早期和中级视觉皮层对高层对象分类的贡献
Lily E Kramer1, Yi-Chia Chen2, Bria Long3
1University of Chicago.
bioRxiv : the preprint server for biology
|July 3, 2023
概括
早期视觉皮层神经元编码高层次的对象信息,挑战了复杂图像分析只发生在后期的大脑区域的观点. 这表明,即使在早期的视觉处理中,抽象的区别也在初步解.
科学领域:
- 神经科学是一个神经科学.
- 计算神经科学是一种神经科学.
- 视觉感知 视觉感知 视觉感知
背景情况:
- 腹部视觉流显示了由神经元从早期到晚期调整的越来越复杂的特征.
- 高级对象分类传统上归因于较高的视觉区域,因为复杂的图像格式要求.
- 人类观察者可以根据抽象性质对刺激进行分类,即使低级和中级特征被保留但对象身份丢失 ("texforms").
研究的目的:
- 调查早期视觉皮层区域是否编码抽象的,高级别的分类信息.
- 测试早期视觉区域的神经元群体是否可以从简化的刺激中解码现实世界的尺寸和动态性.
- 为了将神经解码精度与人类感知分类能力相关联.
主要方法:
- 从 rhesus 子的早期 (V1) 和中级 (V4) 视觉皮层区域进行的神经细胞群记录.
- 在录音期间呈现不变的源刺激和"texforms" (简化的刺激保留低/中级特征).
- 基于机器学习的真实世界的尺寸和动态从神经活动的解码.
主要成果:
- 神经解码成功地识别了来自几十个神经元的记录的不变图像和文本形式的真实世界尺寸和动态性.
- 对文本形式的解码精度与未改变的刺激的解码精度相当.
- 神经解码性能与人类观察者根据尺寸和动态性对文本形式进行分类的能力相关.
结论:
- 早期视觉层次结构中的神经元群体包含与更高层次对象感知相关的信号.
- 早期的视觉区域展示了高级别区分的初步解,挑战了传统的等级处理模型.
- 这些发现表明早期视觉皮层在物体感知中的作用比以前假设的更为综合.
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