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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Knuckle ： ウィキペディア英語版 Knuckle The knuckles are the joints of the fingers which are brought into prominence when the hand is clenched and a fist is made. The word is cognate to similar words in other Germanic languages, such as the Dutch "Knokkel" (knuckle) or German "Knöchel" (ankle), i.e., ''Knöchlein'', the diminutive of the German word for bone (''Knochen''). Anatomically, it is said that the knuckles consist of the metacarpophalangeal〔Utah Mountain Biking; (Thumb Sprain ); First as metacarpo.〕 (MCP) and interphalangeal (IP) joints of the finger. The knuckles at the base of the fingers may be referred to as the 1st〔 or major knuckles while the knuckles at the midfinger are known as the 2nd〔(Second knuckle as thumb's interphalangeal, "anchor knuckle" as metacarpophalangeal )〕 and 3rd, or minor, knuckles. However, the ordinal terms are used inconsistently, and can be found referring to any of the knuckles.〔(First knuckle as thumb's interphalangeal )〕〔(First knuckle as distal interphalangeal )〕 The physical mechanism behind the popping or cracking sound heard when cracking joints such as knuckles is still uncertain, although it is widely believed to be caused by synovial fluid filling the vacuum left by the joint's displacement.〔Johns Hopkins Arthritis Center, (Knuckle Cracking and Arthritis )〕 == Gallery == File:Knuckles.jpg|Clenched fist with knuckles (encircled in red) File:MotorcycleRacingGlove.jpg|Motorcycle racing gloves with titanium knuckle protectors 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Knuckle」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.