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Chest Muscles
Chest Muscles
4
Anatomy
Graduate
01/31/2009
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Term
[image]
 Definition
Pectoralis Major
 
O: Clavicular Head: medial 1/2 of clavicle
Sternal Head: sternum, cartilages of superior 6 ribs
 
I:  Lateral lip of bicipital (intertubercular) groove of humerus
 
A: Adduction, horizontal adduction, and medial rotation of humerus
Clavicular head: flexion of humerus
Sternal head: extension of humerus from flexed position
 
N:  Clavicular head: Lateral pectoral nerve (C5,6,7)
Sternal head: Medial pectoral nerve (C8,T1)
 
B:  Pectoral Artery
Term
[image]
 Definition
Pectoralis Minor
 
O: Anterior surface of ribs 3,4,5 near costal cartilage
 
I: Medial border of superior surface of coracoid process
 
A:  Protraction, depression, downward rotation of scapula
 
N: Medial pectoral nerve (C8,T1)
 
B: Pectoral artery
Term
[image]
 Definition
Serratus Anterior
 
O: Outer surface of upper 8 ribs (by finger-like slips)
 
I: Anterior side of scapula along vertebral border
 
A: Protraction, upward rotation, and stablization of scapula against chest wall
 
N: Long thoracic nerve (C5,6,7)
 
B: Lateral thoracic artery
Term
[image]
 Definition
Subclavius
 
O: 1st rib costocartilage junction
 
I: Inferior shaft of clavicle, medial 1/3
 
A: Stabilization of clavicle by moving it medially
 
N: Nerve to subclavius (C5,6)
 
B: Clavicular branch of thoracoacromial trunk
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