OIA Pectoral Girdle
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39 Terms
Where does the pectoralis minor originate
Ribs 3-5
Where does the pectoralis minor insert
Coracoid process of the scapula
What does the pectoralis minor do
downward rotation of the scapula
Where does the serratus anterior originate
anterior and lateral aspects of the upper 8-9 ribs
Where does the serratus anterior insert
Anterior surface of the medial border of the scapula
What does the serratus anterior do
Scapular abduction and upward rotation
Where does the subclavius originate
1st rib
Where does the subclavius insert
subclavian groove of the clavicle
what does the subclavius do
stabilizes the sternoclavicular (SC) joint
Where does the levator scapulae originate
Transverse process of C1-C4
Where does the levator scapulae insert
medial, superior vertebral border of the scapula
what does the levator scapulae do
scapular elevation and downward rotation
Where does the rhomboids (major and minor) originate
Spinous process of C7-T5
Where does the rhomboids (major and minor) insert
Medial border of the scapula
What does the rhomboids (major and minor) do
Scapular elevation, adduction (retraction), and downward rotation
Where does the trapezius originate
External occipital protuberance and spinous process of C7-T12
Where does the trapezius insert
Spine of the scapular, acromion process, and clavicle
What does the trapezius (upper, middle, lower, all) do
Upper- scapular elevation, middle-scapular adduction, lower- scapular depression, all- upward rotation
where does the pectoralis major originate
ribs 1-6, sternum, and medial half of the clavicle
Where does the pectoralis major insert
lateral lip of the intertubercular groove of the humerus
What does the pectoralis major do
shoulder flexion, adduction, and internal rotation
Where does the coracobrachialis originate
coracoid process of the scapula
where does the coracobrachialis insert
medial side of the humerus
what does the coracobrachialis do
shoulder flexion and adduction
where does the subscapularis orginate