Elbow

Question 1

Describe the annular ligament

Answer 1

• osseosfibrous ring in which the head of the radius spins- connects the radial head to the ulna- superficial fibers blend with the radial collateral ligament

Question 2

Which ligament acts as a brake for radial ulnar rotation

Answer 2

quadrate ligament

Question 3

Describe the action of the radial head during elbow extension

Answer 3

• posterior glide of the radial head on the capitulum

- radial head compression due to varying angle, forced distally

Question 4

What tightness during supination

Answer 4

Tightening of the interosseous membrane

Question 5

How many parts are there to the ulnar collateral ligament

Answer 5

three

• anterior fibers
• oblique fibers
• posterior fibers

Question 6

What is the normal carrying angle of the elbow

Answer 6

7-12 degrees

the medial aspect off the trochlear groove projects more distally

Question 7

How doe the trochlear groove impact movement?

Answer 7

it runs obliquely and laterally, creating a spiral effect. Functionally, they causes a rotation moment of the ulna causing slight supination with elbow flexion

Question 8

What is normal elbow flexion/extension ROM

Answer 8

145 active, 160 passive

0 degrees, 5-10 hyper ext possible

Question 9

What is the open pack position for the ulnohumeral joint

Answer 9

open - 70 flex/slight sup

controversial

Question 10

What is the open pack position for the radiohumeral

Answer 10

25 flexion, forearm neutral

Question 11

What is the open back position for the radioulnar

Answer 11

70 flexion 35 sup

Question 12

What motions might be coupled with elbow extension

Answer 12

Abduction, pronation and caudal glides

distraction in ext, helps extension

Question 13

What motions might be coupled with elbow flexion

Answer 13

adduction, supination and cranial glide

Question 14

What limits varus stress at the elbow

Answer 14

articulations in flexion and extension

Question 15

What limits values stress at the elbow

Answer 15

UCL and capsule

Question 16

Describe the arc of motion of the radius during pronation

Answer 16

• the head rotates in the annular ring. this is an arc, not spin due to the elliptical shape of the radial head.
• Greatest diameter is AP
• distal radius describes the art of motion

Question 17

Describe the arc of motion of the ulnar during pronation supination.

Answer 17

in pronation the ulnar moves posterior and lateral

in supination, the ulna moves medially and anterior

Question 18

What is nursemaids elbow?

Answer 18

• dislocation of the radial head distally by pulling on the elbow.
• Presents with a slight pronation position.
• Annular ligament may get torn

Question 19

How do you reduce a nursemaids elbow

Answer 19

• supination and flexion (or)

- supine, elbow flexed and push on hand

Question 20

What is the most common cause of an elbow dislocation

Answer 20

fall on extended elbow, posteriorly but named based on where the radial head goes.

Question 21

Is there a neural concern with a elbow dislocation?

Answer 21

yes, risk for damage to the ulnar and median nerves

Question 22

How do you reduce a elbow dislocation?

Answer 22

with traction, weight in the hand and then splint in 90 degrees of flexion.

Question 23

Where is tennis elbow most common

Answer 23

most common in your 50s and is self limiting in 8-12 months.