Elbow A

Question 1

What boney structure resists valgus stress at the elbow

Answer 1

radial head

Question 2

the radius head is __________ on a _________ capitulum (humerus)

Answer 2

Concave radius on convex humerus

Question 3

What is the functional ROM for the elbow

Answer 3

30-130

Question 4

What is the capsular pattern of the elbow

Answer 4

Flexion lost before extension

Question 5

What is the open packed position of the humero-ulnar joint

Answer 5

70 flexion, 10 supination

Question 6

What is the close packed position of the humero-ulnar joint

Answer 6

full ext + full supination

Question 7

What is a normal carrying angle?

Answer 7

males: 11-14
Females: 13-16

Question 8

Varus deformities of the elbow indicate what?

Answer 8

potential fracture (gunstock deformity)

Question 9

What is the open packed position of the humero-radial joint

Answer 9

full extension + full supination

Question 10

what is the close packed position of the humero-radial joint

Answer 10

90 degrees flexion + 5 supination

Question 11

What is the open packed position of the proximal radio-ulnar joint

Answer 11

70 flexion and 35 supination

Question 12

What forms 80% of the articular surface of the proximal radio-ulnar joint

Answer 12

annular ligament

Question 13

What is the open packed position of the distal radio-ulnar?

close packed?

Answer 13

open packed: 10 supination

close packed: 5 supination

Question 14

how does the elbow joint capsule respond to injury

Answer 14

does not response well, will form thick scar tissue

these patients need to get moving ASAP

bc everything shares the same joint capsule, when one joint is affected they all are!

Question 15

What is the strongest and stiffest elbow ligament

Answer 15

the anterior band of the UCL

Question 16

When is the anterior band of the UCL taut

When is the LCL taut?

Answer 16

taut throughout motion

taut in full supination

Question 17

The cubital tunnel has _________ volume in extension

_______ in full elbow fleixon

Answer 17

increased volume in extension

decreased volume in flexion

Question 18

The Anterior interosseous nerve comes from what

Answer 18

Median N

Question 19

The posterior interosseus nerve comes from what

Answer 19

Radial N

Question 20

What is considered functional pronation/supination?

Answer 20

50/50

Question 21

flex/ext and pron/sup are _________(relationship)

Answer 21

interdependent, if one is limited, the other will be too

Question 22

T or F: The anterior portion of the UCL resists both valgus and varus stress

Answer 22

T

Question 23

Tricep nerve:

Bicep/Brachialis nerve:

Answer 23

Radial

Musculocutaneous

Question 24

Supinator innervation:

Answer 24

Radial PIN C5-C6

Question 25

Pronator Quadratus Innervation:

Answer 25

Median AIN C8 T1

Question 26

Pronator Teres and Flexor Carpi Radialis Innervation:

Answer 26

Median C6-C7

Question 27

Extensor Carpi Radialis Longus innervation

Answer 27

Radial

Question 28

ECRB innervation innervation

Answer 28

Radial PIN C7-C8

Question 29

Extensor Carpi Ulnaris innervation

Answer 29

Radial PIN C7 C8

Question 30

Abductor and extensor pollicus longus innervation

Answer 30

Radial PIN C7 C8

Question 31

Extensor Digitorum and Extensor Indicis innervation

Answer 31

Radial PIN C7-C8

Question 32

EDM innervation

Answer 32

Radial PIN c7 c8

Question 33

Flexor digitorum superficialis innervation

Answer 33

median C7 C8 T1

Question 34

FDP innervation

Answer 34

Digit 4-5: Ulnar Digit 2-3: Median

Question 35

What are the contents of the cubital fossa?

Answer 35

distal biceps tendon, median n brachial artery radial n., medial cubital cutaneous vein

Question 36

Borders of the cubital fossa:

Answer 36

**Lateral** – brachioradialis, ECRL **Medial** – PT **Proximal** – imaginary line that passes through humeral condyles **Floor** – brachialis

Question 37

Medial elbow tendinopathy can cause neuritis of what nerve? What would be weak?

Answer 37

Median flexors and pronators