Superior transverse scapular ligament

The superior transverse scapular ligament is a small but important ligament located in the shoulder region. It is one of the ligaments that helps to stabilize the scapula (shoulder blade) and plays a crucial role in the movement and function of the shoulder joint.

Anatomy

The superior transverse scapular ligament is a thin, flat band of fibrous tissue that spans across the suprascapular notch, a small depression on the superior border of the scapula. It connects the medial (inner) border of the scapula to the lateral (outer) border, forming a bridge-like structure.

The ligament is approximately 2-3 centimeters in length and 1-2 millimeters in width. It is positioned superiorly to the suprascapular nerve, which passes beneath it. The suprascapular artery also runs above the ligament.

Function

The main function of the superior transverse scapular ligament is to create a protective tunnel for the suprascapular nerve as it passes through the suprascapular notch. This ligament prevents compression or impingement of the nerve, ensuring its proper functioning.

Additionally, the ligament provides stability to the scapula by connecting its medial and lateral borders. This stability is crucial for the proper movement and positioning of the scapula during shoulder movements.

Clinical Significance

Injuries or abnormalities related to the superior transverse scapular ligament can have significant clinical implications. If the ligament is damaged or torn, it can lead to compression or entrapment of the suprascapular nerve, resulting in suprascapular neuropathy. This condition can cause pain, weakness, and loss of function in the shoulder and upper arm.

Diagnosis and Treatment

Diagnosing issues related to the superior transverse scapular ligament and suprascapular nerve can be challenging. A thorough physical examination, along with imaging studies such as magnetic resonance imaging (MRI) or ultrasound, may be necessary to identify any abnormalities.

Treatment options for injuries or conditions affecting the superior transverse scapular ligament and suprascapular nerve may include conservative measures such as rest, physical therapy, and pain management. In some cases, surgical intervention may be required to repair or release the ligament or decompress the nerve.

Related Topics

• Scapula: The shoulder blade bone to which the superior transverse scapular ligament is attached.
• Suprascapular Nerve: The nerve that passes beneath the superior transverse scapular ligament.
• Suprascapular Neuropathy: A condition caused by compression or entrapment of the suprascapular nerve.
• Shoulder Joint: The joint formed by the articulation of the scapula and the humerus.

References

1. Gray H. Anatomy of the Human Body. 20th ed. Philadelphia: Lea & Febiger; 1918. Available from: https://www.ncbi.nlm.nih.gov/books/NBK563232/ 2. Moore KL, Dalley AF, Agur AMR. Clinically Oriented Anatomy. 8th ed. Philadelphia: Wolters Kluwer; 2017.

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