特発性てんかんを有する犬における視床、尾状核、および視床間癒着の構造的MRI所見
Tsz Yan Chan1, Nicolas Israeliantz1, Megan Madden1
1Royal (Dick) School of Veterinary Studies, University of Edinburgh, Edinburgh, UK.
まとめ
特発性てんかん(IE)を有する犬は、健常犬と比較して、視床間癒着の増大、視床および尾状核の容積の縮小といった有意な脳構造の変化を示す。これらの犬のてんかん所見については、さらなる研究が必要である。
科学分野:
- 獣医学神経学
- 比較神経画像診断学
- てんかん研究
背景:
- ヒトのてんかんでは、視床および基底核(BN)の構造的変化が知られている。
- 犬の特発性てんかん(IE)における同様の変化に関する研究は限られている。
研究 の 目的:
- IEを有する犬と対照群の犬における視床および尾状核の形態を評価および比較すること。
- 犬のてんかんにおける潜在的な構造的差異を調査すること。
主な方法:
- 磁気共鳴画像法(MRI)検査の後向き解析。
- IE群(n=40)と対照群(n=38)の間で、視床間癒着(ITA)の厚さ/面積、視床の面積/容積、および尾状核の面積/容積を比較した。
主要な成果:
- IEを有する犬は、有意に厚く、面積の大きいITAを示した。
- IEを有する犬は、視床の面積と容積、および尾状核の容積が小さかった。
- 尾状核の面積または視床および尾状核の非対称指数に有意差は見られなかった。
結論:
- 視床および尾状核のサイズが小さいことは、犬の特発性てんかんと関連している。
- IEの病態生理における回路の関与をさらに調査し、所見を他の基底核に一般化するには、さらなる研究が必要である。
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