Pectoral girdle

Question 1

Where is the clavicle concave and convex?

Answer 1

Concave lateral 1/3 and convex medial 2/3

Question 2

Where is the conoid tubercle on the clavicle?

Answer 2

At the lateral end

Question 3

How is the pectoral girdle stabilised?

Answer 3

STabRL = Serratus anterior, Trapezius, Rhomboids, Levator scapulae

Question 4

What is the origin of upper fibres of trapezius?

Answer 4

External occipital protuberence, superior nuchal, ligamentum nuchae and spinous process of C7

Question 5

Insertion of the upper fibres of trapezius?

Answer 5

Lateral 1/3 of clavicle and acromion

Question 6

Action of upper fibres of trapezius?

Answer 6

Elevate scapula

Question 7

Middle fibres of trapezius, origin?

Answer 7

Spinous processes T1-T5

Question 8

Insertion of middle fibres of trapezius

Answer 8

Superior spine of scapula, (lateral 2/3)

Question 9

Action of middle fibres of trapezius?

Answer 9

Retract scapula

Question 10

Origin of the lower fibres of trapezius?

Answer 10

T6-T12

Question 11

Insertion of the lower fibres of trapezius

Answer 11

medial 1/3 of spine of scapula

Question 12

Action of lower fibres of trapezius?

Answer 12

Depress scapula

Question 13

Origin of latissimus dorsi?

Answer 13

Spinous process of T7-L5, and sacrum, iliac crest and ribs 10, 11 & 12!

Question 14

Insertion or latissimus dorsi?

Answer 14

Floor of intertubercular sulcus

Question 15

What is the action of latissimus dorsi?

Answer 15

Extend, adduct and medially rotate the humerus

Question 16

Origin of levator scapulae?

Answer 16

Transverse processes of C1-C5

Question 17

Insertion of levator scapulae?

Answer 17

Upper portion of the medial border of the scapula

Question 18

Origin of rhomboid minor?

Answer 18

Lower portion of the nuchal ligament, spinous C7-T1

Question 19

Insertion of rhomboid minor?

Answer 19

Medial border of posterior surface of scapula at root of spine

Question 20

Action of the rhomboid muscles?

Answer 20

Retract and elevate the scapula

Question 21

Insertion of rhomboid major?

Answer 21

Medial border of posterior scapula, root of scapula spine to inferior angle

Question 22

Origin of rhomboid major?

Answer 22

Spinous processes of T2-T5

Question 23

origin of serratus anterios?

Answer 23

Ribs 1-8

Question 24

Insertion of serattus anterior?

Answer 24

medial border of scapula

Question 25

Action of serratus anterior?

Answer 25

protracts and rotates scapula laterally

Question 26

Clinical importance?

Answer 26

Winged scapula if nerve to this muscle is damaged

Question 27

origin of pectoralis major? sternal

Answer 27

First 7 costal cartilages

Question 28

Origin of pectoralis major? Calvicular

Answer 28

Anterior surface of the medial half of clavicle

Question 29

insertion of pectoralis major?

Answer 29

Lateral lip of intertubercular sulcus of humerus

Question 30

Action of pectoralis major?

Answer 30

Flexion adduction and medial rotation of the arm

Question 31

Pectoralis minor origin?

Answer 31

anterior surface of ribs 3-5 and deep fascia

Question 32

Pectoralis minor insertion?

Answer 32

Coracoid process of scapula

Question 33

Action of Pectoralis minor?

Answer 33

pulls tip of the shoulder down and protracts

Question 34

Origin of subclavius?

Answer 34

First rib

Question 35

Insertion of subclavious?

Answer 35

Groove on surface of middle 1/3 of clavicle