SUBLUXATION OF THE HEAD OF THE RADIUS

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Abstract
While much has been written on subluxation of the head of the radius, the fact remains that no satisfactory explanation of what produces and maintains the deformity has been given. It is hoped that the following history and the succeeding experiments will throw light on the subject. A boy, aged 5, fairly well developed, was pulled across the floor by his left hand while playing with his brother. The following morning, Jan. 1, 1914, he was brought to me. The hand was in nearly complete pronation, and the forearm slightly flexed and held in front of him. He complained of pain in the elbow; there was no swelling, no redness, no heat. Attempts at supination were painful and were resisted; pronation caused no pain. There was tenderness over the head of the radius. Flexion of the forearm was painful. Several attempts at supinating the hand suddenly resulted in a slight

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