Test 7

Question 0

Latissimus dorsi

Answer 0

Origin: spines T7-L5
Insertion: intertubercle sulcus of humerus
Action: extends, adducts, medially rotates arm at shoulder joint, draws arm inferiorly and posteriorly. RMA: elevates vc and torso

Question 1

Pectoralis major

Answer 1

Origin: clavicle, sternum, costal cartilage 2-6 ribs and 7
Insertion: greater tubercle and lateral lip of intertubercle sulcus of humerus
Action: adducts and medially rotates arm at shoulder joint

Question 2

Deltoid

Answer 2

Origin: acromial of clavicle, acromion of scapula and spine of scapula
Insertion: deltoid tuberosity of humerus
Action: lateral fibers adduct arm at shoulder joint, anterior fibers flex and medially rotate arm at shoulder joint, posterior fibers extend and laterally rotate arm at shoulder joint

Question 3

Subscapularis

Rotator cuff

Answer 3

Origin: subscapular fossa of scapula
Insertion: lesser tubercle of humerus
Action: medially rotates arm at shoulder joint

Question 4

Supraspinatus

Rotator cuff

Answer 4

Origin: supraspinous fossa of scapula
Insertion: greater tubercle of humerus
Action: assists deltoid muscle in abducting arm at shoulder joint

Question 5

Infraspinatus

Rotator cuff

Answer 5

Origin: infraspinous fossa of scapula
Insertion: greater tubercle of humerus
Action: laterally rotates arm at shoulder joint

Question 6

Teres major

Answer 6

Origin: inferior angle of scapula
Insertion: medial tip of intertubercle sulcus of humerus
Action: extends arm at shoulder joint and assists in adduction and medial rotation of arm at shoulder joint

Question 7

Teres minor

Rotator cuff

Answer 7

Origin: inferior lateral border of scapula
Insertion: greater tubercle of intertubercle sulcus of humerus
Action: laterally rotates and extends arm at shoulder joint

Question 8

Coracobrachialis

Answer 8

Origin: coracoid process of scapula
Insertion: middle of medial surface of shaft of humerus
Action: flexes and adducts arm at shoulder joint