通过fMRI揭示的的上方体中的侧面视图组织
Alessia Sepe1, Matteo Panormita2, Qi Zhu3
1Department of Neurosciences, Laboratory of Neuro- and Psychophysiology, KU Leuven Medical School, Leuven 3000, Belgium; Leuven Brain Institute, KU Leuven, Leuven 3000, Belgium; Department of Medicine and Surgery, University of Parma, Parma, Italy.
Progress in neurobiology
|October 14, 2025
概括
上半球 (SC) 在绘制视觉空间时显示出明显的左半球和右半球差异. 这项研究揭示了SC的功能横向化,影响灵长类动物如何处理视觉信息.
科学领域:
- 神经科学是一个神经科学.
- 灵长类动物的视力
- 功能神经成像 功能神经成像
背景情况:
- 上层 (SC) 集成了多感官信息,用于指导行为.
- 早期的模型强调了外围的SC表示,但最近的证据表明,对于精确的准,有显著的foveal表示.
研究的目的:
- 用超高分辨率的fMRI绘制中SC的视图组织.
- 在SC视觉表示中调查潜在的半球间不对称性.
主要方法:
- 超高分辨率相位编码fMRI在六只身上使用.
- 空间局部化的刺激被用来绘制视觉反应的地图,直至40°偏心.
主要成果:
- 证实了以前的SC视位组发现,并确定了显著的半球间不对称性.
- 左侧的SC显示了一个清晰的偏心图,而右侧的SC显示了更突出的极角图和更广泛的外围响应.
- 在SC的侧面反应反映在皮质内,一个关键的皮质输入.
结论:
- 这些发现表明,灵长类 SC 中的功能横向化,左半球和右半球具有不同的视觉处理作用.
- 这种不对称性可能源于放大因子或抑制过程的差异.
- 非人类灵长类动物的功能横向化可能比以前理解的更广泛.
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