Long thoracic nerve

Long Thoracic Nerve

The Long Thoracic Nerve is a nerve in the human body that supplies the Serratus Anterior Muscle. It originates from the roots of the brachial plexus, specifically from the fifth, sixth, and seventh cervical nerves (C5, C6, C7). The Long Thoracic Nerve is responsible for the protraction of the scapula, allowing the arm to move away from the midline of the body.

Anatomy

The Long Thoracic Nerve descends through the neck and into the axilla. It is relatively superficial, making it susceptible to injury. It passes over the first rib and then descends on the surface of the Serratus Anterior Muscle, which it innervates.

Function

The primary function of the Long Thoracic Nerve is to supply the Serratus Anterior Muscle. This muscle is responsible for the protraction and upward rotation of the scapula, which allows for movements such as reaching and pushing.

Clinical Significance

Injury to the Long Thoracic Nerve can result in a condition known as Winged Scapula. This condition is characterized by the inability to protract and rotate the scapula, leading to difficulties in lifting, pulling, and pushing objects.

See Also

• Brachial Plexus
• Serratus Anterior Muscle
• Winged Scapula

References

Long thoracic nerve Resources
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