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首页> 外文期刊>The European Journal of Neuroscience >The postcentral sulcal complex and the transverse postcentral sulcus and their relation to sensorimotor functional organization
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The postcentral sulcal complex and the transverse postcentral sulcus and their relation to sensorimotor functional organization

机译：中央后沟复合体和中央后沟横向沟及其与感觉运动功能组织的关系

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摘要

It has been demonstrated that the postcentral sulcus, which forms the posterior boundary of the sensorimotor region, is a complex of distinct sulcal segments. Although the general somatotopic arrangement in the human sensorimotor cortex is relatively well known, we do not know whether the different segments of the postcentral sulcus relate in a systematic way to the sensorimotor functional representations. Participants were scanned with functional magnetic resonance imaging while they made movements of different body parts and the location of functional activity was examined on a subject-by-subject basis with respect to the morphological features of the postcentral sulcus. The findings demonstrate that the postcentral sulcus of each subject may be divided into five segments and there is a tight relationship between sensorimotor representations of different body parts and specific segments of the postcentral sulcus. The results also addressed the issue of the transverse postcentral sulcus, a short sulcus that is present within the ventral part of the postcentral gyrus in some brains. It was shown that, when present, this sulcus is functionally related to the oral (mouth and tongue) sensorimotor representation. When this sulcus is not present, the inferior postcentral sulcus which is also related to the oral representation is longer. Thus, the sulcal morphology provides an improved framework for functional assignments in individual subjects.
机译：已经证明形成感觉运动区域的后边界的后中央沟是不同的沟段的复合体。尽管人体感觉运动皮层中的一般体位排列是众所周知的，但我们不知道中央后沟的不同部分是否以系统的方式与感觉运动功能表征有关。在参与者进行不同身体部位的运动时，对他们进行功能磁共振成像扫描，并根据受试者的中心后沟形态特征检查其功能活动的位置。研究结果表明，每个受试者的中央后沟可分为五个部分，不同身体部位的感觉运动表现与中央后沟的特定部分之间存在紧密的关系。研究结果还解决了横中央后沟的问题，横沟是一些大脑中中央回后腹的短沟。结果表明，该沟在功能上与口腔（口和舌）感觉运动表现有关。当不存在该沟时，也与口腔代表性有关的下中央后沟较长。因此，沟形态为个体受试者的功能分配提供了一个改进的框架。

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