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This notch articulates with the trochlea of the humerus to form the elbow joint.
On the lateral aspect of the calcaneus, 20 mm posterior to the peroneal trochlea , the periosteum covering an 8 x 8 mm area was peeled, and two anchors were inserted into the calcaneus at least 8 mm apart.
This anterior projection helps receive the trochlea of the humerus and lies in the coronoid fossa of the humerus when the elbow is flexed.
If this maneuver causes reproduction of a disabling symptom, the patient may have a medial patellar subluxation, in which the patella is tracking from medial in extension laterally into the trochlea on knee flexion.
Displacement of the ulna from the trochlea , with humeroradial joint dislocation, is usually achieved only in a patient who has received general anesthesia.
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