Elbow and Arm Review Flashcards
Name the bony landmarks on the elbow and arm
- lateral epicondyle
- medial epicondyle
- capitulum
- trochlea
- head of radius
- conoid process of ulna
- radial tuberosity
- ulnar tuberosity
- olecranon process
Describe the trochlea
- medial side of humerus
- meets up with ulna
Describe the medial epicondyle
- looks like thumb sticking out of bone, very prominent because a lot of finger & wrist flexors originate here
Describe the capitulum
- rounded, almost spherical shape along lateral side of articular surfaces of humerus
- meets up with radius
Describe the head of radius
- relatively flat, slight concavity
- rounded surface if you look from above
- will spin around radial notch on ulna (probation & supination)
Describe the radial tuberosity
- on proximal end of radius
- leans towards medial side
- attachment for biceps brachii
Compare the size of the medial epicondyle and lateral epicondyle
Medial: very prominent
Lateral: very subtle
What is the ulnar tuberosity an attachment for?
Brachialis
Where is the conoid process located?
Ulna @end where it meets up with the trochlea of humerus
Describe the olecranon process
- ulna scoops into back of humerus, males olecranon process
- “funny bone”
- most proximal end of ulna
- hooks into olecranon fossa on humerus
How does the structural integrity of the elbow relate to injury?
- elbow has a lot of bony congruency, very stable joint
- ulna wraps around the trochlea of the humerus
- usually need someone with excessive amount of laxity/looseness through the joint or have huge amount of force coming in (especially fast & in extended elbow like Olympic lift)
Name the joints of the elbow
-superior radio-ulnar joint
- humero-ulnar joint
- humero-radial joint
Describe the superior radio-ulnar joint
- head of radius resting against concave notch on ulna
-allows radius to spin through pronation and supination for rest of forearm
*We need the radius to be held against ulna but not so much that it can’t spin = annular ligament!
Describe the annular ligament
- attached to anterior & posterior margins of the radial notch on the ulna
- loops around radial head but doesn’t actually attach to it
- allows radius to spin against ulna but still be attached
Describe the humero-ulnar joint
- olecranon process on back and conoid on front
- scoop around trochlea