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Laboratory 10. Joints of the Upper Extremity
Step 4. Elbow joint

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The elbow is a complex joint which connects the humerus, radius, and ulna (Figure 10.5A (medial view), Figure 10.5B (lateral view forearm in supination). Its components are:

  • humeroulnar joint - a hinge joint between the humerus and ulna. It allows flexion and extension,
  • humeroradial joint - a pivot joint between the humerus and radius. It allows the radius to move with the humerus in flexion and extension, and additionally allows the radius to pivot on the capitulum of the humerus as it rotates about the ulna.
  • proximal radioulnar joint - a pivot joint which allows the radius to rotate within the capsule which holds it adjacent to the ulna.

Links and References:
Grant's: 6.72-6.75
Netter (1ed.): 412 (2ed.): 408
Rohen/Yokochi: 357