What is the proximal attachment of the palmaris longus?

The proximal attachment of the palmaris longus is at the medial epicondyle of the humerus. This point is significant as it serves as a common origin for several flexor muscles in the forearm, bringing attention to the functional anatomy of the wrist and hand. The medial epicondyle is the bony prominence located on the inner side of the elbow, which is critical for the muscles involved in flexion and pronation movements of the forearm.

The palmaris longus muscle plays an important role in wrist flexion and tenses the palmar aponeurosis, aiding in gripping activities. Understanding this attachment helps in identifying the muscle’s function, as well as its relevance in various clinical assessments, such as testing for muscle function or during procedures like grafting where the palmaris longus may be harvested.