Anterior intercostal branches

Anterior Intercostal Branches are a group of arteries that supply blood to the intercostal space, the area between the ribs. They are branches of the internal thoracic artery and the musculophrenic artery.

Anatomy

The anterior intercostal branches are divided into two sets. The first set, known as the superior anterior intercostal branches, are derived from the internal thoracic artery. They typically number six in total, supplying the first six intercostal spaces.

The second set, known as the inferior anterior intercostal branches, are derived from the musculophrenic artery. They typically number three in total, supplying the seventh, eighth, and ninth intercostal spaces.

Each anterior intercostal branch divides into two smaller branches, which run along the lower border of the corresponding rib, supplying blood to the intercostal muscles, parietal pleura, and overlying skin.

Clinical Significance

Understanding the anatomy of the anterior intercostal branches is crucial in several medical procedures, including thoracic surgery and interventional radiology. Damage to these arteries can result in significant bleeding and may lead to hemothorax or intercostal neuralgia.

See Also

• Posterior intercostal arteries
• Intercostal space
• Internal thoracic artery
• Musculophrenic artery