Supraclavicular Part of Brachial Plexus (Left)

Description

The brachial plexus may be divided into infraclavicular and supraclavicular parts depending on its relationship with the clavicle.

The supraclavicular part of the brachial plexus includes the roots, trunks, and divisions, and their terminal branches.

Supraclavicular branches arising from the roots include:

—nerves to the scalene and longus colli muscles, which arise from the lower anterior rami of the cervical nerves (C5—C8) near their exit from the intervertebral foramina;

—branch from the anterior ramus of the fifth cervical nerve to the phrenic nerve (C5);

—dorsal scapular nerve from the anterior ramus of the fifth cervical nerve;

—long thoracic nerve from the anterior rami of the fifth to seventh cervical nerves (C5-C7).

Supraclavicular branches that arise from the trunks of the brachial plexus branch from the superior trunk and include:

—subclavian nerve, which arises near the junction of the anterior rami of the fifth and sixth cervical nerves;

—suprascapular nerve.