...The central canal of the spinal cord, which would normally lose communication with the ventricular system and collapse, remains connected to the ventricular system due to the obstruction of cerebrospinal fluid flow caused by the subarachnoid blockage near the cisterna magna, and is thought to expand and form a cavity due to the pressure of the cerebrospinal fluid. Syringomyelia lesions usually occur mainly in the lower cervical spinal cord, but sometimes similar cavities occur in the medulla oblongata (syringobulbia). Clinical symptoms include muscle atrophy and weakness in the upper limbs, mainly in the peripheral parts, but a characteristic feature of this disease is the loss of temperature and pain sensation, often asymmetrically and sometimes only in one side of the neck, upper limbs, and upper chest. ... *Some of the terminology that refers to "syringomyelia" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…通常は脳室系との交通をしだいに失って虚脱していくはずの脊髄中心管が,大槽付近のくも膜下腔ブロックによる髄液の通過障害のため,脳室系と交通したままで残り,髄液の圧力が加わるために拡張して空洞を形成すると考えられている。 脊髄空洞症の病変は下部頸髄を中心に生ずるのが普通であるが,ときには延髄にも同様の空洞が生ずることがある(延髄空洞症syringobulbia)。臨床症状としては,上肢の主として末梢部に筋萎縮と筋力低下がみられるが,この病気に特徴的なものは,しばしば左右非対称性,場合によっては一側のみの頸部,上肢および上胸部にみられる温度覚と痛覚のみの脱失である。… ※「延髄空洞症」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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