Thoracoacromial artery

Thoracoacromial artery is a short trunk that arises from the second part of the axillary artery, its origin being generally overlapped by the upper edge of the pectoralis minor.

Origin and Course

The thoracoacromial artery arises from the second part of the axillary artery. It passes forward, underneath the pectoralis minor, and divides into several branches. These branches include the pectoral, acromial, clavicular, and deltoid branches.

Branches

The thoracoacromial artery gives off several branches, which are named according to the areas they supply:

• Pectoral branch: This branch supplies the pectoralis major and pectoralis minor muscles.
• Acromial branch: This branch supplies the acromion, a part of the scapula that forms the highest point of the shoulder.
• Clavicular branch: This branch supplies the clavicle, also known as the collarbone.
• Deltoid branch: This branch supplies the deltoid muscle, a large, triangular muscle covering the joint of the shoulder.

Clinical Significance

The thoracoacromial artery is an important artery in the upper body, supplying blood to several major muscles and bones. Damage to this artery can lead to significant blood loss and potentially life-threatening complications. It is also a key landmark in surgical procedures involving the shoulder and upper chest.

See Also

• Axillary artery
• Pectoralis major
• Pectoralis minor
• Acromion
• Clavicle
• Deltoid muscle

References

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  Diagram showing the branches of the axillary artery, including the thoracoacromial artery.
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  Illustration of the axillary artery and its branches, highlighting the thoracoacromial artery.
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  Anatomical drawing of the shoulder region, featuring the thoracoacromial artery.