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Defining the most probable location of the parahippocampal place area using cortex-based alignment and cross-validation

机译:使用基于皮质的对齐方式和交叉验证来定义海马旁位置区域的最可能位置

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摘要

The parahippocampal place area (PPA) is a widely studied high-level visual region in the human brain involved in place and scene processing. The goal of the present study was to identify the most probable location of place-selective voxels in medial ventral temporal cortex. To achieve this goal, we first used cortex-based alignment (CBA) to create a probabilistic place-selective region of interest (ROI) from one group of 12 participants. We then tested how well this ROI could predict place selectivity in each hemisphere within a new group of 12 participants. Our results reveal that a probabilistic ROI (pROI) generated from one group of 12 participants accurately predicts the location and functional selectivity in individual brains from a new group of 12 participants, despite between subject variability in the exact location of place-selective voxels relative to the folding of parahippocampal cortex. Additionally, the prediction accuracy of our pROI is significantly higher than that achieved by volume-based Talairach alignment. Comparing the location of the pROI of the PPA relative to published data from over 500 participants, including data from the Human Connectome Project, shows a striking convergence of the predicted location of the PPA and the cortical location of voxels exhibiting the highest place selectivity across studies using various methods and stimuli. Specifically, the most predictive anatomical location of voxels exhibiting the highest place selectivity in medial ventral temporal cortex is the junction of the collateral and anterior lingual sulci. Methodologically, we share this pROI with the field (vpnl.stanford.edu/PlaceSelectivity), which provides a means to accurately identify a functional region from anatomical MRI data when fMRI data are not available (for example, in patient populations). Theoretically, we consider different anatomical and functional factors that may contribute to the consistent anatomical location of place selectivity relative to the folding of high-level visual cortex.
机译:海马旁区域(PPA)是人脑中涉及位置和场景处理的广泛研究的高级视觉区域。本研究的目的是确定腹内侧颞叶皮质中位置选择性体素的最可能位置。为了实现这一目标,我们首先使用基于皮质的比对(CBA)从一组12名参与者中创建了一个概率性的位置选择感兴趣区域(ROI)。然后,我们测试了这个投资回报率如何很好地预测12名参与者组成的新组中每个半球的位置选择性。我们的结果表明,由一组12名参与者生成的概率ROI(pROI)可以准确预测一组12名参与者组成的新大脑在各个大脑中的位置和功能选择性,尽管受试者在位置选择体素相对于确切位置的准确位置之间存在差异海马旁皮质的折叠。此外,我们pROI的预测准确性明显高于基于体积的Talairach对齐所达到的预测准确性。将PPA的pROI的位置与来自500多个参与者的已发布数据(包括来自人类Connectome项目的数据)进行比较,显示PPA的预测位置与体素的皮质位置具有惊人的融合,在整个研究中显示出最高的位置选择性使用各种方法和刺激。具体而言,在内侧腹颞皮层中表现出最高位置选择性的体素的最可预测的解剖学位置是侧支和前舌沟的交界处。从方法上讲,我们与领域(vpnl.stanford.edu/PlaceSelectivity)共享此pROI,当fMRI数据不可用时(例如,在患者人群中),这提供了一种从解剖MRI数据准确识别功能区域的方法。从理论上讲,我们考虑了不同的解剖和功能因素,这些因素可能有助于位置选择性相对于高级视觉皮层折叠的一致解剖位置。

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