1what type of joint is the elbow joint
rotating hinge
2how many bones are in the elbow joint?
primary ligaments?
joints?
joint capsule?
3 bones
3 primary ligaments
3 joints
one joint capsule
3what are the motions present at the elbow
flexion and extension
4what are the motions present in the forearm
supination and pronation (elbows tucked to side)
5do women or men have a higher carrying angle
women
6what is considered a normal carrying angle
5-15 degrees elbow lateral angulation at rest
7what is the purpose of a carrying angle
allows arms to clear hips with gait
8what joints make up the elbow
humeroradial joint
humeroulnar joint
proximal radioulnar joint
9what type of joints are the humeroradial and humeroulnar joints
what type of motions occur at these joints
hinge joints
flexion and extension
10what type of joint is the proximal radioulnar joint
what type of motions occur at this joint
pivot joint
supination and pronation
11what is the joint in the wrist
radioulnar joint
12what motions occur at the distal radioulnar joint
supination and pronation
13Humeroradial has no connection in full extension. It transmits load at about __%
60
14how does the radius move in supination and pronation
- radius rotates on the staible ulna
- radius crosses the ulna in pronation
- radius shorter in pronation due to cross
15how is the elbow stabilized
bone structure
ligamentous stabilization
muscular stabilization
compensatory stabilization
16secondary stabilizers may become primary stabilizers with deficiencies in primary structures
compensatory stabilization
17what is the purpose of the annular ligament
- prevents radial head subluxation
- aids supination/pronation
18what is the purpose of the radial collateral ligament
lateral epicondyle to ulna
prevents posterior and lateral subluxation
19what is the purpose of the ulnar collateral ligament
medial epicondyle to ulna
prcents lateral movement
20what does the make up of the elbow joint capsule look like
fibrous capsule with synovial fluid inside
21what is the purpose of the elbow joint capsule
encloses and lubricates joints of the elbow
22the capsule is lax/loose at 80 degress flexion, what does this cause
elbow flexion contracture risk
23what injury is tested with the varus stress test
radial collateral ligament injury
24what injury is tested witht he valgus stress test
ulnar collateral ligament injury