Muscle Movements (Shoulder)

Question 1

Pectoralis Major

Answer 1

Flexion, extension, adduction, internal rotation

Question 2

Pectoralis Minor

Answer 2

Depresses shoulder girdle, abducts scapula, elevates the ribs up during forced inspiration

Question 3

Deltoid (Anterior)

Answer 3

Flexion and medial rotation of humerus at the shoulder

Question 4

Deltoid (Middle)

Answer 4

Abducts humerus at the shoulder (as in upward flap)

Question 5

Deltoid (posterior)

Answer 5

Extension and lateral rotation of humerus at the shoulder

Question 6

Latissimus dorsi

Answer 6

Extension, adduction, horizontal abduction, medially rotates arm and shoulder, depresses scapula

Question 7

Trapezius

Answer 7

Extends the head, elevates, depresses, adducts and stabilizes the scapula

Question 8

Levator scapulae

Answer 8

Elevates the scapula, assists the trapezius

Question 9

Serratus anterior

Answer 9

Pulls shoulder anteriorly to prevent winging out of shoulder blade

Question 10

Rhomboid major and minor

Answer 10

Retract scapula (squaring shoulders), rotates glenoid cavity downwards (lowering arm against resistence), stabilize scapula

Question 11

Supraspinatus

Answer 11

Abducts humerus (assists) (elevates the shoulder joint out to the side)

Question 12

Infraspinatus

Answer 12

Externally rotates shoulder (lateral)

Question 13

Teres minor

Answer 13

Externally rotates shoulder (lateral)

Question 14

Subscapularis

Answer 14

Internally rotates shoulder (medial) (allows humerus to move freely during elevation of the arm)