Characteristics of the aberrant pyramidal tract in comparison with the pyramidal tract in the human brain

Title
Characteristics of the aberrant pyramidal tract in comparison with the pyramidal tract in the human brain
Author(s)
장성호권혁규손수민장민철김세윤권용현[권용현]
Keywords
DIFFUSION-TENSOR-TRACTOGRAPHY; MEDIAL LEMNISCUS; PATIENT; STEM; INFARCT
Issue Date
201111
Publisher
BIOMED CENTRAL LTD
Citation
BMC NEUROSCIENCE, v.12
Abstract
Background: 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. Results: 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); however, no difference in mean diffusivity (MD) value was observed (P > 0.05). Conclusion: 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.
URI
http://hdl.handle.net/YU.REPOSITORY/24285http://dx.doi.org/10.1186/1471-2202-12-108
ISSN
1471-2202
Appears in Collections:
의과대학 > 재활의학교실 > Articles
의과대학 > 소아청소년과학교실 > Articles
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