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Anatomy > the shoulder and arm > Flashcards

Flashcards in the shoulder and arm Deck (47):
1

what is the origin and insertion of the trapezius muscle?

o - occipital bone and spinous processes of vertebra C1-T12
I- acromium process and spine of scapula

2

what is the function of the trapezius muscle?

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

3

what is the origin and insertion of the latissimus dorsi?

o - vertebrae T7 - L5
I- humerus

4

what is the function of latissimus dorsi?

adducts, extends and laterally rotates arm.

5

what is the origin and insertion of the levator scapulae?

o - C1-C4 vertebrae
I - medial border of scapula

6

what is the function of the levator scapulae?

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

7

what is the origin and insertion of the rhomboid major?

origin - c7 - t1
I - medial border of the scapula

8

what is thee function of the rhomboid minor?

retracts and rotates scapula, fixes scapula to thoracic wall.

9

what is the origin and insertion of the supraspinatus?

o - supraspinous fossa of scapula
I - greater tubercle of humerous.

10

what is the function of the supraspinatous?

abduction of arm.

11

what is the origin and insertion of infraspinatous?

origin - infraspinous fossa of scapula
insertion - greater tubercle of humerous

12

what is the function of the infraspinatous?

lateral rotation of arm and stabalisation of humerous

13

what is the origin and insertion of teres major?

o - inferior angle of scapula
i - humerous

14

what is the function of teres major

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

15

what is the origin and insertion of teres minor?

o- lateral border of scapula
i - humerous

16

what is the function of teres minor?

lateral rotation of the arm

17

what is the origin and insertion of pectoralis major?

clavicular and sternocostal head
i- humerus

18

what is the function of pectoralis major?

adduction and medial rotation of humerus

19

what is the origin and insertion of pectoralis minor?

o - third to fifth ribs
i - caracoid process of scapula

20

what is the function of pectoralis minor?

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

21

what is the origin and insertion of the serratus anterior?

o - outer surface of upper 8 or 9 ribs
i - medial margin of scapula

22

what is the function of serratus anterior?

protects and stabalises the scapula

23

what is the origin and insertion of subscapularis?

o - subscapular fossa
i - lesser tubercle of humerus

24

what is the function of subscapularis?

medial rotation of humerus

25

what is the origin and insertion of the biceps brachii?

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

26

what is the artery and nerve supply to biceps brachii?

brachial artery and musculocutaneous nerve

27

what is the function of biceps brachii?

flexes elbow, flexes and abducts shoulder and supinates

28

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

o - caracoid process
i - medial humerus

29

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

brachial artery and musculocutaneous nerve

30

what is the function of coraco-brachialis?

adduction of humerus, flexion of the arm at glenohumeral joint

31

what is the origin and insertion of the brachialis?

o - anterior surface of humerus
i - glenoid cavity

32

what is the arterial and nerve supply?

radial recurrent artery
musculocutaneus nerve

33

what is the function of the brachialis?

flexion at the elbow joint

34

where does the musculocutaneus nerve arise from?

arises from brachial plexus

35

where does the brachial artery arise from?

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

36

where does the median nerve originate from?

from the brachial plexus

37

what nerve is effected by carpal tunnel syndrome?

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

38

what is the origin and insertion of the deltoid muscle?

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

39

what is the nerve supply to the deltoid muscle?

axillary nerve

40

what is the function of the deltoid muscle?

abduction of shoulder, flexion and extension

41

what is the origin and insertion of the triceps?

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

42

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

deep brachial artery and radial nerve

43

what is the function of the triceps brachii?

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

44

what is the supraglenoid tubercle?

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

45

what is the infraglenoid tubercle?

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

46

where does the radial nerve originate from?

brachial plexus

47

where does the axillary nerve originate from?

brachial plexus