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Plasticity versus stability across the human cortical visual connectome

机译:塑性对人类皮质视觉连接的稳定性

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Whether and how the balance between plasticity and stability varies across the brain is an important open question. Within a processing hierarchy, it is thought that plasticity is increased at higher levels of cortical processing, but direct quantitative comparisons between low- and high-level plasticity have not been made so far. Here, we address this issue for the human cortical visual system. We quantify plasticity as the complement of the heritability of resting-state functional connectivity and thereby demonstrate a non-monotonic relationship between plasticity and hierarchical level, such that plasticity decreases from early to mid-level cortex, and then increases further of the visual hierarchy. This non-monotonic relationship argues against recent theory that the balance between plasticity and stability is governed by the costs of the "coding-catastrophe", and can be explained by a concurrent decline of short-term adaptation and rise of long-term plasticity up the visual processing hierarchy.
机译:无论是如何以及塑性和稳定性之间的平衡如何在大脑上变化是一个重要的开放问题。在处理层次结构中,认为可塑性在更高水平的皮质加工下增加,但到目前为止,尚未进行低级别可塑性之间的直接定量比较。在这里,我们解决了人类皮质视觉系统的这个问题。我们量化可塑性作为休息状态功能连接的可遗传性的补充,从而展示可塑性和分层水平之间的非单调关系,使得可塑性从早期到中层皮质减小,然后增加视觉层次结构。这种非单调的关系反对最近的理论,即可塑性和稳定性之间的平衡受“编码灾难”的成本,可以通过并发下降的短期适应和长期可塑性的升高来解释视觉处理层次结构。

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