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MSK - anatomy - ABDN > Upper limb 1 > Flashcards

Flashcards in Upper limb 1 Deck (53):
1

what makes up the anterior wall of the axilla

the pectorals major and minor

2

what makes up the posterior wall of the axilla

the latissimus dorsi

3

what makes up the medial wall of the axilla

the serrated anterior

4

what makes up the lateral wall of the axilla

the head of the humerus

5

when does the subclavian artery become the axillary artery

at the lateral border of the first rib

6

when does the axillary artery become the brachial artery

at the inferior border of the teres major muscle

7

what structures do the axillary lymph nodes drain

the arm and the lateral breast

8

what makes up the brachial plexus

the ventral rami of spinal nerves C5-T1

9

what are the 3 trunks of the brachial plexus

the upper, middle and lower trunk

10

what name is given to damage to the upper trunk

Erb's palsy

11

what are the clinical signs if someone has damaged the upper trunk of the brachial plexus

medially rotated arm and flexed wrist (waiter's tip position)

12

what are the causes of Erb's palsy

damage to the upper trunk of the brachial plexus - can be caused be a fall on the shoulder, hyperextension of the shoulder or shoulder dystocia

13

what name is given to damage to the lower trunk

Klumpke's palsy

14

what are the clinical signs of someone has damaged the lower trunk of their brachial plexus

claw hand - the flexors of the wrist and fingers are affected as well as the intrinsic muscles of the hand

15

what are the cords of the brachial plexus

the lateral, medial and posterior

16

describe the formation of the lateral cord of the brachial plexus

the superior branches of the upper and middle trunk

17

describe the formation of the medial cord of the brachial plexus

the superior branch of the middle trunk

18

describe the formation of the posterior cord of the brachial plexus

the inferior branch of the upper, middle and lower trunks

19

what are the branches of the lateral cord of the brachial plexus

musculocutaneous, lateral aspect o the median nerve and the lateral aspect of the pectoral nerve

20

what are the branches of the medial cord of the brachial plexus

lateral aspect of the median and pectoral nerves and the ulnar nerve

21

what are the branches of the posterior cord of the brachial plexus

axillary, radial, sub scapular and thoracodorsal

22

name the vein that connects the basilic to the cephalic in the arm

median cubital

23

what dermatome covers the thumb

C6

24

what dermatome covers the middle/long finger

C7

25

what dermatome covers the little finger

C8

26

what are the dermatomes of the arm that do not cover any of the fingers

C5 and T1

27

what type of joint is the stenoclavicular joint

synovial saddle

28

where is the clavicle the weakest

1/3rd of the way in from the acromion

29

what does the clavicle articulate with laterally

the acromion

30

what is the most lateral aspect of the scapula

the acromion

31

what type of joint is the acromion-clavicular joint

synovial plane

32

what muscles elevate the scapula

the upper fibres of the trapezius and the elevator scapulae

33

what muscles depress the scapula

the inferior fibres of the trapezius

34

what muscles protract the scapula

the serrated anterior

35

what muscles retract the scapula

middle trapezius and rhomboids

36

what muscles cause upwards rotation of the scapula

the upper and middle fibres of the trapezius

37

what muscles cause downward rotation of the scapula

the rhomboids and elevator scapulae

38

name the 4 rotator cuff muscles

supraspinatous, infraspinatous, teres minor and the subscapularis

39

what is the role of the rotator cuff muscles

to stabilise the shoulder joint

40

what type of joint is the glenohumeral joint

ball and socket

41

what is the role of the glenoid labrum

to stabilise the shoulder joint by increasing the surface area of the glenoid cavity

42

what ligament prevents the head of the humerus dislocating superiorly

the dorado-acromial ligament

43

in which direction is the shoulder joint most likely to dislocate

anteriorly

44

name the bursae that communicates with the glen-humeral joint

the subscapularis

45

what nerve innervates the deltoid

axillary

46

what movements does the deltoid carry out

anterior fibres - medial rotation

middle fibres - abduction

posterior fibres - lateral rotation

47

what are the actions of the pectorals major muscle

medial rotation of the shoulder and adduction of the arm

48

what vein sits between the pectorals major and the deltoid and what is the clinical relevance of this vein

the cephalic vein - this is used for central lines

49

what is the action of the serratous anterior

protraction of the scapula

50

damage to which nerve will result in paralysis of the serrated anterior

long thoracic nerve

51

damage to which nerve causes winged scapula

long thoracic nerve

52

what is the innervation of the trapezius muscle

CN XI

53

what are the actions of the teres major and the teres minor

the teres major medially rotates the arm and the teres minor laterally rotates it