The extreme capsule in humans and rethinking of the language circuitry.
The extreme capsule in humans and rethinking of the language circuitry.
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DOI：
10.1007/s00429-008-0199-8
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发表时间：
2009-02
影响因子：
3.1
通讯作者：
Pandya, Deepak N.
中科院分区：
文献类型：
--
作者：
Makris, Nikos;Pandya, Deepak N.
对猴子的实验和成像研究已经勾勒出在额-颞-顶叶区域内的各种长关联纤维通路。在本研究中，使用DT-MRI束状图描绘了5名人类受试者的极端囊（EmC）纤维的轨迹。脑后皮层似是一条连接额下回和颞上回的长纤维通路，延伸至顶叶下小叶。在同一受试者中，将EmC纤维与相邻的关联纤维通路，即中纵束（MdLF）进行比较，发现EmC位于相对于MdLF的内侧和吻侧位置，部分位于脑岛内侧壁。EmC也可以与其他邻近的纤维通路如外包膜、钩状束、弓形束、上纵束II和上纵束III以及下纵束区分开来。考虑到EmC位于语言区，特别是额叶的Broca区、颞叶和顶叶下小叶的Wernicke区，我们认为极端囊可能在语言功能中起作用。
Experimental and imaging studies in monkeys have outlined various long association fiber pathways within the fronto-temporo-parietal region. In the present study, the trajectory of the extreme capsule (EmC) fibers has been delineated in five human subjects using DT-MRI tractography. The EmC seems to be a long association fiber pathway, which courses between the inferior frontal region and the superior temporal gyrus extending into the inferior parietal lobule. Comparison of EmC fibers with the adjacent association fiber pathway, the middle longitudinal fascicle (MdLF), in the same subjects reveals that EmC is located in a medial and rostral position relative to MdLF flanking in part the medial wall of the insula. The EmC can also be differentiated from other neighboring fiber pathways such as the external capsule, uncinate fascicle, arcuate fascicle, superior longitudinal fascicles II and III, and the inferior longitudinal fascicle. Given the location of EmC within the language zone, specifically Broca’s area in the frontal lobe, and Wernicke’s area in the temporal lobe and inferior parietal lobule, it is suggested that the extreme capsule could have a role in language function.
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