pectoral muscles
subclavius origin
1st costal cartilage
pectoralis major action
adducts and medially rotates arm
serratus anterior insertion
anterior medial border and inferior angle of scapula
pectoralis major origin
clavicle, sternum, 1-6 costal cartilage
pectoralis minor insertion
coracoid process of scapula
subclavius action
depresses and steadies clavicle
serratus anterior action
draws scapula around and forward
subclavius insertion
inferior surface of clavicle
pectoralis major insertion
lateral lip of intertubercular (bicipital) groove of humerus
serratus anterior innervation
long thoracic n
pectoralis minor innervation
medial pectoral n (C8/T1)
pectoralis major innervation
medial pectoral n (C8/T1) lateral pectoral n (C5/6/7)
subclavius innervation
nerve to subclavius (superior trunk of brachial plexus C5/6)
pectoralis minor action
pulls shoulder down and forward (protraction)
serratus anterior origin
ribs 1-8
pectoralis minor origin
ribs 3-5
