Thoracoacromial artery

The thoracoacromial artery is a vessel arising from the axillary artery at the axilla.

Summary

Gross anatomy

Origin

The thoracoacromial artery arises from the second part of the axillary artery located posterior to the pectoralis minor muscle 2. It is the first of two arterial branches which arise from the second part of the axillary artery 1. With the second part being the lateral thoracic artery 1

Termination

The thoracoacromial artery travels a short course deep to the medial border of the pectoralis minor muscle and then passes through the clavipectoral fascia. It then divides into four branches including the clavicular, acromial, pectoral, and deltoid branches 2.

Branches

The thoracodorsal typically has 4 distinct branches:

  • clavicular
  • acromial
  • pectoral
  • deltoid

See this mnemonic for the branches.

Supply

Through its four main branches, the thoracoacromial artery contributes arterial supply to the pectoralis major and minor muscles, the anterior part of the deltoid muscle, and dermal sensation overlying the clavipectoral fascia 2

Upper limb anatomy
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Article information

rID: 47264
Section: Anatomy
Synonyms or Alternate Spellings:

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Cases and figures

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    Figure 1: illustration
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    Figure 2: axillary anatomy (Gray's illustration)
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