Orthopaedics The most important physical sign for the diagnosis of anterior instability of the glenohumeral joint is a positive: A Apprehension sign B Impingement sign C Resisted straight arm raising sign D Resisted forearm supination sign 💡 Explanation The most important physical sign for the diagnosis of anterior instability of the glenohumeral joint is a positive: ✓ Correct Answer: A. Apprehension sign