碳弯头支持是一个epicondyle.of the肱骨人类上臂的骨头。它比越来越突出侧面髁并在后面稍微定向anatomical position。在鸟儿中，与其他人相比，胳膊有点旋转Tetrapods.，它被称为肱骨腹部髁。在比较解剖学中，中立的术语越多entepicondyle.is used.

内侧髁上依附于附件ulnar collateral ligament of elbow joint，到了pronator teres那and to a common tendon of origin (the普通屈肌肌腱）一些屈肌肌肉的肌肉forearm： 这屈肌Carpi Radialis.， 这屈肌Carpi ulnaris.， 这屈肌Digitorum Supervicialis.，而且palmaris longus。

这ulnar神经在这个髁下的凹槽中运行。内侧髁上保护尺神经。尺神经是脆弱的，因为它沿着骨头靠近表面靠近表面。醒目的内侧髁在尺神经中导致刺痛感。这种响应被称为引人注目的“有趣的骨头”。^[1]这name funny bone could be from a play on the words humorous and humerus, the bone on which the medial epicondyle is located.^{[需要引用]}这medial epicondyle is located on the distal end of the humerus. Additionally, the medial epicondyle is inferior to the内侧宿舍岭山脊。It is also proximal to the奥兰克龙窝。