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Updated: Sep 9, 2025

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精神病中的中心-周围处理

Samantha A Montoya1, Hannah R Moser2, Rohit S Kamath2

  • 1Graduate Program in Neuroscience, University of Minnesota, Minneapolis, MN.

medRxiv : the preprint server for health sciences
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概括
此摘要是机器生成的。

患有精神病的人会出现视觉处理变化, 这表明大脑处理视觉背景的细微差别,

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科学领域:

  • 神经科学
  • 视觉感知
  • 心理病理学

背景情况:

  • 患有精神病态 (PwPP) 的人表现出改变的视觉感知.
  • 对比环境抑制是一种视觉错觉,其中周围的图案减少了中央图案的感知对比度.
  • 通常PwPP显示的对比抑制比对照的弱,但潜在的机制仍然不清楚.

研究的目的:

  • 调查控制中的感知和神经环境抑制,PwPP的亲属和PwPP.
  • 通过fMRI和MR光谱学探索导致围绕抑制减少的神经机制.
  • 评估脑后皮层中的GABA度及其与视觉处理的关系.

主要方法:

  • 在38个对照,44个亲属和64个PwPP中评估了围绕抑制.
  • 量化对比差别值和7特斯拉fMRI响应在LGN,V1和LOC.
  • 使用7T MR光谱测量尾GABA度.

主要成果:

  • 与对照组相比,PwPP和相对对照组的环绕抑制较弱.
  • 两组之间没有发现V1包围抑制强度的显著差异.
  • 在PwPP中没有减少周围抑制的行为证据;抑制指标与GABA或症状无关.
  • V1 fMRI 显示了群体对周围环境的解码差异,PwPP 的准确性较低.

结论:

  • 在精神分裂症患者中存在微妙的视觉中心周围处理差异.
  • 与先前研究的差异可能来自任务设计或注意力差异.
  • 在V1中中心与周围的破解表明PwPP中的空间上下文的神经表示不太可靠.