Brainscape's Knowledge GenomeTM

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


See full index

Kinesiology > Elbow Complex > Flashcards

Elbow Complex Flashcards

1
Q

What are the jt of the elbow complex

A

Elbow- humeroulnar and humeroradial

Proximal and distal radioulnar

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

Describe the elbow jt

A

Modified hinge jt between
Trochlear notch of ulna & trochlea of humerus (humeroulnar)
And
Head of radius and capitulum of humerus (humeroradial)

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

What jts are in the elbow jt capsule

A

Humeroulnar, humeroradial, and proximal radioulnar

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

The elbow jt capsule is loose and weak where?

A

Anteriorly and posteriorly

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

The elbow jt capsule is reinforced laterally by the …

A

Collateral ligaments

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

Describe the carrying angle

A

Medial portion of the trochlea projects more distally than the lateral portion resulting in a Valgus angulation of the forearm

8-15 degrees

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

What is the function of the carrying angle

A

Allows a person to carry an object away from side if the thigh

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

The medial (ulnar) collateral ligament ins comprised of

A

Anterior, posterior, and transverse medial collateral ligaments

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

Which collateral ligament stabilizes against valgus torque at the elbow and limits extension at end ROM?

A

Medial (ulnar) collateral ligament

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

The lateral collateral ligament complex is composed of…

A

Lateral (radial) collateral ligament
Lateral ulnar collateral ligament
Annular lig

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

Which collateral ligament stabilizes against Varus torque at the elbow and combined varus and supination torques

A

Lateral collateral ligament complex

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Describe the articulation of the humeroulnar jt

A

Concave surface of trochlear notch on the convex trochlea of the humerus

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

Osteokinematics of the humeroulnar jt

A

Flex/ext

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

Arthrokinematics of the humeroulnar jt during flexion

A

Anterior roll, anterior glide

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

Arthrokinematics of extension at the humeroulnar jt

A

Posterior roll posterior glide

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

Describe the articulation at the humeroradial jt

A

Concave Radial head with the convex capitulum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Osteokinematics of the humeroradial jt

A

Flex/ext

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Arthrokinematics of flexion and extension at the humeroradial jt

A

Flex: anterior roll and anterior glide
Extension: posterior roll, posterior glide

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

What is the closed packed position at the humeroradial jt

A

90 flexion and 5 supination

20
Q

What is the closed packed position of the humeroulnar jt

A

Full ext and sup

21
Q

What is the open packed position of the humeroulnar jt

A

Flexed at 70 and supinated at 10

22
Q

What is the open packed position of the humeroradial jt

A

Full ext and sup

23
Q

Consular pattern for the elbow

A

Flexion > ext

24
Q

Describe the proximal radioulnar jt

A

Ulnar radial notch, head of radius and annular lig

Uniaxial pivot jt

25
Q

Describe the distal radioulnar jt

A

Ulnar notch of the radius with head of the ulna with an articular disc (triangular Fibrocartilage)

Uniaxial pivot jt

26
Q

During pronation the proximal radioulnar jt ________________ and at the distal end the concave ulnar notch of the radius _________ around the ulnar head.

A

Rotation

Slides

27
Q

Describe the Arthrokinematics of supination at the proximal radioulnar jt.

A

Lateral rotation/spin of the head of the radius on the ulnar radial notch within the annular lig

28
Q

Describe the Arthrokinematics of pronation at the proximal radioulnar jt

A

Medial rotation/spin of the head of the radius on the ulnar radial notch within the annular lig

29
Q

Describe the Arthrokinematics of supination at the distal radioulnar jt

A

Lateral roll and glide of the concave ulnar notch of the radius on the convex head of the ulna

30
Q

Describe the Arthrokinematics of pronation

A

Medial roll and glide of the concave ulnar notch of the radius on the concave head of the ulna

31
Q

What is the closed packed position for the proximal radioulnar jt

A

5 deg. Sup

32
Q

What is the open packed position of the proximal radioulnar jt

A

70 deg of flex, 35 deg sup

33
Q

What is the capsular pattern of the radioulnar jts

A

Supination = pronation

34
Q

What is the closed packed position of the distal radioulnar jt

A

5 deg sup

35
Q

What is the open packed position of the distal radioulnar jt

A

10 deg sup

36
Q

Flexor torque is 20-25% greater when the elbow is in what position?

A

Supination

37
Q

How does the supinated position increase flexor torque?

A

It increases the flexor moment arm of the biceps and brachioradialis

38
Q

Why brachialis considered the “workhorse” of the elbow flexors?

A

Large muscle volume

Active involvement in all elbow in all types of elbow flexion (pronated or supinated)

39
Q

Elbow extension is typically combined with ____________ in explosive pushing activities. What is the synergist relationship in this case?

A

Shoulder flexion.

Anterior delt has a synergistic relationship with the triceps in this activity

40
Q

Functionally, pronation is associated with ________ and supination is associated with ________. This combo allows for hand to rotate nearly __________. Why is this important?

A

IR
ER
360 deg

When testing make sure pt is doing pure pron/sup (will try to cheat with ir/er)

41
Q

Which muscle generates force with supination at any angle? (Biceps or supinator)

A

Supinator

42
Q

Which supinator muscle is normally recruited in high power supination, particularly in those involving elbow flexion?

A

Biceps muscle

43
Q

During high power pronation we recruit….

A

Pronation teres

44
Q

During low power, everyday activities we use what pronator?

A

Pronator quadratus

45
Q

What is the pronator synergist relationship we see?

A

Triceps act as synergist to counter the tendency of the pronator teres to flex the elbow

Kinesiology (18 decks)

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