Shoulder Flashcards
Supraspinatus O
supraspinatus fossa of scapula
Supraspinatus I
superior facet of greater tubercle of humerus
Supraspinatus Innervation
suprascapular nerve C4, C5, C6
Supraspinatus Action
Initiates and assists deltoid in abduction of shoulder joint and acts with other rotator muscles
Infraspinatus O
infraspinous fossa of scapula
Infraspinatus I
middle facet of greater tubercle of humerus
Infraspinatus Innervation
suprascapular nerve C5, C6
Infraspinatus Action
Laterally rotate shoulder joint; help hold humeral head in glenoid cavity of the scapula
Subscapularis O
subscapular fossa (most of anterior surface of scapula)
Subscapularis I
lesser tubercle of humerus
Subscapularis Innervation
upper and lower subscapular nerves (C5, C6, C7)
Subscapularis Action
medially rotates and adducts shoulder joint, helps hold humeral head in glenoid cavity.
Teres Minor O
middle part of the lateral border of scapula
Teres Minor I
inferior facet of greater tubercle of humerus
Teres Minor Innervation
axillary nerve C5, C6
Teres Minor Action
Laterally rotate shoulder joint; help hold humeral head in glenoid cavity of the scapula
Teres Major O
inferior part of lateral border of scapula and posterior surface of inferior angle of scapula
Teres Major I
medial lip of intertubercular sulcus of the humerus
Teres Major Innervation
lower subscapular nerve C5 C6
Teres Major Action
aducts and medially rotates shoulder joint
Deltoid O
lateral third of clavicle, acromion and spine of scapula
Deltoid I
deltoid tuberosity of humerus
Deltoid Innervation
axillary nerve C5, C6
Deltoid Action
Clavicular (action): part flexes and medially rotates shoulder joint; acromial (middle part abducts shoulder joint; spinal (posterior) part extends and laterally rotates shoulder joint
