The pectoralis minor muscle contributes to a sharp stabbing pain in the chest, aching in the upper back, shoulder, pain and numbness in arm, elbow and hand. Type pain in the shoulder and arm joint press Enter to search.
What are the pain and symptoms associated with the pectoralis minor muscle? Where is the pectoralis minor muscle? The pectoralis minor attaches the front of the shoulder blade to the 3rd, 4th and 5th ribs. What movements does the pectoralis minor muscle control? The pec minor is a major contributor to rounded shoulder posture. When the pectoralis minor muscle tightens and shortens, it pulls the shoulders forward which then causes upper back pain. Pectoralis minor pain patterns closely mimic the pectoralis major pain patterns.