While the proximal dentatothalamocortical tracts are considered pivotal in the occurrence of cerebellar mutism syndrome (CMS) after medulloblastoma resection, how the cerebellum participates in motor-speech networks through direct structural connectivity is still unclear. Via tractography, we provide evidence of cerebellar streamlines projecting into the left inferior frontal gyrus majorly connecting Broca's complex and the bilateral Crus lobes. The streamlines, named Crus-Broca tracts, originated from the bilateral Crus lobes, synapsed onto the dentate nucleus, ascended into the superior cerebellar peduncle (where these streamlines were closely superior to the superior border of the supratonsillar cleft and the superolateral roof of the fourth ventricle), surprisingly bypassed the left red nucleus and the left thalamus, and ended at the subregions of Broca's complex. The streamlines, named Broca-Crus tracts, originated from the subregions of Broca's complex and ended predominantly at the right Crus lobes. If verified, the existence of these connections would support the notion of the bilateral cerebellums' participation in motor-speech planning, and the anatomical relationship of Broca-Crus tracts with the supratonsillar cleft would merit consideration for further studies aimed at further elucidating CMS mechanisms.

中文翻译：

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双边克鲁斯叶和布罗卡复合体之间相互结构网络相互作用的证据。

尽管认为近端齿状丘脑-皮层束道在髓母细胞瘤切除术后小脑裂综合征（CMS）的发生中起关键作用，但小脑如何通过直接结构连接参与运动语音网络仍不清楚。通过超声检查，我们提供了小脑流线投射到左下额回中的证据，主要连接Broca复合体和双侧Crus裂片。这些流线命名为Crus-Broca管道，起源于双侧Crus裂片，突触到齿状核，上升到上小脑梗（在此处，这些流线紧邻上上illa裂的上边界和第四小脑的顶外侧）心室），意外地绕过了左红色核和左丘脑，并在布罗卡综合大楼的次区域结束。流线称为Broca-Crus片段，起源于Broca复合体的次区域，主要终止于右Crus裂片。如果得到证实，这些连接的存在将支持双侧小脑参与运动语音计划的概念，并且Broca-Crus道与上rat裂的解剖关系值得进一步研究，以进一步阐明CMS机制。