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猕猴腹侧顶内沟的功能连接模式揭示了一种前后部特化,这与人类腹侧顶内沟区域所描述的情况相似。

The macaque ventral intraparietal functional connectivity patterns reveal an anterio-posterior specialization mirroring that described in human ventral intraparietal area.

作者信息

Sheng Wei-An, Clavagnier Simon, Froesel Mathilda, Vanduffel Wim, Heed Tobias, Ben Hamed Suliann

机构信息

Institut des Sciences Cognitives Marc Jeannerod, UMR5229, CNRS-University of Lyon 1, Lyon, France.

Department of Neurosciences, Laboratory of Neuro- and Psychophysiology, KU Leuven Medical School, Leuven, Belgium.

出版信息

Imaging Neurosci (Camb). 2025 Feb 27;3. doi: 10.1162/imag_a_00491. eCollection 2025.

Abstract

The macaque monkey's ventral intraparietal area (VIP) in the intraparietal sulcus (IPS) responds to visual, vestibular, tactile, and auditory signals and is involved in higher cognitive functions, including the processing of peripersonal space. In humans, VIP appears to have expanded into three functionally distinct regions. Macaque VIP has been divided cytoarchitonically into medial and lateral parts; however, no functional specialization has so far been associated with this anatomical division. Functional MRI suggests a functional gradient along the anterior-posterior axis of the macaque IPS: anterior VIP shows visio-tactile properties and face preference, whereas posterior VIP responds to large-field visual dynamic stimuli. This functional distinction matches with functional differences among the three human VIP regions, suggesting that a regional specialization may also exist within macaque VIP. Here, we characterized the macaque ipsilateral, whole-brain functional connectivity, assessed during awake resting state, along VIP's anterior-posterior axis by dividing VIP into three regions of interest (ROIs). The functional connectivity profiles of the three VIP ROIs resembled anatomical connectivity profiles obtained by chemical tracing. Anterior VIP was functionally connected to regions associated with motor, tactile, and proprioceptive processing and with regions involved in reaching, grasping, and processing peripersonal space. Posterior VIP had the strongest functional connectivity to regions involved in motion processing and eye movements. These profiles are consistent with the connectivity profiles of the anterior and posterior VIP areas identified in humans. Intermediate VIP did not exhibit specific connectivity profiles. Viewed together, resting-state functional connectivity, task-related fMRI, and anatomical tracing consistently suggest specific functional specializations of macaque anterior and posterior VIP.

摘要

猕猴顶内沟(IPS)中的腹侧顶内区(VIP)对视觉、前庭、触觉和听觉信号作出反应,并参与更高层次的认知功能,包括对个人周边空间的处理。在人类中,VIP似乎已扩展为三个功能不同的区域。猕猴的VIP在细胞构筑学上已被分为内侧和外侧部分;然而,迄今为止,这种解剖学划分尚未与功能特化相关联。功能磁共振成像表明,沿着猕猴IPS的前后轴存在功能梯度:前部VIP表现出视觉触觉特性和面部偏好,而后部VIP对大视野视觉动态刺激作出反应。这种功能差异与人类三个VIP区域之间的功能差异相匹配,表明猕猴VIP内也可能存在区域特化。在这里,我们通过将VIP划分为三个感兴趣区域(ROI),对清醒静息状态下猕猴同侧全脑功能连接沿VIP的前后轴进行了表征。三个VIP ROI的功能连接图谱类似于通过化学追踪获得的解剖连接图谱。前部VIP在功能上与参与运动、触觉和本体感觉处理以及与伸手抓握和处理个人周边空间的区域相连。后部VIP与参与运动处理和眼球运动的区域具有最强的功能连接。这些图谱与在人类中确定的前部和后部VIP区域的连接图谱一致。中间VIP未表现出特定的连接图谱。综合来看,静息态功能连接、任务相关功能磁共振成像和解剖追踪一致表明猕猴前部和后部VIP具有特定的功能特化。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/6985/12319825/7467ed9d98f9/imag_a_00491_fig1.jpg

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