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arXiv 2404.04858q-bio.NC
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初级视觉皮层中的感受野是否在感受野伸长程度上存在变异性?

Do the receptive fields in the primary visual cortex span a variability over the degree of elongation of the receptive fields?

KTH Royal Institute of Technology(瑞典皇家理工学院)

Tony Lindeberg

AI总结:

本文通过理论分析与生物学测量结合,研究初级视觉皮层感受野是否在伸长程度上存在变异性,并支持仿射协变性假设,提出可测试的神经生理学预测。

摘要:

本文结合了(i)关于仿射高斯导数模型中方向选择性与感受野伸长之间关系的理论分析,以及(ii)初级视觉皮层中方向选择性的生物学测量,以研究(iii)感受野是否可以被视为在伸长程度上存在变异性。\n通过对初级视觉皮层中简单细胞和复杂细胞感受野的理想化模型进行深入的理论分析,我们确定方向选择性随着感受野伸长的增加而变得更加狭窄。通过与先前已建立的关于初级视觉皮层中视觉神经元宽窄方向调谐的生物学结果进行比较,我们证明这些潜在的理论预测与这些生物学结果相结合,与先前提出的生物学假设一致,即生物感受野形状应跨越仿射图像变换的自由度,以支持初级视觉皮层中感受野群体的仿射协变性。\n基于这种对仿射协变性工作假设的可能间接支持,我们提出了一组可测试的预测,这些预测可用于通过神经生理学实验来判断高等哺乳动物初级视觉皮层中的感受野是否可以被视为在离心率或伸长程度上存在变异性,如果是,则进一步表征这种变异性是否以结构化的方式与视觉皮层中的图钉结构相关。

英文摘要:

This paper presents results of combining (i) theoretical analysis regarding connections between the orientation selectivity and the elongation of receptive fields for the affine Gaussian derivative model with (ii) biological measurements of orientation selectivity in the primary visual cortex, to investigate if (iii) the receptive fields can be regarded as spanning a variability in the degree of elongation. From an in-depth theoretical analysis of idealized models for the receptive fields of simple and complex cells in the primary visual cortex, we have established that the directional selectivity becomes more narrow with increasing elongation of the receptive fields. By comparison with previously established biological results, concerning broad vs. sharp orientation tuning of visual neurons in the primary visual cortex, we demonstrate that those underlying theoretical predictions, in combination with these biological results, are consistent with a previously formulated biological hypothesis, stating that the biological receptive field shapes should span the degrees of freedom in affine image transformations, to support affine covariance over the population of receptive fields in the primary visual cortex. Based on this possible indirect support for the working hypothesis concerning affine covariance, we formulate a set of testable predictions that could be used to, with neurophysiological experiments, judge if the receptive fields in the primary visual cortex of higher mammals could be regarded as spanning a variability over the eccentricity or the elongation of the receptive fields, and, if so, then also characterize if such a variability would, in a structured way, be related to the pinwheel structure in the visual cortex.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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