humans. Darwin also suggested that displaying an emotion can intensify the feeling. Smiling, for example, could enhance one's sense of happiness. This idea laid the foundation for understanding the role...
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相关实验视频

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How to Create and Use Binocular Rivalry
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是否V1反应抑制启动双眼竞争?

Brock M Carlson1, Blake A Mitchell1, Kacie Dougherty1,2

  • 1Department of Psychology, College of Arts and Science, Vanderbilt Vision Research Center, Center for Integrative and Cognitive Neuroscience, Vanderbilt University, Nashville, TN 37235, USA.

iScience
|July 31, 2023
PubMed
概括

双眼竞争 (BR) 涉及只能感知一只眼睛的视角. 这项研究发现,一种变体,双眼竞争闪光抑制 (BRFS),在初级视觉皮层 (V1) 神经元中引起反应促进,而不是抑制,这表明了另一种BR启动机制.

关键词:
细胞神经科学 细胞神经科学感官神经科学是一种神经科学.

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科学领域:

  • 神经科学是一个神经科学.
  • 视觉感知 视觉感知 视觉感知
  • 计算神经科学是一种神经科学.

背景情况:

  • 双筒眼竞争 (BR) 是一种现象,只有一只眼睛的视觉输入被同时感知.
  • 启动BR的神经机制,特别是在初级视觉皮层 (V1) 中,仍在研究中.
  • 以前的假设表明V1神经元反应抑制是BR发病的关键触发因素.

研究的目的:

  • 调查V1神经元活动变化在启动BR中的作用.
  • 测试假设V1反应抑制是BR启动所需的.
  • 通过修改的BR范式来探索BR启动的替代机制.

主要方法:

  • 利用双眼对抗闪光抑制 (BRFS),这是BR的一个变体,刺激之间有时间延迟.
  • 在BRFS期间记录了两只的V1神经元尖端活动.
  • 将BRFS期间的神经元反应与已建立的BR模型进行比较.

主要成果:

  • 在大多数V1神经元中,BRFS诱导了响应促进,而不是抑制.
  • 一部分V1神经元由于异步刺激呈现的适应性影响而表现出减少的反应.
  • 这些发现挑战了广泛的V1反应抑制对BR启动的必要性.

结论:

  • 广泛的V1反应抑制对于启动双眼竞争并非必不可少.
  • 在V1神经元的一个子集中选择性反应抑制可能作为BR的另一个触发因素.
  • 这些发现为基础视觉竞争和感知的神经动态提供了新的见解.