Week 8 Flashcards Preview

Anatomy 2 > Week 8 > Flashcards

Flashcards in Week 8 Deck (110)
Loading flashcards...
1

The elbow joint is a complex joint that involves three articulations collectively known as the ___

The elbow joint is a complex joint that involves three articulations collectively known as the *cubital articulation*

2

What are the 3 joints that form the cubital articulation?

Humeroulnar, humeroradial and proximal radioulnar

3

What type of joint is the humeroulnar and humeroradial joint?

Hinge joints

4

What type of joint is the proximal radioulnar joint?

Pivot joint.

5

What movement do hinge joints allow?

Flexion and extension

6

What movement do pivot joints allow?

Pronation and supination

7

The humeroradial articulation is between the ___ and the ___

The humeroradial articulation is between the *capitulum and the head of the radius*

8

The humeroulnar articulation is between the ___ and the ___

The humeroulnar articulation is between the *trochlear of the humerus and the trochlear notch of the ulna*

9

The proximal radioulnar articulation is between the ___ and the ___

The proximal radioulnar articulation is between the *head of the radius and the radial notch of the ulnar*

10

ABD and ADD of the elbow joint is limited by the __

ABD and ADD of the elbow joint is limited by the *medial and lateral lip of the trochlear*

11

What are the ligament of the elbow?

- Radial/ lateral collateral ligament
- Ulnar/medial collateral ligament
- Annular ligament

12

What does the annular ligament do?

Binds the head of the radius to the ulnar

13

___ ligament is divided into 3 parts, anterior, posterior, and
intermediate

*Ulnar* ligament is divided into 3 parts, anterior, posterior, and
intermediate

14

The bands of the ulnar ligament extends from the __ to the ___ and ___

The bands of the ulnar ligament extends from the *medial epicondyle to the coronoid and olecranon processes of the ulnar*

15

Which band of the ulnar ligament is the strongest and which is the weakest?

The anterior band is the strongest, posterior is the weakest

16

What does the oblique/intermediate band of the ulnar collateral ligament do?

Deepens the socket for the trochlea of the humerus

17

___ ligament goes from the coronoid process of the ulnar to the olecranon of the ulnar, hence it doesn't articulate with any other bone

*Oblique/ intermediate band of the ulnar collateral* ligament goes from the coronoid process of the ulnar to the olecranon of the ulnar, hence it doesn't articulate with any other bone

18

The oblique/ intermediate band of the ulnar ligament is also known as the ___

The oblique/ intermediate band of the ulnar ligament is also known as the *Cooper’s Ligament*

19

The radial ligament extends from the ___ to the ___

The radial ligament extends from the *lateral epicondyle to the annular ligament*

20

What is the annular ligament?

A thickening of the capsule of the proximal radioulnar joint which encircles and holds the head of the radius in the
radial notch of the ulna.

21

What movement does the annular ligament allow?

Allows for pronation and supination without dislocation.

22

The internal surface of the annular ligament has ___

The internal surface of the annular ligament has *articular cartilage lining it*

23

The ___ ligament goes from the lateral epicondyle to the ulna

The *lateral ulnar* ligament goes from the lateral epicondyle to the ulna

24

What is the deepest muscle that covers the lateral collateral ligament and the annular ligament?

Supinator muscle

25

What are the superficial muscle sthat covers the lateral collateral ligament and the annular ligament?

- Extensor carpi radialis longus
- Extensor carpi radialis brevis
- Extensor digitorum communis
- Extensor digiti minimi
- Extensor carpi ulnaris
- Anconeus

26

What makes up the cubital tunnel?

The ulnar collateral ligament and the flexor carpi ulnaris

27

What passes through the cubital tunnel?

The ulnar nerve

28

How can the head of the radius be disrupted?

If you pull on the arm of young kids too hard or often

29

What is the nurse maid's elbow?

The subluxation of the radial head from the annular ligament that occurs as a result of the constant pulling of the arm

30

Where is the Subcutaneous olecranon bursa?

Between the skin and olecranon

31

Where is the Subtendinous olecranon bursa?

Between the triceps tendon and olecranon

32

Where is the Intratendinous olecranon bursa?

Sometimes present in the tendon of the triceps brachii

33

Where is the Radioulnar bursa?

Between extensor digitorum, radiohumeral joint and the
supinator muscle

34

Where is the Bicipitoradial bursa?

Lies between the biceps tendon and the anterior part
of the radial tuberosity

35

What is the blood supply of the elbow joint?

Anastomosis around the joint

36

What is the nerve supply of the elbow joint?

Musculocutaneous, radial, and ulnar nerves

37

Full flexion of the elbow is limited by ___

Full flexion of the elbow is limited by *muscle bulk on the anterior arm and the coronoid process*

38

What is the normal carrying angle in males?

5-10 deg

39

What is the normal carrying angle in females?

10- 15 deg

40

What is excessive cubitus valgus?

The forearm is angled too far away from the body. Anything above 15 deg

41

What is cubitus varus?

The forearm is angled too close to the body. Anything below 5 deg

42

____ is often referred to as the gunstock deformity

*Cubitus varus* is often referred to as the gunstock deformity

43

___ can be referred to as the middle radioulnar joint

*The interosseus membrane between the radius and ulnar* can be referred to as the middle radioulnar joint

44

The proximal, distal and middle radioulnar joints all work together to provide ____

The proximal, distal and middle radioulnar joints all work together to provide *stability, mobility, and loa transfer*

45

The proximal radioulnar joint is between the __

The proximal radioulnar joint is between the *head of the radius articulates with the radial notch of the ulna.*

46

The radius is held in place by the strong ___

The radius is held in place by the strong *annular ligament*

47

The annular ligament is lined with a ___

The annular ligament is lined with a *synovial membrane*

48

What is the function of the lining of the annular ligament?

Decrease friction buildup and prevent disruption of the capsule.

49

What movements occur at the proximal radioulnar joint?

The head of the radius rotates within the annular ring
created by the ligament

50

What does the movement of the proximal radioulnar joint allow?

The rotation allows for supination and pronation of
the hand.

51

What is the blood supply of the proximal radioulnar joint?

Anterior and posterior
interosseous arteries

52

What is the innervation of the proximal radioulnar joint?

Musculocutaneous, median, and radial nerves.

53

What does the oblique cord of the interosseus membrane do?

Help to provide some sling stability. Provides support to stop the head of the radius from moving below the ulnar when carrying something heavy

54

What kind of joint is the distal radioulnar joint?

Pivot joint

55

In the distal radioulnar joint, the ___ moves around the
relatively fixed distal end of the ___.

In the distal radioulnar joint, the *radius* moves around the
relatively fixed distal end of the *ulna.*

56

There is a fibrocartilaginous ___, which binds the radius to the ulna and is sometimes referred to as the "___" (TFCC) in the distal radioulnar joint

There is a fibrocartilaginous *articular disc*, which binds the radius to the ulna and is
sometimes referred to as the *"Triangular Fibrocartilage Complex"* (TFCC) in the distal radioulnar joint

57

What is the blood supply of the distal radioulnar joint?

Anterior and posterior interosseous arteries

58

What is the nerve supply of the distal radioulnar joint?

Anterior and posterior interosseous nerves

59

The anterior interosseus nerve that innervates the distal radioulnar joint is from the ___, while the posterior interosseus nerve is from the ___

The anterior interosseus nerve that innervates the distal radioulnar joint is from the *ulnar nerve*, while the posterior interosseus nerve is from the *radial nerve*

60

The TFCC consist of ___

The TFCC consist of *superficial and deeper fibers called the radioulnar fibers(come from the radius and attach to the ulnar)*

61

On what side are the radioulnar fibers?

On the dorsal side

62

The discarpal ligaments goes from the __

The discarpal ligaments goes from the *disc of the TFCC to the lunate and triquetrum*

63

What is the articular disc of the TFCC responsible for?

Transferring load from the medial car... to the pole of the distal ulnar

64

The vascularized and peripheral raduioulnar ligament are nourished by the ___

The vascularized and peripheral raduioulnar ligament are nourished by the *dorsal and palmar branches of the posterior interosseus artery*

65

The vascularized and peripheral raduioulnar ligament are responsible for ___

The vascularized and peripheral raduioulnar ligament are responsible for *guarding the radiocarpal unit around the sit of the ulnar*

66

Extensor carpi ulnaris provides ___

Extensor carpi ulnaris provides *some support more laterally for the radiocarpal joint*

67

The TFCC separates the ___ from the ___

The TFCC separates the *head of the ulna from the radiocarpal joint*

68

What type of joint is the radiocarpal joint?

Condyloid synovial joint

69

The radiocarpal jointallows what type of movement and in what plane?

- Flexion and extension, sagittal plane
- ADD and ABD (radial and ulnar deviation) frontal plane

70

___ surrounds the radiocarpal joint

*A fibrous capsule* surrounds the radiocarpal joint

71

Where does the radiocarpal joint attach?

The distal end of the radius and ulna and the proximal row of carpel bones.

72

The radiocarpal joint is lined with ___

The radiocarpal joint is lined with *a synovial membrane*

73

The palmar radiocarpal ligament extends from the __ to the ___

The palmar radiocarpal ligament extends *from the radius to the two rows of carpal bones*

74

What is the function of the palmar radiocarpal ligament?

Support the radiocarpal joint and direct the hand to follow the radius during supination of the forearm.

75

Where is the dorsal radiocarpal ligament found?

On the dorsal surface

76

What is the function of the dorsal radiocarpal ligament?

Support the radiocarpal joint and direct the hand to follow the radius during supination of the forearm.

77

Where is the ulnar collateral ligament attached?

The ulnar styloid process

78

Where does the ulnar collateral ligament extend to?

The Triquetrum

79

What does the ulnar collateral ligament do?

Strengthens the medial aspect of the capsule.

80

Where is the radial collateral ligament attached?

The radial styloid process and the scaphoid strengthening the lateral aspect of the joint capsule.

81

The articular disc of the distal radioulnar joint (TFCC) intervenes between the __ and ___

The articular disc of the distal radioulnar joint (TFCC)
intervenes between the *head of the ulna and the carpals. *

82

What is the blood supply of the radiocarpal joint?

Dorsal and palmar arches

83

What is the nerve supply of the radiocarpal joint?

Anterior interosseous nerve, posterior interosseous nerve, and the ulnar nerve

84

What makes up the radiocarpal joint?

Radius, scaphoid, lunate, triquetrum and the articular disc

85

What separates the ulnar from the radiocarpal joint?

The articular disc (TFCC)

86

What happens if there's an injury to the articular disc (TFCC) in the wrist?

The fluid from one joint can move to the other

87

What is the degree of the ulnar tilt/ ulnar deviation?

25 deg

88

We have more ___ deviation than we have __ deviation

We have more *ulnar* deviation than we have *radial* deviation

89

We have more ___ of the wrist than we have __

We have more *flexion* of the wrist than we have *extension*

90

The kinematics of the radiocarpal joint in the sagittal plane motion is best appreciated by seeing the wrist as an articulated ___

The kinematics of the radiocarpal joint in the sagittal plane motion is best appreciated by seeing the wrist as an articulated *central column*

91

What bone are involved in the kinematics of the sagittal plane motion of the radiocarpal joint?

Scaphoid, lunate, capitate and 3rd metacarpal

92

The kinematics of the sagittal plane motion is formed by linkages between what?

- Distal radius
- Lunate
- Capitate
- 3rd metacarpal

93

The kinematics of frontal plane motion of the radiocarpal joint occurs through ___

The kinematics of frontal plane motion of the radiocarpal joint occurs through * synchronous
convex-on-concave rotations at both radiocarpal and midcarpal joints*

94

There is movement of what bones during ulnar deviation?

Triquetrum, lunate and scaphoid and some movement between the capitate, lunate and scaphoid

95

What is the main function of the TFCC?

To separate joint cavities of the radiocarpal and distal
radioulnar joints

96

What kind of bone is the pisiform?

Sesamoid

97

How many degrees of freedom does a condyloid joint allow?

2 deg

98

What types of joints are CMC 2-5 and what are they made for?

Plane joints that are made for stability and have minimal motion

99

What types of joints are CMC 1 and what are they made for?

Saddle joint

100

What type of joints are the metacarpal phalangeal joints 2-5?

Condyloid

101

What movements are available at the metacarpal phalangeal joints 2-5?

Flexion and extension
ABD and ADD

102

What type of joints is the metacarpal phalangeal joint 1?

Hinge

103

What movements are available at the metacarpal phalangeal joints 1?

Flexion and extension

104

What type of joints are the IP joints and what do they do?

- Hinge
- Flexion/ extension

105

The head of the radius articulates with the radial fossa in ____

The head of the radius articulates with the radial fossa in *full elbow flexion*

106

Which carpal bone has proximal and distal poles?

The scaphoid

107

What is the direction of movement of the carpals during radial deviation?

Carpals roll laterally and slide medially

108

What is the direction of movement of the carpals during ulnar deviation?

Carpals roll medially and slide laterally

109

What is the most fractured carpal bone?

Scaphoid

110

Which carpal bone is the most subject to avascular necrosis?

Scaphoid