2023年10月30日 · The long thoracic nerve is a motor nerve that provides innervation to the serratus anterior muscle. This muscle pulls the scapula anteriorly, allowing for anteversion of the arm, and elevates the ribs, assisting in respiration .

The long thoracic nerves solely innervates the serratus anterior muscle which is primarily responsible for shoulder protraction. It also works with trapezius to provide sustained upward rotation of scapula which is needed for overhead lifting [1].

2023年9月30日 · Course of the long thoracic nerve. The long thoracic nerve supplies motor innervation to the serratus anterior muscle. This muscle rotates the scapula, allowing the arm to be raised over 90 degrees. It also holds the scapula against the ribcage.

The long thoracic nerve arises from the anterior rami of cervical spinal nerves C5, C6, and C7. [1] [2] [3] The root from C7 may occasionally be absent. [4]The roots from C5 and C6 pierce through the scalenus medius, while the C7 root passes in front of the muscle.

2023年7月24日 · The serratus anterior intermediate is innervated by the long thoracic nerve, while the inferior segment receives innervation from two sources, namely the long thoracic nerve and a branch of the intercostal nerve.

2016年10月19日 · Anatomy of Long Thoracic Nerve: Innervation. serratus anterior ; Origin. long thoracic nerve is derived from ventral rami of C5, C6, C7 roots of brachial plexus . C8 contribution in 8% of patients; Course. runs downward & pases anterior to scalenus posterior muscle ; courses distal and laterally deep to clavicle and superficial to first and ...

2021年8月2日 · The nerve descends posterior to the roots of the brachial plexus and anterior to the scalenus posterior muscle and has a long course along the chest wall in the mid-axillary line to lie on the superficial surface of the serratus anterior muscle, which it innervates.

2025年1月20日 · The long thoracic nerve is a nerve that originates from the brachial plexus and primarily provides motor innervation to the serratus anterior muscle. This muscle plays a crucial role in the protraction and upward rotation of the scapula , enabling movements like …

The long thoracic nerve arises from the anterior rami of the fifth to seventh cervical nerves (the C5, C6, and C7 roots of the brachial plexus). Fibers from each of these three roots break off in the neck and merge to form the long thoracic nerve.

2021年3月9日 · Anatomy arises from the 5th, 6th, and 7th cervical nerve roots that innervates the . serratus anterior muscle; the long thoracic nerve is a pure motor nerve ; Clinical correlat e injury to the long thoracic nerve results in