Arterial Supply of Thoracic Wall

Question 0

Anterior Intercostals

Answer 0

Origin: internal thoracic arteries (intercostal spaces 1-6) and musculophrenic arteries (intercostal spaces 7-9)
Course: btw internal and innermost intercostal muscles
Distribution: intercostal muscles and overlying skin, pareital pleura

Question 1

Posterior Intercostals

Answer 1

Origin: supreme intercostal arteries (intercostal spaces 1&2) & thoracic aorta (remaining intercostal space)
Course: btw internal and innermost intercostal muscles
Distribution: intercostal muscles and overlying skin, parietal pleural

Question 2

Internal Thoracic Artey

Answer 2

Origin: Subclavian Artery
Course: passes inferiorly, laterally to sternum btw costal cartilages and internal intercostal muscles; divides into superior epigastric and musculophrenic arteries

Question 3

Subcostal

Answer 3

Origin: Thoracic Aorta
Course: along inferior border of 12th rib
Distribution: muscles of anterolateral abdominal wall and overlying skin