5/27 scapulohumeral muscles

Question 1

deltoid

Answer 1

PA

• lateral third of clavicle
• acromion
• spine

DA
-deltoid tuberocity of humerus

I
-Axillary C5

A
clavicular/ant
-flexes,medial rotate sj
acromial/middle
-abduct sj
spinal 
-extends, lateral rotates sj

Question 2

supraspinatus

Answer 2

PA
-supraspinous fossa

DA
-superior of greater tubercle

I
-suprascapular nerve C5

A
-initiate and asist deltoid in abduction
-act with other rotator cuff muscles
l

Question 3

infraspinatus

Answer 3

PA
-infraspinous fossa

DA
-middle facet of greater tubercle of humerus

I
-supraspular nerve C5

A

• laterally rotate sj
• help hold humeral head in gc

Question 4

teres minor

Answer 4

PA
-middle part of lateral border scapula

DA
-inferior facet of greater tubercle

I
-axillary nerve C5

A
-laterally rotate sj
-help hold humeral head in gc
(same as infraspinatus)

Question 5

teres major

Answer 5

PA

• inf part of lateral border of scapula
• pos surface of inf angle of scapula

DA
-medial lip of intertubercular sulcus of humerus

I
-lower subscapular nerve C6

A
-adduct and medial rotate sj

Question 6

subscapularis

Answer 6

PA
-subscapular fossa

DA
-lesser tubercle of humerus

I
-upper and lower subscapular nerves C6

A

• medially rotate and adducts sj
• hold head of humerus in gc of scapula