Uniaxial joint - Fig joint

Japanese: 1軸性関節 - いちじくせいかんせつ
Uniaxial joint - Fig joint

...Tendons are attachments of muscles rather than joints, and wherever muscles attach to bones, they do so via tendons (Figure 1).
[Joint classification and movement patterns]
Each joint performs various complex movements according to its purpose, but if we classify the joints in the whole body according to the type of movement they perform, we can divide them into three types: uniaxial joints, biaxial joints, and multiaxial joints. A uniaxial joint is a joint that can only flex and extend, such as the elbow joint, and in this case there is only one axis of movement, which runs horizontally across the elbow joint.

*Some of the terminology that refers to "uniaxial joints" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…腱は関節よりもむしろ筋肉の付属物で,筋肉が骨に付着するところでは必ず腱を介して骨に付着している(図1)。
[関節の分類とその運動様式]
 個々の関節は,その目的に応じていろいろ複雑な運動をするが,全身の関節をその運動様式によって分類すると,1軸性関節,2軸性関節,多軸性関節の3種に分けることができる。1軸性関節というのは,たとえば肘関節のように屈伸運動だけしかできない関節で,この場合の運動軸は一つだけで,それは肘関節を横切って水平に走る。…

※「1軸性関節」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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