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前臂后区
学习目标
完成本学习单元后，你将学会：
- 列举前臂的浅层伸肌。
- 列举前臂的深层伸肌。
- 熟悉前臂各伸肌的附着点、神经支配及功能。
浏览图谱
前臂后群肌肉也称为伸肌、旋后肌，分为两部分：
-
浅层肌肉：桡侧腕长伸肌、桡侧腕短伸肌、指伸肌、小指伸肌及尺侧腕伸肌。
- 深层肌肉：旋后肌、拇长展肌、拇短伸肌、拇长伸肌及示指伸肌。
大部分浅层肌肉共同起于肱骨外上髁，深层肌肉通常起自尺骨远端，它们均由桡神经的分支支配。
:watermark(/images/watermark_5000_10percent.png,0,0,0):watermark(/images/logo_url.png,-10,-10,0):format(jpeg)/images/overview_image/295/9DlpNSOmfDFmkEF78N6GAg_extensors-of-the-forearm-superficial-layer_cn.jpg){kind=logo}
:watermark(/images/watermark_5000_10percent.png,0,0,0):watermark(/images/logo_url.png,-10,-10,0):format(jpeg)/images/overview_image/3882/zvsFfR3QDBRWXha0zMfOQ_extensors-of-the-forearm-deep-layer_cn.jpg){kind=logo}
在本图谱中逐一观察前臂伸肌。
:watermark(/images/watermark_only.png,0,0,0):watermark(/images/logo_url.png,-10,-10,0):format(jpeg)/images/learnable/brachioradialis-muscle-10/0oxPjyrJlbXSpGoSPC3vEQ_Brachioradialis.png "肱桡肌 (Brachioradialis muscle)；图像：Yousun Koh"){kind=logo}
:watermark(/images/watermark_only.png,0,0,0):watermark(/images/logo_url.png,-10,-10,0):format(jpeg)/images/learnable/extensor-carpi-radialis-longus-muscle-9/u9UuetgAL3Vlq3VFDTTMw_Extensor_carpi_radialis_longus.png "桡侧腕长伸肌 (Extensor carpi radialis longus muscle)；图像：Yousun Koh"){kind=logo}
:watermark(/images/watermark_only.png,0,0,0):watermark(/images/logo_url.png,-10,-10,0):format(jpeg)/images/learnable/extensor-carpi-radialis-brevis-muscle-8/Wi4oLtHOu91NumS6o6ptA_Extensor_carpi_radialis_brevis.png "桡侧腕短伸肌 (Extensor carpi radialis brevis muscle)；图像：Yousun Koh"){kind=logo}
:watermark(/images/watermark_only.png,0,0,0):watermark(/images/logo_url.png,-10,-10,0):format(jpeg)/images/learnable/extensor-digitorum-muscle-6/mW22UCkG0hwGeDESvRong_Extensor_digitorum.png "指伸肌 (Extensor digitorum muscle)；图像：Yousun Koh"){kind=logo}
:watermark(/images/watermark_only.png,0,0,0):watermark(/images/logo_url.png,-10,-10,0):format(jpeg)/images/learnable/extensor-carpi-ulnaris-muscle-8/0POKQ3WQcwKpxVScLsC5g_Extensor_carpi_ulnaris_muscle.png "尺侧腕伸肌 (Extensor carpi ulnaris muscle)；图像：Yousun Koh"){kind=logo}
:watermark(/images/watermark_only.png,0,0,0):watermark(/images/logo_url.png,-10,-10,0):format(jpeg)/images/learnable/extensor-digiti-minimi-muscle-5/bkfgHFWlFTH05IifN7V42A_Extensor_digiti_minimi.png "小指伸肌 (Extensor digiti minimi muscle)；图像：Yousun Koh"){kind=logo}
:watermark(/images/watermark_only.png,0,0,0):watermark(/images/logo_url.png,-10,-10,0):format(jpeg)/images/learnable/supinator-muscle-4/VHGcjfu1B2OrWh07th4nkQ_Supinator.png "旋后肌 (Supinator muscle)；图像：Yousun Koh"){kind=logo}
:watermark(/images/watermark_only.png,0,0,0):watermark(/images/logo_url.png,-10,-10,0):format(jpeg)/images/learnable/abductor-pollicis-longus-muscle-7/5d4JBV1TPWExAJJFmu2g_Abductor_policis_longus.png "拇长展肌 (Abductor pollicis longus muscle)；图像：Yousun Koh"){kind=logo}
:watermark(/images/watermark_only.png,0,0,0):watermark(/images/logo_url.png,-10,-10,0):format(jpeg)/images/learnable/extensor-pollicis-longus-muscle-5/ENJzH4f4VTZLGkKSfpg5w_Extensor_pollicis_lognus.png "拇长伸肌 (Extensor pollicis longus muscle)；图像：Yousun Koh"){kind=logo}
:watermark(/images/watermark_only.png,0,0,0):watermark(/images/logo_url.png,-10,-10,0):format(jpeg)/images/learnable/musculus-extensor-pollicis-brevis/DbuZP4fGs8BYujWKU4xgA_Extensor_pollicis_brevis.png "拇短伸肌 (Extensor pollicis brevis muscle)；图像：Yousun Koh"){kind=logo}
:watermark(/images/watermark_only.png,0,0,0):watermark(/images/logo_url.png,-10,-10,0):format(jpeg)/images/learnable/extensor-indicis-muscle-5/unidOpZwxyHwB76BwjXhQ_Extensor_indicis.png "示指伸肌 (Extensor indicis muscle)；图像：Yousun Koh"){kind=logo}
肱桡肌
Brachioradialis muscle
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同义词：
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进行测验
看完视频后，准备好进行以下测验来测试和巩固前臂伸肌的知识吧！
下载下方的标注练习，学习前臂后群肌肉。
小结
| 浅层肌肉 | 桡侧腕长伸肌、桡侧腕短伸肌、指伸肌、尺侧腕伸肌和小指伸肌 |
| 深层肌肉 | 旋后肌、拇长展肌、拇短伸肌、拇长伸肌和示指伸肌 |
| 神经支配 | 浅层肌肉：桡神经（C5~C8） 深层肌肉：桡神经深支（骨间后神经）（C7~C8） |
| 功能 | 控制手和手指伸展 |
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