Labyrinthine ataxia

Japanese: labyrinthine ataxia(英語表記)labyrinthineataxia
Labyrinthine ataxia

...the ataxia symptoms in cerebellar ataxia are thought to result from a combination of disorders of several elements important for the control of voluntary movement, including hypotonia, impaired coordination between different muscle groups, and dyschronometria, a delay in the onset of voluntary muscle contractions.
[labyrinthine ataxia]
The only disturbance in balance when standing and walking is the lack of any impairment in individual limb movements or speech. This is caused by lesions of the labyrinth of the inner ear, particularly the semicircular canals and vestibule, and the structures of the nervous system that receive the sense of balance that derives from them, the vestibular nerve and vestibular nuclei.

*Some of the terminology that mentions "labyrinthine ataxia" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…小脳性失調症における失調症状は筋緊張低下(ヒポトニーhypotonia),異なる筋群の間の協調障害(アジネルジーasynergia),随意筋収縮の開始の遅れdischronometriaなど,随意運動のコントロールに重要ないくつかの要素に対する障害が合わさって生ずるものと考えられている。
[迷路性失調症labyrinthine ataxia]
 起立歩行時の平衡障害のみを生じ,体肢の個々の運動や,言語の障害は認められない。これは内耳の迷路,とくに三半規管や前庭,およびそこに由来する平衡感覚を受容する神経系の構造である前庭神経や前庭神経核の病変によって生ずるものである。…

※「labyrinthine ataxia」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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