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人类视觉皮层中的空间频率地图:复制和扩展

Jiyeong Ha¹, William F Broderick², Kendrick Kay³

¹Department of Psychology and Center for Neural, New York University, NY, USA.

bioRxiv : the preprint server for biology

|February 3, 2025

概括

这项研究使用新的数据集验证了人类视觉皮层中的空间频率调模型. 该模型准确地预测了响应,并在视觉区域V1,V2和V3中显示了一致的调整.

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:

此前已经开发了一种紧的9参数模型,用于人类V1的空间频率调节.
这个模型根据刺激方向和空间频率预测了BOLD响应幅度.

研究的目的:

在一个新的数据集 (自然景观数据集) 中复制空间频率调整模型.
在不同的实验条件下评估模型参数的概括性.
将模型的应用扩展到外层视觉区域V2和V3.

主要方法:

在"nsdsynthetic"数据集上复制了9参数模型的拟合.
分析了自然景观数据集中的8个受试者的视网膜图.
将分析扩展到外层视觉区域V2和V3.

主要成果:

在大多数模型参数中,尽管存在实验差异,但仍发现了良好的一致性.
在V1中偏好的空间频率依赖于异心率与之前的发现一致.
空间频率调整带宽从V1显著增加到V2和V3,与接收场的大小相关.

结论:

这项研究证明了空间频率调模型的强大可重现性.
结果推进了人类视觉系统中空间编码的系统性表征.
这些发现支持该模型对理解视觉皮层功能的有用性.

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