Shoulder and Superficial Back Action

Question 1

Pectoralis major action (clavicular head)

Answer 1

Flexes humerus

Question 2

Pectoralis major action (sternocostal head)

Answer 2

Extends humerus

Question 3

Pectoralis major (both heads)

Answer 3

Adducts and medially rotates humerus

Question 4

Pectoralis major (both heads)

Answer 4

Pulls scapula inferiorly and anteriorly

Question 5

Pectoralis minor

Answer 5

Pulls scapula inferiorly and anteriorly, holds it against thoracic wall

Question 6

Subclavius

Answer 6

Anchors and depresses clavicles

Question 7

Serratus anterior

Answer 7

Protracts, rotates scapula, holds against thoracic wall

Question 8

Trapezius ascending part

Answer 8

Depresses scapula

Question 9

Trapezius descending part

Answer 9

Elevate scapula

Question 10

Trapezius (middle part = both asc. and desc.)

Answer 10

Retracts scapula

Question 11

Trapezius

Answer 11

Superiorly rotate glenoid cavity

Question 12

Latissimus dorsi

Answer 12

Extends, adducts and medially rotates humerus;

Raises body to arms when climbing

Question 13

Levator scapulae

Answer 13

Elevates scapula;

Rotates glenoid cavity inferiorly

Question 14

Rhomboids major and minor

Answer 14

Elevates scapula;
Retracts scapula;
Rotates glenoid cavity inferiorly

Question 15

Deltoids - Anterior/clavicular

Answer 15

Flexes and medially rotates arm

Question 16

Deltoids - Middle/acromial

Answer 16

Abducts arm

Question 17

Deltoids - Posterior/spinal

Answer 17

Extends and laterally rotates arm

Question 18

Teres major

Answer 18

Adducts and medially rotates the arm

Question 19

Teres minor

Answer 19

Laterally rotates arm

Question 20

Infraspinatus

Answer 20

Laterally rotates arm

Question 21

Subscapularis

Answer 21

Medially rotates arm;

Holds humerus in glenoid cavity

Question 22

Supraspinatus

Answer 22

Abducts arm (assists deltoids)

Question 23

Muscles of the rotator cuff

Answer 23

Teres minor, infraspinatus, supraspinatus, subscapularis

Question 24

Function of the rotator cuff

Answer 24

Holds humerus in the glenoid cavity