PERFORATING BRANCHES OF ANTERIOR INTERCOSTAL ARTERIES

 

 

ORIGIN: Internal thoracic artery.

 

COURSE/DISTRIBUTION:  These are branches from the internal thoracic artery given off at the upper 5 or 6 intercostal spaces, which accompany the anterior cutaneous branches of the intercostal nerves. They pierce the pectoralis major to supply the skin lying on top of it. In females the perforating branches of 2nd 4th supply the breast and are therefore enlarged during lactation.

BRANCHES:

  • Mammary branches.

 

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