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HIGH SCHOOL

Biology

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Anatomy and Physiology

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The Muscular System

Forearm Muscles for Elbow and Rotation

Description

Forearm muscles help the arm bend, straighten, and rotate at the elbow and radioulnar joints. They are grouped as forearm flexors, forearm extensors, forearm pronators, and forearm supinators. The flexors and extensors act on the elbow joint. The pronators and supinators act on the radioulnar joints.

Transcript

运动前臂的肌肉在肘关节处屈曲和伸展,在桡尺关节处旋前和旋后。

肱二头肌、肱肌和肱桡肌是前臂屈肌。

肱二头肌是一块位于上臂前侧的双头肌肉,可屈曲肘关节并使前臂旋后。

肱肌位于肱二头肌正下方,有助于肘关节屈曲。

肱桡肌位于前臂外侧。它可屈曲肘关节,并引起前臂的旋前和旋后。

肱三头肌和肘肌是前臂的伸肌。

肱三头肌是位于上臂后侧的一个具有三个头的肌肉。它可伸展肘关节处的前臂以及肩关节处的上肢。

肘关节处的肘肌是一块较小的三角形肌肉,可伸展前臂。

旋前圆肌和旋前方肌均有助于在桡尺关节处使前臂旋前,而旋后肌则在桡尺关节处使前臂旋后。

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