Shoulder + Elbow + Wrist/hand Flashcards
What creates the carrying angle of the humeroradial joint.
Trochlea project more distal and pushes ulna more lateral and capitulum becomes proximal = valgus
What is the distal radioulnar joint doing in pronation?
radius is spinning on fixed ulna
What are the arthorkinematics for the distal radioulnar joint
Concave on convex
The elbow complex consists on how many joints?
3 proximal joint
1 joint capsule
Why is one joint capsule problematic?
Since they are all connected there is potential for cross contamination of pathology aka bacterial infection
What is the Anterior Medial collateral ligament responsible for
Valgus Stress stailizer
What is the Anterior medial collateral ligament protects
20-120 degs flexion
What is the posterior medial collateral ligament responsible for
less significant than in valgus stability because its smaller and thinner
What is the posterior medial collateral ligament protects
co-primary restraint for valgus at 120’
secondary: 30’ + 90’
- can help identify which structures are injured
What is the oblique/transverse/Cooper’s medial collateral ligament purpose?
holds the anterior and posterior ligament down
maintain joint surface
What is the lateral collateral ligament resists what?
Varus
distraction force of joint surfaces
What is the annular ligament stabilizing?
Head of radius to ulna
What is the shape of the annular ligament?
Circular shape
Why is the annular ligament circular shape and issue?
Because the radial head is ovalish and this can cause some distraction/dislocation
leading nurse made elbow
What is the arthrokinematics for Humeroulnar joint in open chain
Concave on Convex
