Shoulder joint Flashcards
six scapulohumeral muscles
- subscapularis
- supraspinatus
- infraspinatus
- teres major
- teres minor
- deltoid
rotator cuff SITS muscles
- supraspinatus
- infraspinatus
- teres minor
- subscapularis
function of SITS muscles
to hold the humeral head in the glenoid cavity of the scapula
supraspinatus origin
supraspinous fossa of scapula
supraspinatus insertion
superior facet of greater tubercle of humerus
goes through capsule of shoulder joint
supraspinatus innervation
suprascapular nerve
supraspinatus action
- aids deltoid in abduction of arm
- stabilises shoulder joint
- acts with rotator cuff muscles
infraspinatus origin
infraspinous fossa of scapula
infraspinatus insertion
- middle facet of greater tubercle of humerus
- through capsule of shoulder joint
infraspinatus innervation
suprascapular nerve
infraspinatus action
- lateral rotation of humerus
- stabilises shoulder joint
- acts with rotator cuff muscles
teres minor origin
middle part of lateral border of scapula
teres minor insertion
- inferior facet of greater tubercle of humerus
- through capsule of shoulder joint
teres minor innervation
axillary nerve
teres minor action
- lateral rotation of humerus
- stabilises shoulder joint
- acts with rotator cuff muscle
subscapularis origin
subscapular fossa
subscapularis insertion
- lesser tubercle of humerus
- fuses with capsule of shoulder joint
subscapularis innervation
subscapular nerve