Lecture 5

Question 1

What muscles act on shoulder girdle? (5)

Answer 1

trapezius, levator scapulae, rhomboids, serratus anterior, pectoralis minor

Question 2

Supraspinatus: origin

Answer 2

supraspinous fossa

Question 3

Supraspinatus: insertion

Answer 3

greater tubercle of humerus

Question 4

Supraspinatus: action

Answer 4

abduction of arm at shoulder

Question 5

Supraspinatus: innervation

Answer 5

suprascapular nerve

Question 6

Infraspinatus: origin

Answer 6

Infraspinous fossa

Question 7

Infraspinatus: insertion

Answer 7

greater tubercle of humerus

Question 8

Infraspinatus: action

Answer 8

external (lateral) rotation of arm at shoulder

Question 9

Infraspinatus: innervation

Answer 9

suprascapular nerve

Question 10

Teres minor: origin

Answer 10

lateral border of scapula

Question 11

Teres minor: insertion

Answer 11

greater tubercle of humerus

Question 12

Teres minor: action

Answer 12

external (lateral) rotation of arm at shoulder

Question 13

Teres minor: innervation

Answer 13

axillary nerve

Question 14

Subscapularis: origin

Answer 14

subscapular fossa

Question 15

Subscapularis: insertion

Answer 15

lesser tubercle of humerus

Question 16

Subscapularis: actions (2)

Answer 16

medial (internal) rotation of arm at shoulder, adducts arm at shoulder

Question 17

Subscapularis: innervation

Answer 17

subscaplar nerve

Question 18

Deltoid: origins (3)

Answer 18

lateral clavicle, acromion, spine of scapula

Question 19

Deltoid: insertion

Answer 19

deltoid tuberosity of humerus

Question 20

Deltoid: actions (3)

Answer 20

abduction of arm at shoulder, medial and lateral rotation of arm, flexion and extension of arm

Question 21

Deltoid: innervation

Answer 21

axillary nerve

Question 22

Coracobrachialis: origin

Answer 22

coracoid process of scapula

Question 23

Coracobrachialis: insertion

Answer 23

medial shaft of humerus

Question 24

Coracobrachialis: actions (2)

Answer 24

adduction of arm at shoulder, flexion of arm at shoulder

Question 25

Coracobrachialis: innervation

Answer 25

musculocutaneous nerve

Question 26

Which muscles are part of the rotator cuff group? (4)

Answer 26

supraspinatus, infraspinatus, teres minor, subscapularis

Question 27

Which muscles move the arm that are not part of the rotator cuff group? (5)

Answer 27

deltoid, coracobrachialis, pectoralis major, latissimus dorsi, teres major

Question 28

Biceps brachii: origins (long head and short head)

Answer 28

long head: supraglenoid tubercle of scapula short head: coracoid process

Question 29

Biceps brachii: insertion

Answer 29

radial tuberosity

Question 30

Biceps brachii: actions (3)

Answer 30

flexes arm at forearm at elbow, abducts and medially rotates arm, supination (forearm)

Question 31

Biceps brachii: innervation

Answer 31

musculocutaneous nerve

Question 32

Brachialis: origin

Answer 32

anterior humerus

Question 33

Brachialis: insertions (2)

Answer 33

ulnar tuberosity and coranoid process

Question 34

Brachialis: action

Answer 34

flexes forearm at elbow

Question 35

Brachialis: innervation

Answer 35

musculocutaneous and radial nerves

Question 36

Brachioradialis: origin

Answer 36

lateral supracondylar ridge (proximal 2/3)

Question 37

Brachioradialis: insertion

Answer 37

styloid process of radius

Question 38

Brachioradialis: action

Answer 38

flexes forearm at elbow joint

Question 39

Brachioradialis: innervation

Answer 39

radial nerve

Question 40

Triceps brachii: origins (long head, lateral head, medial head)

Answer 40

long head: scapula lateral head: humerus medial head: humerus

Question 41

Triceps brachii: insertion

Answer 41

olecranon of ulna

Question 42

Triceps brachii: actions (2)

Answer 42

extends and adducts arm, extends forearm

Question 43

Triceps brachii: innervation

Answer 43

radial nerve