Rotator Cuff and arm Flashcards
Insertion of deltoid
Deltoid tuberosity of humerus
Origin of deltoid
Spine of scapula, acromion, lateral end of clavicle
Innervation of deltoid
Axillary nerve C5,C6
Action of deltoid
Anterior: flexes and medially rotates shoulder joint
Middle: abducts shoulder joint
Posterior: extens and laterally rotates shoulder joint
Origin of supraspinatus
Supraspinous fossa of scapula
Insertion of supraspinatus
Superior facet of greater tubercle
Innervation of supraspinatus
Suprascapular nerve C4,C5,C6
Action of supraspinatus
Initiates and assists deltoid in abduction of shoulder joint
Origin of infraspinatus
Infraspinatus fossa of scapula
Insertion of infrapsinatus
Middle facet of greater tubersity
Innervation of infraspinatus
Suprascapular C5 C6
Action of infraspinatus
Laterally rotates shoulder joint and helps hold humerus head and glenoid cavity of scapula
Origin of teres minor
Middle part of lateral border of scapula
Insertion of teres minor
Inferior facet of greater tuberosity
Innervation of teres minor
Axillary nerve C5 C6
Action of teres minor
Laterally rotate shoulder joint and helps hold humeral head in glenoid cavity of scapula
Origin of teres major
Inferior part of lateral border of scapula and posterior surface of inferior angle of scapula
Insertion of teres major
Medial lip of intertubercular sulcus of humerus
Innervation of teres major
Lower subscapular nerve C5 C6
Action of teres major
Adducts and medially rotates shoulder joint
Origin of subscapularis
Subscapular fossa
Insertion of subscapularis
Lesser tubercle of humerus