量研学術機関リポジトリ「QST-Repository」は、国立研究開発法人 量子科学技術研究開発機構に所属する職員等が生み出した学術成果（学会誌発表論文、学会発表、研究開発報告書、特許等）を集積しインターネット上で広く公開するサービスです。 Welcome to QST-Repository where we accumulates and discloses the academic research results(Journal Publications, Conference presentation, Research and Development Report, Patent, etc.) of the members of National Institutes for Quantum Science and Technology.
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Purpose: Although visuospatial memory impairment was demonstrated in retired professional boxers, the pathophysiological change is still unclear. This study was aimed to evaluate the chronic white matter (WM) changes and to detect the regions correlated with visuospatial memory in professional boxers.
Materials and Methods: Diffusion tensor images were performed for fifteen professional boxers (including 2 active boxers) and healthy controls (HC) on 3T MRI. Group difference was assessed using tract-based spatial statistics, and correlation between the WM changes and the Rey-Osterreich complex figure test (ROCFT) was assessed in professional boxers.
Results: Professional boxers had lower fractional anisotropy (FA) value than HC in bilateral anterior thalamic radiation (ATR), corticospinal tract, cingulum, inferior fronto-occipital fasciculus (IFOF), superior and inferior longitudinal fasciculus (SLF/ILF), forceps major and minor, and corpus callosum (CC) (p<0.05). Especially, ROCFT (delayed recall) score showed negative correlation between FA value in the right ATR, IFOF, SLF, ILF and forceps major. (p<0.05)
Conclusions: In professional boxers, wide WM change in the cerebrum predominantly in th posterior tract is described, and the right posterior tract is related to visuospatial memory impairment.
プロボクサーにおける慢性期白質障害と視空間記憶障害の関係
