翻訳と辞書 Words near each other ・ Dorsal cutaneous branches ・ Dorsal cutaneous nerve ・ Dorsal digital arteries ・ Dorsal digital arteries of foot ・ Dorsal digital arteries of hand ・ Dorsal digital nerves ・ Dorsal digital nerves of foot ・ Dorsal digital nerves of radial nerve ・ Dorsal digital nerves of ulnar nerve ・ Dorsal digital veins ・ Dorsal digital veins of the foot ・ Dorsal fin ・ Dorsal intercarpal ligament ・ Dorsal intercuneiform ligaments ・ Dorsal interossei of the foot ・ Dorsal interossei of the hand ・ Dorsal ligament ・ Dorsal lingual veins ・ Dorsal longitudinal fasciculus ・ Dorsal mesentery ・ Dorsal metacarpal arteries ・ Dorsal metacarpal veins ・ Dorsal metatarsal arteries ・ Dorsal metatarsal artery ・ Dorsal metatarsal ligaments ・ Dorsal metatarsal veins ・ Dorsal metro station ・ Dorsal nasal artery ・ Dorsal nerve ・ Dorsal nerve cord Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Dorsal interossei of the hand ： ウィキペディア英語版 Dorsal interossei of the hand In human anatomy, the dorsal interossei (DI) are four muscles in the back of the hand that act to abduct (spread) the index, middle, and ring fingers away from hand's midline (ray of middle finger) and assist in flexion at the metacarpophalangeal joints and extension at the interphalangeal joints of the index, middle and ring fingers. ==Structure== There are four dorsal interossei in each hand. They are specified as 'dorsal' to contrast them with the palmar interossei, which are located on the anterior side of the metacarpals. The dorsal interosseous muscles are bipennate, with each muscle arising by two heads from the adjacent sides of the metacarpal bones, but more extensively from the metacarpal bone of the finger into which the muscle is inserted. They are inserted into the bases of the proximal phalanges and into the extensor expansion of the corresponding extensor digitorum tendon. The middle digit has two dorsal interossei insert onto it while the second digit (index) and the fifth digit (little finger) have none. Each finger is provided with two interossei (palmar or dorsal), with the exception of the little finger, in which the abductor digiti minimi muscle takes the place of one of the dorsal interossei.〔''Gray's Anatomy'' 1918, see infobox〕 The first dorsal interosseous muscle is larger than the others. Between its two heads, the radial artery passes from the back of the hand into the palm. Between the heads of dorsal interossei two, three, and four, a perforating branch from the deep palmar arch is transmitted.〔 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「Dorsal interossei of the hand」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.