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22 Cards in this Set

  • Front
  • Back
What is the joint of the elbow?
Humeroulnar
What bony portions of the ulna in involved in humeroulnar joint?
olecranon-more proximal and posterior portion fits into the olecranon fossa of humerus

coronoid process-distal to the olecranon forms distal border of the trochlear notch of the ulna

Trochlea of the humerus-articulates on the trochlear notch of the ulna
What type of joint is the humeroulnar joint? (structure and movement)
synovial uniaxial
What type of joint is the Proximal radioulnar joint?
synovial uniaxial
What type of joint is the humoradial joint?
synovial
What movements occur within the proximal radioulnar joint?
Pronation and supination
What are the bony articulations of the proximal RU joint?
Head of radius and radial notch of ulna
What are the bony articulations of the humeroradial joint?
concavity of the radial head and the Capitulum of the humerus
What does the annular ligament surround?
The radial head, it hold the radial head to the ulna
What does the radial collateral ligament attach?
Epicondyle of the humerus to the anular ligament of the radius
What movements does the radial collateral ligament prevent?
Adduction and hyperextension (along with the ulnar collateral)
Describe the ulnar collateral ligament?
It attaches in a triangular fashion the medial epicondyle, the olecranon, and the coronoid process.
What portions of the elbow capsule are particularly weak?
Anterior and posterior portions
What is often fractured in a dislocated elbow?
Coronoid
What type of joint is the middle radioulnar joint?
syndemosis
What forms the middle radioulnar joint?
Interosseous membrane
In what direction do the fibers of the interosseous membrane run?
obliquely upward from ulna to radius
What bone bears most of the weight at the wrist (radius or ulna)?
Radius
Which bone (radius or ulna) bears most of the weight of a fall in the elbow?
Ulna
What bony articulations are involved in the distal radioulnar joint?
Distal end of the ulna and the ulnar notch of the radius
What type of joint is the distal RU joint?
Synovial
Going fron proximal to distal how does the type of joint change in the radioulnar joints?
Proximal radioulnar is synovial
Middle is syndesmosis
Distal is synovial