文章基本信息

标题：Characteristics of the aberrant pyramidal tract in comparison with the pyramidal tract in the human brain
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作者：Hyeok Gyu Kwon ; Su Min Son ; Min Cheol Chang 等
期刊名称：BMC Neuroscience
印刷版ISSN：1471-2202
电子版ISSN：1471-2202
出版年度：2011
卷号：12
期号：1
页码：108
DOI：10.1186/1471-2202-12-108
语种：English
出版社：BioMed Central
摘要：The aberrant pyramidal tract (APT) refers to the collateral pathway of the pyramidal tract (PT) through the medial lemniscus in the midbrain and pons. Using diffusion tensor tractography (DTT), we investigated the characteristics of the APT in comparison with the PT in the normal human brain. In thirty-four (18.3%, right hemisphere: 20, left hemisphere: 14) of the 186 hemispheres, the APTs separated from the PT at the upper midbrain level, descended through the medial lemniscus from the midbrain to the pons, and then rejoined with the PT at the upper medulla. Nine (26.5%) of the 34 APTs were found to originate from the primary somatosensory cortex without a primary motor cortex origin. Values of fractional anisotropy (FA) and tract volume of the APT were lower than those of the PT (P 0.05). We found that the APT has different characteristics, including less directionality, fewer neural fibers, and less origin from the primary motor cortex than the PT.
关键词：Fractional Anisotropy ; Diffusion Tensor Imaging ; Pyramidal Tract ; Mean Diffusivity ; Motor Recovery