Muscle Details |
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Muscle | Origin | Insertion | Nerve supply | Action |
pectoralis major | medial half of clavicle
sternum costal cartilages aponeurosis of external oblique |
lateral lip of intertubercular sulcus | medial and lateral
pectoral nerves |
flexes, adducts,
and rotates arm medially |
pectoralis minor | anterior surface of
2nd thru 5th ribs |
coracoid process of
scapula |
medial pectoral nerve | protracts scapula
|
subclavius | costal cartilage
of first rib |
lower surface of clavicle | nerve to subsclavius | depresses lateral end of clavicle
pulls clavicular head into sternoclavicular joint |
serratus anterior | lateral surface of
1st to 8th or 9th ribs |
vertebral (medial)
border of scapula |
long thoracic | protract scapula
pulls it forward rotates scapula laterally |
teres minor | axillary (lateral)
border of scapula |
inferior aspect
greater tubercle of humerus |
axillary | rotates arm laterally |
teres major | posterior aspect
inferior angle of scapula |
crest of lesser tubercle
of humerus |
lower subscapular | adducts and
rotates arm medially |
latissimus dorsi | spinous processes
lower 6 vertebra thoracolumbar fascia iliac crest |
floor of intertubercular
fossa |
thoracodorsal | adducts, extends
medially rotates humerus |
Axillary vein
Axillary Lymph Nodes![]() |
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This is copyrighted©1999 by Wesley Norman, PhD, DSc |