面部选择神经元的失活会改变眼睛的运动,当自由观看面孔时
Reza Azadi1, Emily Lopez1, Jessica Taubert2,3
1Unit on Neurons, Circuits and Behavior, Laboratory of Neuropsychology, National Institute of Mental Health, NIH, Bethesda, MD 20892.
概括
科学家们发现,使大脑中的面部选择神经元失活,可以使面部选择神经元失活.
科学领域:
- 神经科学是一个神经科学.
- 视觉处理 视觉处理
- 眼神运动控制器的控制器
背景情况:
- 面部特征自然会吸引人的目光,这表明视觉处理和眼睛运动之间存在联系.
- 然而,缺乏直接的生理证据将面部编码神经元与眼运动系统连接起来.
研究的目的:
- 研究面部选择性神经元在下 (IT) 皮层对眼睛运动模式的因果作用.
- 建立高水平视觉区域和眼运动系统之间的机械联系.
主要方法:
- 使用功能磁共振成像 (fMRI) 识别的IT皮质中的面部补丁.
- 施用muscimol微注射来抑制脸部贴片内外的神经活动.
- 在神经抑制后观看自然场景时记录眼动.
主要成果:
- 面部选择神经元的失活改变了观察面部时的眼睛运动模式.
- 子仍然可以检测到面部,但忽视了眼睛,与非活化的半球相反.
- 这表明IT皮层面部补丁在引导目光向面部特征方面发挥了因果作用.
结论:
- 高层视觉皮层,特别是IT面部补丁,因果关系有助于控制眼睛的运动.
- 这项研究提供了对神经回路的生理证据,这些神经回路是对面孔的凝视控制的基础.
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