Cortical connectivity is embedded in resting state at columnar resolution.

Cortical connectivity is embedded in resting state at columnar resolution.
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DOI:
10.1016/j.pneurobio.2022.102263
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发表时间:
2022-06
影响因子:
6.7
通讯作者:
Gharbawie, Omar A.
Gharbawie, Omar A.
中科院分区:
医学2区
文献类型:
--
作者:
Card, Nicholas S.;Gharbawie, Omar A.

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静息态(RS)功能磁共振成像现在被广泛用于深入了解大脑网络的组织。从RS-fMRI推断的功能连接(FC)通常是在宏观尺度上,这是太粗糙的皮质架构中的许多细节。在这里,我们研究是否成像RS在更高的对比度和分辨率可以揭示皮质连接与柱状粒度。在纵向实验(~1.5岁)中,我们使用密集微电极标测对松鼠猴的感觉运动皮层进行分区,然后使用内在信号光学成像(RS-ISOI,20 μm/像素)记录RS。FC地图的基准对微刺激诱发的激活和跟踪解剖连接。这些直接比较显示,不同方法之间的连接模式具有高度对应性。FC映射到皮层连接的保真度表明网络组织的粒度细节嵌入在RS中。因此,对于记录RS,ISOI实现的视场和有效分辨率填补了fMRI和侵入性方法(双光子成像,电生理学)之间的空白。RS-ISOI为活体动物皮层网络的高分辨率映射提供了令人兴奋的机会。
Resting state (RS) fMRI is now widely used for gaining insight into the organization of brain networks. Functional connectivity (FC) inferred from RS-fMRI is typically at macroscale, which is too coarse for much of the detail in cortical architecture. Here, we examined whether imaging RS at higher contrast and resolution could reveal cortical connectivity with columnar granularity. In longitudinal experiments (~1.5 years) in squirrel monkeys, we partitioned sensorimotor cortex using dense microelectrode mapping and then recorded RS with intrinsic signal optical imaging (RS-ISOI, 20 μm/pixel). FC maps were benchmarked against microstimulation-evoked activation and traced anatomical connections. These direct comparisons showed high correspondence in connectivity patterns across methods. The fidelity of FC maps to cortical connections indicates that granular details of network organization are embedded in RS. Thus, for recording RS, the field-of-view and effective resolution achieved with ISOI fills a wide gap between fMRI and invasive approaches (2-photon imaging, electrophysiology). RS-ISOI opens exciting opportunities for high resolution mapping of cortical networks in living animals.
早期视觉皮层中额叶信号的自下而上的门控。
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