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Bony landmarks

Three bony prominences can be identified. On an extended elbow they lie in one line. Laterally is situated the lateral epicondyle and medially the medial epicondyle. In between lies the olecranon, gross and prominent. During flexion of the elbow the olecranon moves downwards
which makes its apex easily palpable. In a bent elbow the three bones form an isosceles triangle. Between the olecranon and the medial
epicondyle lies the sulcus for the ulnar nerve.

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