the shoulder and arm

Question 1

what is the origin and insertion of the trapezius muscle?

Answer 1

o - occipital bone and spinous processes of vertebra C1-T12

I- acromium process and spine of scapula

Question 2

what is the function of the trapezius muscle?

Answer 2

rotation, retraction, elevation and depression of scapula also extension of the head.

Question 3

what is the origin and insertion of the latissimus dorsi?

Answer 3

o - vertebrae T7 - L5

I- humerus

Question 4

what is the function of latissimus dorsi?

Answer 4

adducts, extends and laterally rotates arm.

Question 5

what is the origin and insertion of the levator scapulae?

Answer 5

o - C1-C4 vertebrae

I - medial border of scapula

Question 6

what is the function of the levator scapulae?

Answer 6

it elevates scapula and tilts scapulas glenoid cavity inferiorly by rotating scapula.

Question 7

what is the origin and insertion of the rhomboid major?

Answer 7

origin - c7 - t1

I - medial border of the scapula

Question 8

what is thee function of the rhomboid minor?

Answer 8

retracts and rotates scapula, fixes scapula to thoracic wall.

Question 9

what is the origin and insertion of the supraspinatus?

Answer 9

o - supraspinous fossa of scapula

I - greater tubercle of humerous.

Question 10

what is the function of the supraspinatous?

Answer 10

abduction of arm.

Question 11

what is the origin and insertion of infraspinatous?

Answer 11

origin - infraspinous fossa of scapula

insertion - greater tubercle of humerous

Question 12

what is the function of the infraspinatous?

Answer 12

lateral rotation of arm and stabalisation of humerous

Question 13

what is the origin and insertion of teres major?

Answer 13

o - inferior angle of scapula

i - humerous

Question 14

what is the function of teres major

Answer 14

adduction of humerus, medial rotation, extention of humerus from flexed position.

Question 15

what is the origin and insertion of teres minor?

Answer 15

o- lateral border of scapula

i - humerous

Question 16

what is the function of teres minor?

Answer 16

lateral rotation of the arm

Question 17

what is the origin and insertion of pectoralis major?

Answer 17

clavicular and sternocostal head

i- humerus

Question 18

what is the function of pectoralis major?

Answer 18

adduction and medial rotation of humerus

Question 19

what is the origin and insertion of pectoralis minor?

Answer 19

o - third to fifth ribs

i - caracoid process of scapula

Question 20

what is the function of pectoralis minor?

Answer 20

it stabalises the scapula by drawing it inferiorly and anteriorly against thoracic wall

Question 21

what is the origin and insertion of the serratus anterior?

Answer 21

o - outer surface of upper 8 or 9 ribs

i - medial margin of scapula

Question 22

what is the function of serratus anterior?

Answer 22

protects and stabalises the scapula

Question 23

what is the origin and insertion of subscapularis?

Answer 23

o - subscapular fossa

i - lesser tubercle of humerus

Question 24

what is the function of subscapularis?

Answer 24

medial rotation of humerus

Question 25

what is the origin and insertion of the biceps brachii?

Answer 25

o- short head- caracoid process long head - supragelnoid tubercle i - radial tuberosity

Question 26

what is the artery and nerve supply to biceps brachii?

Answer 26

brachial artery and musculocutaneous nerve

Question 27

what is the function of biceps brachii?

Answer 27

flexes elbow, flexes and abducts shoulder and supinates

Question 28

what is the origin and insertion of the coraco-brachialis?

Answer 28

o - caracoid process | i - medial humerus

Question 29

what is the arterial and nerve supply to the coraco-brachialis?

Answer 29

brachial artery and musculocutaneous nerve

Question 30

what is the function of coraco-brachialis?

Answer 30

adduction of humerus, flexion of the arm at glenohumeral joint

Question 31

what is the origin and insertion of the brachialis?

Answer 31

o - anterior surface of humerus | i - glenoid cavity

Question 32

what is the arterial and nerve supply?

Answer 32

radial recurrent artery | musculocutaneus nerve

Question 33

what is the function of the brachialis?

Answer 33

flexion at the elbow joint

Question 34

where does the musculocutaneus nerve arise from?

Answer 34

arises from brachial plexus

Question 35

where does the brachial artery arise from?

Answer 35

it is a continuation of the axillary artery beyond the lower margin of teres major

Question 36

where does the median nerve originate from?

Answer 36

from the brachial plexus

Question 37

what nerve is effected by carpal tunnel syndrome?

Answer 37

the median nerve, it is the only nerve to pass through the carpal tunnel, when it is pressed = carpal tunnel syndrome

Question 38

what is the origin and insertion of the deltoid muscle?

Answer 38

o - clavicle, acromium and spine of scapula | i - humerus

Question 39

what is the nerve supply to the deltoid muscle?

Answer 39

axillary nerve

Question 40

what is the function of the deltoid muscle?

Answer 40

abduction of shoulder, flexion and extension

Question 41

what is the origin and insertion of the triceps?

Answer 41

``` o: long head - infraglenoid tubercle of scapula lateral head - above radial sulcus medial head - below radial sulcus i - ulna ```

Question 42

what is the arterial and nerve supply of the triceps brachii?

Answer 42

deep brachial artery and radial nerve

Question 43

what is the function of the triceps brachii?

Answer 43

extension of forarm | long head - extends, adducts arm, extends shoulder

Question 44

what is the supraglenoid tubercle?

Answer 44

small rough projection superior to glenoid cavity near the base of the caracoid process

Question 45

what is the infraglenoid tubercle?

Answer 45

region of scapula, lateral part of scapula inferior to glenoid cavity

Question 46

where does the radial nerve originate from?

Answer 46

brachial plexus

Question 47

where does the axillary nerve originate from?

Answer 47

brachial plexus