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PHYT 5115 - Intro to MSK > 10 - Intro to the Elbow > Flashcards

10 - Intro to the Elbow Flashcards

1
Q

What joints make up the elbow?

A

Humeroulnar
Radiohumeral
Proximal radioulnar

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2
Q

How much percentage of loss of flexion would limit our hand to mouth function?

A

20-30 degrees

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3
Q

What type of tilt does the distal humerus have and why?

A

A more valgus tilt as the medial aspect is more distal

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4
Q

What processes contribute to the articular stability of the elbow?

A

The coranoid and olecranon processes

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5
Q

What type of joint is the humeroulnar joint?

A

Synovial, compound and modified sellar joint (one degree of freedom)

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6
Q

What is the humeroulnar joints closed packed position?

A

full extension and supination

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7
Q

What is the humeroulnar joints open packed position?

A

70 degrees of flexion and 10 degrees of supination

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8
Q

True or false, you will lose flexion before extension at the humeroulnar joint

A

True

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9
Q

Flexion of the elbow come with conjunct _______

A

Adduction

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10
Q

Extension of the elbow comes with conjunct _____

A

Abduction

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11
Q

What causes the conjunct movements at the elbow?

A

Shape of trochlear groove

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12
Q

In flexion of the elbow what way does the ulna slide and roll/

A

Anteriorly

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13
Q

In elbow extension what way does the ulna slide and roll?

A

Posteriorly

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14
Q

What type of joint is the radiohumeral joint?

A

Synovial
Compound
Unmodified ovoid (3 degrees of freedom but really only acts in one)

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15
Q

What is the closed packed position of the radiohumeral joint?

A

90 degrees of flecion and 5 degrees of supination

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16
Q

What is the loose packed position of the radiohumeral joint?

A

full extension and supination

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17
Q

True or false: with the radiohumeral joint you would lose extension before flexion

A

False, you would lose flexion before extension

18
Q

What direction does the radius slide and roll move in flexion of the elbow

A

Anteriorly

19
Q

True or false: in elbow extension the radius slides proximally and rolls

A

True

20
Q

What type of joint is the proximal radioulnar?

A

Synovial
Compound
Modified sellar joint (one degree of freedom)

21
Q

What is the closed packed position of the proximal radioulnar joint?

A

full pronation or full supination

22
Q

What is the loose packed position of the proximal radioulnar joint?

A

35 degrees of supination and 70 degrees of flexion

23
Q

True or false: you will lose supination and pronation equally at the proximal radioulnar joint?

A

True

24
Q

What secures the head of the radius to the radial notch on the ulna?

A

The annular ligament

25
Q

When the forearm pronates what are the arthrokinematics of the proximal radioulnar joint?

A

Posterior slide and roll

26
Q

When the forearm supinates what are the arthrokinematics of the proximal radioulnar joint?

A

Anterior slide and roll

27
Q

When you pronate what way does spin occur at the radiohumeral joint?

A

Medially (internally)

28
Q

When you supinate what way does the spin occur at the radiohumeral joint?

A

Laterally (externally)

29
Q

What muscles are in the flexor pronator group?

A 
Pronator teres
Flexor Carpi radialis
Palmaris longus
Flexor carpi ulnaris
Flexor digitorum superficialis
Flexor digitorum profundus
Pronator quadratus?
30
Q

What muscles are in the extensor supinator group?

A 
Brachioradialis (functionally a flexor)
Extensor carpi radialis longus
Extensor carpi radialis brevis
Extensor digitorum
Extensor digiti minimi
Extensor carpi ulnaris
Anconeus
Supinator
31
Q

What is an age related condition that can occur in children up to the age of 10 that affects the elbow

A

Panner’s Disease
Affects the male surface (capitulum)
Decrease blood supply causes cartilage and subchondral bone death

32
Q

What elbow condition is common in people aged 15-20 years old?

A

Osteochondritis Dissecans (OCD)

33
Q

What is the common name for lateral epicondylitis and what age population is it commonly found in?

A

Tennis Elbow, 35+ years old

34
Q

What is the common name for medial epicondylitis?

A

Golfers elbow

35
Q

What is the carrying angle?

A

The angle formed between the long axis of the humerus and long axis of the ulna

36
Q

Who has a greater carrying angle males or females?

A

Females

37
Q

True or false: males typically have a carrying angle of greater than 10 degrees

A

False, anything greater than 10 degrees in males is possibly an issue

38
Q

At what point do you have the greatest valgus position of the elbow?

A

Full extension

39
Q

At what point do you have the least valgus position of the elbow?

A

Full flexion

40
Q

True or false: in full extension the medial and lateral epicondyles make a straight line with the olecranon?

A

True

PHYT 5115 - Intro to MSK (11 decks)

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