Thoracic Outlet (MA)

Question 1

Scalene triangle

Answer 1

Formed by the anterior scalene, middle scalene and the 1st rib

• Neurovascular structures such as the superior portions of the brachial plexus and subclavian artery transitions through this space.

Question 2

Subpectoral space

Answer 2

Formed by insertion of pectoralis minor and 3rd-5th ribs
Contains: neurovascular structures such as the axillary artery, cords of the brachial plexus and the axillary vein

Question 3

Costoclavicular space

Answer 3

Formed by the clavicle, subclavius, 1st and 2nd rib
Contains:
-Brachoal plexus
-Axillary artery
Axillary vein