Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Musculoskeletal System > Elbow and joints of forearm > Flashcards

Elbow and joints of forearm Flashcards

1
Q

What type of joint is the elbow?

A

-Hinge-type synovial joint

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

At full extension of the forearm, what is the angle of the humerus with the ulna?

A

-170 degrees

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the carrying angle?

A

-The angle between the forearm and the trunk at rest

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What muscles are responsible for flexion at the elbow?

A
  • Biceps Brachii
  • Brachialis
  • Brachioradialis
  • Palmaris Longus (weak)
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What muscles are responsible for extension of the elbow?

A

-Triceps Brachii

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

-What does the fibrous capsule cover at the elbow?

A
  • The elbow joint

- The proximal radioulnar joint

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Why is the capsule of the elbow weak anteriorly and posteriorly?

A

-To allow movement

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What are the collateral ligaments?

A

-Ligaments on the medial and lateral sides of the capsule (ulnar and radial, respectively) which provide strength

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is beneath the fibrous capsule?

A

-Synovial membrane (secreting lubricating fluid)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Describe the ulnar collateral ligament

A

-Has 3 bands
anterior -> strongest, cord-like band
posterior -> fan-like band
oblique-> deepens the socket for trochlea and provides additional stength

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Describe the radial collateral ligament

A
  • Fan-like
  • Blends with the annular ligament
  • Prevents dislocation
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What are the two most clinically relevant bursae?

A
  • Subcutaneous olecranon bursa

- Subtendinous olecranon bursa

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Where does the radial nerve pass the elbow?

A

-Anterior to lateral epicondyle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Where does the ulnar nerve pass the elbow?

A

-Posterior to medial epicondyle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Describe the blood supply to the elbow

A

-Arterial anastamoses surround the elbow formed by collateral arteries and recurrent branched of the ulnar, radial and interosseous arteries

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What are the three joints in the forearm?

A
  • Proximal radioulnar
  • Interosseous membrane
  • Distal radioulnar
17
Q

What do the joints of the forearm allow?

A

-Pronation and supination

18
Q

What type of joint is the proximal radioulnar joint?

A

-Pivot joint

19
Q

What articulations are involved in the proximal radioulnar joint?

A
  • Radial head

- Radial notch of ulna

20
Q

What is the anatomical location of the annular ligament, including its insertions?

A

-A ligament which arises from the ulna, wraps around the head of the radius and attaches posteriorly to the radial notch of the ulna to form a ligamentous collar

21
Q

What is pulled elbow?

A

-A common sublaxation of radial head from annular ligament

22
Q

Why is pulled elbow common in children?

A

-Annular ligamentt hasnt yet adapted funnel-like arrangement and isnt taut

23
Q

What type of joint is the interosseous membrane?

A

-Fibrous joint

24
Q

In which direction do the fibres of the membrane run? Why is this important?

A
  • Inferio-medially

- Allows distribution of force from radius to ulna as the radius recieves force first as it lays more distal

25
Q

What articulations are involved in the proximal radioulnar joint?

A

-Head of ulna with ulnar notch of radius

26
Q

What is the function of the articular disk of the distal radioulnar joint?

A
  • To maintain structure and joint integrity during pronation and supination
  • Separates cavity of distal radioulnar joint from wrist cavity
27
Q

What are the articulations at the elbow?

A
  • Olecronon fossa with olecranon
  • Trochlea with trochlear notch
  • Coronoid process with coronoid fossa
  • Radial head with capitulum
  • Radial head with radial fossa
28
Q

What is the sacciform recess?

A

-A superior extension of the synovial capsule which allows twisting of the capsule during movement

29
Q

What muscles are responsible for supination?

A
  • Biceps brachii

- Supinator

30
Q

What musclees are responsible for pronation?

A
  • Pronator quadratus

- Pronator teres

31
Q

What articulations occur at the wrist?

A

-Distal radius and articular disk with scaphoid, lunate and triquitrum

32
Q

Name the ligaments of the wrist

A
  • Radial collateral ligament
  • Ulnar collateral ligament
  • Palmar radiocarpal ligaments -> ensures hand follows raduis in supination
  • Dorsal radiocarpal ligaments-> ensures had follows radius during pronation
33
Q

What are the movements of the wrist?

A
  • Flexion/Extension
  • ABduction (Radial deviation)
  • ADduction (ulnar deviation)
34
Q

What is a colles fracture?

A

-Fracture which occurs in distal radius causing posterior displacement of the distal fragment (dinnerfork deformity)

35
Q

What is a possible complication of fracture of scaphoid? Why?

A

-Avascular necrosis as blood supply comes distally

36
Q

Where would you clinically examine for tenderness if a scaphoid fracture was suspected?

A

-Over the anatomical snuff box

Musculoskeletal System (34 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions