…A state of increased muscle tone. In muscle spasms, the muscles of the limbs are usually relaxed at rest, but when you try to passively stretch the muscles, you feel resistance (this is due to the stretch reflex), and as you increase the speed of stretching, the resistance increases accordingly. In other words, the stretch reflex is in an increased state. In a typical example, the clasp knife phenomenon is observed, where the resistance suddenly disappears when it becomes strong to a certain extent. *Some of the terminology that mentions "rigospasticity" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…筋緊張(筋トーヌス)の亢進した状態の一つ。筋痙縮では,安静時には四肢の筋肉はふつう弛緩した状態にあるが,他動的に筋肉を伸ばそうとすると抵抗を感じ(これは伸展反射stretch reflexによる),さらに伸展速度を増すとそれに伴って抵抗が強まる。つまり伸展反射の亢進した状態になっている。典型的な例では,ある程度抵抗が強くなったところで急激に抵抗がなくなる〈折りたたみナイフ現象clasp knife phenomenon〉がみられる。… ※「rigospasticity」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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