The parasagittal zonation within the olivocerebellar projection. II. Climbing fiber distribution in the intermediate and hemispheric parts of cat cerebellum
The parasagittal zonation within the olivocerebellar projection. II. Climbing fiber distribution in the intermediate and hemispheric parts of cat cerebellum
复制标题
橄榄小脑投影内的矢状旁分区。
DOI：
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发表时间：
1979
期刊：
影响因子：
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通讯作者：
S. L. Freedman
中科院分区：
文献类型：
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作者：
H. Groenewegen;J. Voogd;S. L. Freedman
橄榄小脑纤维来源于脑干中吻侧下橄榄交叉的不同亚核，并终止于小脑皮质的一个或两个狭窄的纵向排列的区域中。这些纤维向小脑中央核发出侧支，小脑中央核接受来自母纤维终止的同一皮质区的传入。吻侧内侧副橄榄体投射至C2区，并将侧支输送至后间置核。这个亚核的吻极主要投射到小叶旁和袢状小叶之间可以进行区分。在前叶和旁正中小叶，更多的尾侧区与C2区相连。背内侧细胞柱突出到小叶IX的外侧区（A2区），内侧副橄榄的更多吻外侧部分供应该小叶的更外侧区。背侧副橄榄的喙侧半将纤维发送到C1和C3区。这些纤维发出侧支到前间置核。腹外侧的背侧副橄榄，突出到小叶II-IV和旁正中小叶的腹侧叶，以及吻侧背侧副橄榄的背内侧部分，连接小叶V，VI和旁正中小叶的背侧叶。背侧副橄榄的吻侧部为C3区提供较多的纤维，尾侧部的细胞主要分布于C1区。头侧主橄榄与D区相连，并在小脑外侧核中发现侧支末梢。在副绒球中，D区可分为D1和D2亚区。这项研究进一步证实了皮质核和橄榄小脑连接组织的相似性。该结果与最近对橄榄小脑系统的其他研究基本一致（Armstrong等人，'74; Brodal等人，'75; Brodal，'76; Hoddevik等人，'76; Brodal and Walberg，' 77 a，B; Oscarsson，'73，'76; Oscarsson and Sjölund，'77 a，B）。
Olivocerebellar fibers from different subnuclei of the rostral inferior olive decussate in the brain stem and terminate as climbing fibers in one or two narrow, longitudinally arranged zones of the cerebellar cortex. These fibers issue collaterals to the central cerebellar nucleus that receives its afferents from the same cortical zone in which the parent fibers terminate. The rostral medial accessory olive projects to zone C2 and sends collaterals to the posterior interposed nucleus. A differentiation can be made between the rostral pole of this subnucleus which projects primarily to the paraflocculus and the ansiform lobule. More caudal areas connect with zone C2 in the anterior lobe and the paramedian lobule. The dorsomedial cell column projects to a lateral zone (zone A2) of lobule IX and more rostrolateral portions of the medial accessory olive supply a still more lateral zone of this lobule. The rostral half of the dorsal accessory olive sends fibers to zones C1 and C3. These fibers issue collaterals to the anterior interposed nucleus. A distinction can be made between the ventrolateral dorsal accessory olive, projecting to lobules II‐IV and the ventral folia of the paramedian lobule and the dorsomedial portion of the rostral dorsal accessory olive that connects with lobules V, VI and the dorsal folia of the paramedian lobule. The most rostral part of the dorsal accessory olive provides more fibers into zone C3, more caudally located cells distribute primarily to zone C1. The rostral principal olive is connected with zone D and collateral terminations are found in the lateral cerebellar nucleus. In the paraflocculus the D zone can be divided into subzones D1 and D2. This study further substantiates the similarity in the organization of corticonuclear and olivocerebellar connections. The results are in general agreement with other recent investigations on the olivocerebellar system (Armstrong et al., '74; Brodal et al., '75; Brodal, '76; Hoddevik et al., '76; Brodal and Walberg, '77a,b; Oscarsson, '73, '76; Oscarsson and Sjölund, '77a,b).