Pectoralis major (sternal head)
Related Anatomy
Nerve
Medial pectoral nerve
Plexus
Brachial plexus
Muscle Action
Shoulder extension
Shoulder adduction (transverse)
Shoulder adduction
Shoulder flexion (transverse)
Nerve Root
C7
C8
T1
Brachial Plexus Trunk
Lower trunk
Brachial Plexus Cord
Medial cord
Brachial Plexus Division
Anterior division