The Tilting Angle of the Scapula on the Scapulo-humeral Rhythm

Abstract

Purpose
The movement of the shoulder complex has been described as the scapulo-humeral rhythm by Codman. It has been stated that the scapula moves with the humerus in a 1: 2 ratio in this rhythmic procese.
Changes of the tilting angle of the scapula were continuously evaluated radiographically with an image intensifier in three dimensions during arm elevation and deperssion to analyze this rhythm.
Materials
10 normal shoulders were examined for this study.