…When the muscles of the limbs are in a state of tension and are passively bent or stretched, resistance is felt from the beginning. Unlike muscle spasms, this resistance is almost constant regardless of the speed of flexion or stretching, or the beginning and end of the movement, and is called the leadpipe phenomenon or plastic rigidity. It is generally seen in cases of disorders of the extrapyramidal system related to involuntary movement, and is often accompanied by involuntary movement or bradykinesia. … *Some of the terminology that refers to the "leadpipe phenomenon" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…四肢の筋肉が緊張状態にあって,それを他動的に曲げたり伸ばしたりするとき,当初から抵抗を感じる。その抵抗は,筋痙縮と異なり,屈曲,伸展の速さとか,動作の初めと終りなどの経過に関係なく,ほぼ一定であり,鉛管現象leadpipe phenomenonあるいは可塑性固縮plastic rigidityと呼ばれる。一般的には,不随意な運動に関係する錐体外路系の障害の際にみられ,不随意運動や寡動などを伴うことが多い。… ※「leadpipe phenomenon」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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