Elbow video 1
What does the MCL do and what are the components?
medial collateral ligament (resist valgus forces)
anterior ligament: (strongest) resist valgus 30-90
posterior ligament: resist valgus 60-120
transverse ligament
What are the 2 types of bursae in the elbow?
olecranon: between olecranon and skin
bicipitoradial: between radial tuberosity and biceps tendon
what are the motions of the elbow and what plane do they occur in?
flexion/extension (sagittal)
pronation/supination (transverse)
ulnar adduction and abduction (frontal)
Describe the proximal radioulnar joint?
-DOF, convex/concave rule
1 DOF
convex on concave (opposite of motion)
What decreases the cubital tunnel size?
flexion
What is does the LCL resist and what are the components?
Lateral collateral ligament (resist varus forces)
annular ligament
lateral ulnar collateral ligament
radial collateral ligament
what runs in the cubital tunnel?
the ulnar nerve runs between the MCL and the cubital tunnel retinaculum
What happens with ulnar adduction and abduction? (conjunct functions)
ulnar abduction: elbow extension
ulnar adduction: elbow flexion
What are the motions at the unlohumeral joint?
flexion, extension, ulnar abduction, ulnar adduction
what nerve runs in the cubital fossa, and whats its orientation.
the median nerve runs on the lateral edge of the pronator teres
What is the carrying angle and the normal angles?
a normal angle of the elbow
males: 11-14
female: 13-16
what are the borders of the cubital fossa
lateral: brachioradialis mm.
medial: pronator teres mm.
what happens with pronation and supination (conjunct motion)?
pronation: elbow extension
supination: elbow flexion
what are the motions of the radiohumeral joint?
What muscle drive the conjunct motion of pronation and supination?
biceps brachii
What is the function of the elbow?
position the hand in space
flexion=60-100 degrees
pronation/supination = 100 degrees combined
Where is most of the annular ligament covering?
the radial head
describe the ulnohumeral joint?
-DOF, Convex/concave rule, conjunct motion
1 DOF
concave on convex (same direction)
ulnar adduction and abduction
what are the motions of the radioulnar joint?
supination and pronation
-anterior capsule is taut and resists over extension
-posterior capsule is taut and resists over flexion
When is the LCL most taut?
through flexion and extension with more in supination
Describe the radaiohumeral joint?
-DOF, convex/concave rule, conjunct motions
2 DOF
concave on convex (same as motion)
supination and pronation