THE RAPHE NUCLEI OF THE BRAIN STEM IN THE CAT .2. EFFERENT CONNECTIONS
THE RAPHE NUCLEI OF THE BRAIN STEM IN THE CAT .2. EFFERENT CONNECTIONS
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DOI：
10.1002/cne.901140304
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发表时间：
1960-01-01
影响因子：
2.5
通讯作者：
WALBERG, F
中科院分区：
文献类型：
--
作者：
BRODAL, A;TABER, E;WALBERG, F
中缝核团的传出联系已经通过记录这些核团在（1）头端脑干、（2）脊髓和（3）小脑损伤后发生的逆行细胞变化来研究。在记录中仅考虑了显示中央、同质（乳白色）细胞质和细胞核周边移位的细胞。结果表明，长的上行纤维构成了数量上最重要的传出投射。它们来自中缝的所有核群，但来自中间群的数量较少（nn。大中缝和脑桥）的距离大于尾侧和吻侧。来自嘴侧线状核的纤维进入苍白球[长划线]尾状壳核[长划线]和/或前丘脑。中缝尾侧核的上行纤维大部分终止于中脑。下行纤维比上行纤维少。它们主要来自中缝大核，少量来自中缝苍白核，少数来自中缝隐核和脑桥。它们部分在外侧索的背侧下降，似乎不经过胸髓下方。小脑的纤维在传出纤维中占相对较小的比例。它们主要来自中缝桥核，似乎终止于小脑内核。关于其传出投射的组织，中缝核与网状结构存在值得注意的相似之处。一些功能的影响的研究结果进行了讨论。
The efferent connections of the nuclei of the raphe have been studied by recording the occurrence of retrograde cellular changes in these nuclei following (1) lesions of the rostral brain stem, (2) the spinal cord, and (3) the cerebellum. Only cells showing a central, homogenous (milky) cytoplasm and peripheral displacement of the nucleus have been taken into account in the recordings. It is concluded from the findings that long ascending fibers make up the quantitatively most important efferent projection. They come from all nuclear groups of the raphe, but in lesser numbers from the middle groups (nn. raphe magnus and pontis) than from the caudal and rostral ones. Fibers from the nucleus linearis rostralis pass to the region of the globus pallidus[long dash]putamen[long dash]caudate and/or anterior thalamus. Ascending fibers fromthe caudal nuclei of the raphe appear to end largely in the mesencephalon. Descending fibers are less numerous than the ascending ones. Theycome chiefly from the nucleus raphe magnus, with a small contribution from the nucleus raphe pallidus and a few fibers from the nuclei raphe obscurus and pontis. They descend in part in the dorsal half of the lateral funiculus and do not appear to pass below the thoracic cord. Fibers to the cerebellum represent a relatively modest proportion of efferent fibers. They come chiefly from the nucleus raphe pontis and appear to end in the intracerebellar nuclei. With regard to the organization of their efferent projections the nuclei of the raphe present noteworthy similarities with the reticular formation. Some functional implications of the findings are discussed.