Muscles (shoulder)

Question 1

Where does the pec major muscle insert?

Answer 1

Lateral of the bicipital groove

Question 2

Where does the pec major originate from?

Answer 2

The clavicle
Costal cartilages
Sternum

Question 3

What is the action of the pec major?

Answer 3

Medially rotate the arm and adduction

Question 4

What is the innervation of the pec major?

Answer 4

Medial and lateral pectoral nerve

Question 5

Where does the pec minor originate from?

Answer 5

Ribs 3-5

Question 6

Where does the pec minor insert into?

Answer 6

The coracoid process of the sternum

Question 7

What are the actions of the pec minor?

Answer 7

Pull the scapula forwards and downwards

Pull the scapula against the thoracic wall to stabilise it

Question 8

What is the innervation of the pec minor?

Answer 8

Medial pectoral nerve

Question 9

What is the origin of the serratus anterior?

Answer 9

Strips from ribs 1-8

Question 10

What is the insertion of the serratus anterior?

Answer 10

Medial border of the costal surface of the scapula

Question 11

What is the action of the serratus anterior?

Answer 11

To hold the scapula against the ribs and to rotate the scapula

Question 12

What is the innervation of the serratus anterior?

Answer 12

Long thoratic nerve

Question 13

What happens if the long thoratic nerve is damaged?

Answer 13

Seratus anteior is paralysed and the medial border of the scapula is no longer held against the ribs - winging of he scapula

Question 14

What is the origin of the trapezius?

Answer 14

Skull

Spinous processes of C7-T12

Question 15

What is the insertion of the trapezius?

Answer 15

Spine of scapula
Acromion of scapula
Clavicle

Question 16

What is the action of the trapezius?

Answer 16

Upper fibres - lift and rotate the scapula during abduction

Middle - retract scapula

Lower - pull scapula inferiorly

Question 17

What is the innervation of the trapezius?

Answer 17

C3 and C4

Question 18

What are the superficial back muscles?

Answer 18

Trapezius and Lat dorsi

Question 19

What is the main origin for the lat dorsi?

Answer 19

T6-T12

Question 20

What is the insertion of the lat dorsi?

Answer 20

Converge into tendon into the middle of the bicipital groove

Question 21

What is the action of the lat dorsi?

Answer 21

Medial rotation and adduction of the arm

Question 22

What is the innervation of the lat dorsi?

Answer 22

C6-C8

Question 23

What does the doral scapula nerve innervated?

Answer 23

• Levitator scapulae
• Rhomboid major
• Rhomboid minor

Question 24

What is the insertion of the levator scapulae?

Answer 24

Medial border of scapula (above the spine)

Question 25

What is the action of the lavator scapulae?

Answer 25

Elevate the scapula

Question 26

What is the insertion of the rhomboid minor?

Answer 26

Medial border of the scapula (at the level of the spine)

Question 27

What is the action of the rhomboid minor?

Answer 27

Retract and rotate scapula

Question 28

What is the insertion of the rhomboid major?

Answer 28

Medial border of the scapula (below the spine)

Question 29

What is the action of the rhomboid major?

Answer 29

Retract and rotate scapula

Question 30

Where do the rhomboid major and minor lie in relation to each other?

Answer 30

Rhomboid minor is superior to rhomboid major

Question 31

What does the axillary nerve innervate?

Answer 31

The deltoid and teres minor

Question 32

What does the suprascapular nerve innervate?

Answer 32

Supraspinatous and infraspinatous muscles

Question 33

What innervates the teres major?

Answer 33

Lower subscpular nerve

Question 34

What innervates he subscapularis?

Answer 34

Upper and lower subscapular nerves

Question 35

What is the origin of the deltoid?

Answer 35

Clavicle Spine of scapula Acromion of scapula

Question 36

What is the insertion of the deltoid?

Answer 36

Deltoid tuberocity on the lateral surface of the humerus

Question 37

What is the action of the deltoid?

Answer 37

Anterior - flexion and medial rotation Posterior - extension and lateral rotation Middle - Major abductor of the arm

Question 38

What is the trapezium and the deltoid divided into?

Answer 38

3 areas of muscle fibres, all with different functions

Question 39

What is the insertion of the teres major muscle?

Answer 39

Medial border of the inter-tubercular groove

Question 40

What is the action of the teres major?

Answer 40

Medially rotate and adduct the arm

Question 41

What is the action of the subscapularis?

Answer 41

Medially rotate the arm

Question 42

What is the action of the teres minor and infraspinatous?

Answer 42

Laterally rotate the arm

Question 43

What is the function of the supraspinatous?

Answer 43

Abduct the arm the first 15º

Question 44

Where do the rotator cuff muscles insert? APART FROM WHICH ROTATOR CUFF?????? Where does this insert?

Answer 44

Onto the greater tubercle of the humerus APART FROM: The subscapularis - inserts onto the LESSER tubercle

Question 45

What is the origin of the teres major?

Answer 45

Inferior angle of the scapula (posteriorly)

Question 46

What is the origin of the teres minor?

Answer 46

Posterior surface of the scapula (adjacent to lateral border)