Lecture 5 - Brachium and elbow Flashcards Preview

Anatomy > Lecture 5 - Brachium and elbow > Flashcards

Flashcards in Lecture 5 - Brachium and elbow Deck (61):
1

What joints make up the "elbow joint"?

Humero-ulnar and Radio-humeral joints

2

What bones make up the brachium?

humerus

3

What are the main joints in the brachium?

Glenohumeral and elbow

4

What are the three "spacial" compartments?

Lateral, caudal, and medial

5

What are the two action based compartments?

Flexor and extensor

6

What artery supplies the lateral compartment?

Suprascapular a.

7

What nerve supplies the lateral compartment?

Suprascapular a.

8

What artery supplies the medial compartment?

Subscapular a.

9

What nerve supplies the medial compartment?

Subscapular n.

10

What artery supplies the caudal compartment?

Caudal circumflex humeral a.

11

What nerve supplies the caudal compartment?

Axillary n. and Subscapular n.

12

What action is caused by the lateral compartment?

extension and stabilizing at GH

13

What action is caused by the medial compartment?

Adduction and extension at GH joint

14

What action is caused by the caudal compartment?

Flexion and lateral rotation at GH joint

15

What nerve supplies the flexor compartment?

Musculocutaneous n.

16

What artery supplies the flexor compartment?

Brachial a.

17

What nerve supplies the extensor compartment?

Radial n.

18

What artery supplies the extensor compartment?

Deep brachial a.

19

What action is caused by the flexor compartment?

Flexion (arm and forearm)
Supination (forearm)

20

What action is caused by the extensor compartment?

Extension (arm and forearm)

21

What is the primary job of the lateral, caudal and medial muscles?

move the GH joint

22

What is the primary job of the flexor and extensor muscles?

move the elbow joint

23

What is different about a horses forearm?

ulna and radius is fused

24

What are three structural landmarks that are different on the horse?

Interosseous space, distal end of ulna incorporated w/i radius, and radial tuberosity

25

What three "joints" are within the elbow?

Radio-humeral joint
Ulno-humeral joint
Radio-ulnar joint

26

What interacts with both the radius and the ulna?

Condyle of humerus

27

What articulates with just the ulna?

trochlea

28

What articulates with just the radial head?

capitulum

29

What are the collateral ligaments in the elbow?

Lateral collateral, annular ligament of radius, and medial collateral ligament

30

What supports the elbow joint?

muscle, tendon, and collateral ligaments

31

What movements are allowed at the elbow joint?

Flexion and extension along sagittal plane
Pronation and supination of ulna

32

What is the characteristic of the pronation and supination in arboreal primates?

very marked

33

What is the characteristic of the pronation and supination in terrestrial quadrupeds?

very limited

34

What is the origin of the suprascapular n.?

C6-7

35

What muscles do the suprascapular n. innervate?

supraspinatus and intraspinatus

36

What is the origin of the axillary n.?

C8

37

What muscles do the axillary n. innervate?

Teres major, teres minor, deltoideus, distal brachiocephalicus

38

What is the origin of the musculocutaneous n.?

C7-8

39

What muscles do the musculocutaneous n. innervate?

Coracobrachialis, biceps brachii, and brachialis

40

What is different about the musculocutaneous n.?

Has different path in dog, horse, and ungulates. (be sure to do over these)

41

What is the origin of the radial nerve?

C7-T1

42

What are the muscles innervated by the radial nerve?

Triceps brachii, anconeus, tensor fasciae antebrachii

43

What are the branches of the axillary a.?

Lateral thoracic a., Subscapular a., and caudal/cranial circumflex

44

What are the branches of the brachial a.?

Deep brachial a, collateral a., superficial brachial a., transverse cubital a., and common interosseous a.

45

What is different about the horses axillary a.?

has a suprascapular and throacodorsal branch

46

What is different about the horses brachial a.?

has a collateral ulnar and radial a.

47

What is the main vein that leaves the leg?

cephalic v.

48

What does the cephalic v. meet up with and through what?

External jugular v. via omobrachial v.

49

What muscles are in the lateral group?

Supraspinatus and infraspinatus

50

What muscles are in the caudal group?

Deltoideus, teres major, and teres minor

51

What are the parts of the deltoideus?

Scapular and acromial part

52

What muscles are part of the medial group?

subscapularis and coracobrachialis

53

What muscles are in the extensor group?

triceps brachii, tensor fasciae antebrachii, and anconeus

54

What are the heads of the triceps brachii?

lateral, medial, accessory, and long heads

55

What muscles are in the flexor group?

Biceps brachii and brachialis

56

Where does the proximal tendon of biceps brachii go along?

in the intertubercular sulcus

57

What holds the proximal tendon of the biceps brachii in place?

Transverse humeral retinaculum

58

What is different about the horse's bicep brachii?

Have fibrous band that joins the tendons of origin and insertion - internal tendon

59

What comes off the internal tendon?

Lacertus fibrosus

60

What is the characteristic of the lacertus fibrosus in standing and flexed animals?

Standing - taut
Flexed joint - slackened

61

What occurs when the lacertus fibrosus and the internal tendon work together?

maintain carpal joint in extension