Shoulder

Question 1

Heads of the pectoralis major

Answer 1

Clavicular and sternocostal

Question 2

Muscles defining the axilla

Answer 2

Pectoralis major, Latissimus dorsi, teres major

Question 3

The groove in which the cephalic vein runs

Answer 3

Delto-pectoral groove

Question 4

Muscles between which the cephalic vein runs

Answer 4

Deltoids and pectoralis major

Question 5

The vessel that lies in the delto-pectoral groove

Answer 5

Cephalic vein

Question 6

The two heads of the pectoralis major can act independently. T/F

Answer 6

T

Question 7

Muscle covering the pectoralis minor

Answer 7

Pectoralis major

Question 8

Actions of the pectoralis major

Answer 8

Adduction and medial rotation of the arm; draws scapula anteriorly and inferiorly

Clavicular head: flexes humerus
Sternal head: extends humerus from flexed position

Question 9

Actions of the pectoralis minor

Answer 9

Draws scapula anteriorly and inferiorly

Question 10

Action of subclavius

Answer 10

Anchors and depresses clavicle

Question 11

Action of serratus anterior

Answer 11

Protraction of the scapula, upward rotation of the scapula; For punching or reaching anteriorly

Question 12

Insertion of the serratus anterior

Answer 12

Medial border of scapula

Question 13

Boxer’s muscle

Answer 13

Serratus anterior

Question 14

The fibers of the trapezius are divided into how many parts?

Answer 14

Three

Question 15

Action of the trapezius

Answer 15

Descending part: elevates scapula, upward rotates scapula
Ascending part: depresses scapula, upward rotates scapula
Middle part: retracts scapula

Question 16

Insertion of the trapezius

Answer 16

Lateral third of clavicle; acromion and spine of scapula

Question 17

Weakness of trapezius muscle causes drooping of sholders. T/F

Answer 17

T

Question 18

Actions of the latissimus dorsi

Answer 18

Extends, adducts and medially rotates humerus;

Raises body to arms when climbing

Question 19

Levator scapulae acts synergistically with which part of the trapezius?

Answer 19

Descending part

Question 20

Actions of the levator scapulae

Answer 20

Elevates scapula, downward rotates scapula

Question 21

Actions of rhomboids

Answer 21

Retract and downward rotate scapula, fix scapula to thoracic wall

Question 22

Origin of the deltoid

Answer 22

Lateral third of clavicle, acromion, spine of scapula

Question 23

Insertion of deltoid

Answer 23

Deltoid tuberosity

Question 24

Actions of deltoid

Answer 24

Clavicular (anterior) part: Flex and medially rotates arm;
Acromial (middle) part: Abducts arm
Spinal (posterior) part: Extends and laterally rotates arm

Question 25

When does the deltoid become fully effective as an abductor of the arm?

Answer 25

After the first 15 degrees of abduction

Question 26

Which muscle assists the deltoid in the first 15 degrees of abducting the arm?

Answer 26

Supraspinatus

Question 27

Which parts of the deltoid are used in swinging the limbs during walking?

Answer 27

Anterior (clavicular) and posterior (spinal) parts

Question 28

All except which of the rotator cuff muscles are rotators of the humerus?

Answer 28

Supraspinatus

Question 29

Action of supraspinatus

Answer 29

Assists deltoid in first 15 degrees of abduction

Question 30

Primary medial rotator of the arm

Answer 30

Subscapularis

Question 31

Actions of subscapularis

Answer 31

Medially rotates and adducts arm

Question 32

Actions of teres minor

Answer 32

Laterally rotates and adducts arm