Heritable functional architecture in human visual cortex

Heritable functional architecture in human visual cortex
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人类视觉皮层的可遗传功能结构

DOI:
10.1101/2020.05.04.077545
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发表时间:
2020
期刊:
--
影响因子:
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通讯作者:
Alvarez I
Alvarez I
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文献类型:
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作者:
Alvarez I

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我们视觉系统的功能组织有多少是遗传的?在这里,我们使用功能性磁共振成像测试了人类视觉皮层视网膜图的遗传性。我们证明,retinotopic组织表现出更密切的对应,在同卵(MZ)相比,异卵(DZ)双胞胎对,这表明部分遗传决定。使用群体感受野(pRF)分析来检查这些神经元群体的首选空间位置和选择性,我们估计极角偏好和空间选择性的遗传率约为10-20%,如通过pRF大小量化的,在纹外区V2和V3。我们的研究结果是一致的遗传性在宏观安排的视觉区域和刺激调谐特性的视觉皮层。这可能构成了一系列感知效应变化的神经基质,这些感知效应本身至少部分地由基因决定。这些研究结果也增加了收敛的证据,功能地图拓扑结构与皮质形态学的假设。
How much of the functional organization of our visual system is inherited? Here we tested the heritability of retinotopic maps in human visual cortex using functional magnetic resonance imaging. We demonstrate that retinotopic organization shows a closer correspondence in monozygotic (MZ) compared to dizygotic (DZ) twin pairs, suggesting a partial genetic determination. Using population receptive field (pRF) analysis to examine the preferred spatial location and selectivity of these neuronal populations, we estimate a heritability around 10–20% for polar angle preferences and spatial selectivity, as quantified by pRF size, in extrastriate areas V2 and V3. Our findings are consistent with heritability in both the macroscopic arrangement of visual regions and stimulus tuning properties of visual cortex. This could constitute a neural substrate for variations in a range of perceptual effects, which themselves have been found to be at least partially genetically determined. These findings also add convergent evidence for the hypothesis that functional map topology is linked with cortical morphology.
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