Department of Psychology, The Ohio State University, Columbus, OH, USA.
Sci Rep. 2020 Oct 22;10(1):18039. doi: 10.1038/s41598-020-75015-7.
What determines the functional organization of cortex? One hypothesis is that innate connectivity patterns, either structural or functional connectivity, set up a scaffold upon which functional specialization can later take place. We tested this hypothesis by asking whether the visual word form area (VWFA), an experience-driven region, was already functionally connected to proto language networks in neonates scanned within one week of birth. Using the data from the Human Connectone Project (HCP) and the Developing Human Connectome Project (dHCP), we calculated intrinsic functional connectivity during resting-state functional magnetic resonance imaging (fMRI), and found that neonates showed similar functional connectivity patterns to adults. We observed that (1) language regions connected more strongly with the putative VWFA than other adjacent ventral visual regions that also show foveal bias, and (2) the VWFA connected more strongly with frontotemporal language regions than with regions adjacent to these language regions. These data suggest that the location of the VWFA is earmarked at birth due to its connectivity with the language network, providing evidence that innate connectivity instructs the later refinement of cortex.
是什么决定了大脑皮层的功能组织?有一种假设认为,先天的连接模式,无论是结构连接还是功能连接,为后来的功能特化提供了一个支架。我们通过询问在出生后一周内扫描的新生儿的视觉词形区(VWFA)是否已经与原始语言网络建立了功能连接,来验证这一假设。利用人类连接组计划(HCP)和发展中的人类连接组计划(dHCP)的数据,我们在静息状态功能磁共振成像(fMRI)期间计算了内在功能连接,发现新生儿表现出与成人相似的功能连接模式。我们观察到:(1)语言区域与假定的 VWFA 的连接比其他也表现出中央凹偏置的相邻腹侧视觉区域更强;(2)VWFA 与额颞语言区域的连接比与这些语言区域相邻的区域更强。这些数据表明,VWFA 的位置在出生时就已经确定,因为它与语言网络的连接,这为先天连接指导皮层的后期细化提供了证据。