檢視示指伸肌的原始碼

{| class="wikitable" align="right"

|-

| style="background: #008080" align= center|  '''<big>示指伸肌</big> '''

|-

| 

[[File:U=4133574236,1773496656&fm=26&gp=0.jpg|缩略图|居中|[https://ss0.bdstatic.com/70cFuHSh_Q1YnxGkpoWK1HF6hhy/it/u=4133574236,1773496656&fm=26&gp=0.jpg 原图链接][https://image.baidu.com/search/detail?ct=503316480&z=0&ipn=d&word=%E7%A4%BA%E6%8C%87%E4%BC%B8%E8%82%8C&step_word=&hs=0&pn=0&spn=0&di=12100&pi=0&rn=1&tn=baiduimagedetail&is=0%2C0&istype=0&ie=utf-8&oe=utf-8&in=&cl=2&lm=-1&st=undefined&cs=4133574236%2C1773496656&os=1723192155%2C2091827570&simid=3414887817%2C214117750&adpicid=0&lpn=0&ln=139&fr=&fmq=1605077600703_R&fm=&ic=undefined&s=undefined&hd=undefined&latest=undefined&copyright=undefined&se=&sme=&tab=0&width=undefined&height=undefined&face=undefined&ist=&jit=&cg=&bdtype=0&oriquery=&objurl=http%3A%2F%2F1.im.guokr.com%2FwTd1JFEhpimUNIwUgLLvzl9BbVSdgKgLhwdWGJ_ifHT5AAAA_wEAAEpQ.jpg&fromurl=ippr_z2C%24qAzdH3FAzdH3Fooo_z%26e3B275h6_z%26e3Bv54AzdH3Fw6ptvsjAzdH3F99a08nAzdH3F%3Fu%3Dox&gsm=1&rpstart=0&rpnum=0&islist=&querylist=&force=undefined 来自 百度 的图片]]]

|-

| style="background: #008080" align= center|

|-

| align= light|
|}
也称“食指伸肌”，示指由三节指骨、一节掌骨构成。在解剖学中，示指伸肌在尺骨与桡骨之间。前臂后群肌可分为浅、深两层，前臂后群深层肌有五块。示指伸肌extensorindicis位于旋后肌的下方，示指伸肌在拇长伸肌起点下方起自尺骨和骨间膜，肌束向下移行为长腱，在指伸肌腱深面通过骨纤维鞘，移行为示指指背腱膜，有伸示指掌指关节和指关节的作用，由桡神经(C5～C8)支配。