Shoulder blade pain can have many different causes. Although you may assume you sustained an injury or simply slept in the wrong way, the pain might actually be related to your heart, lungs, spine, abdomen, or pelvis. In cases like these, the pain may be referred, meaning that a problem in one part of the body excites nerves that trigger pain in another part of the body, such as your shoulder blade.
Reverse shoulder arthroplasty (RSA) increases the moment arm of the deltoid, however there is limited knowledge on the accompanying changes in muscle architecture that play a role in muscle force production. The purpose of our study is to use a geometric shoulder model to evaluate the anterior deltoid, middle deltoid, and supraspinatus regarding 1) differences in moment arms and muscle-tendon lengths in small, medium, and large native shoulders, and 2) impact of three RSA designs on moment arms, muscle fiber lengths, and force-length (F-L) curves.
The neck and shoulders are complex and interconnected areas, and medical problems that affect one often affect the other, as well. Pain and dysfunction from injuries or conditions that impact the joints, muscles, and other structures can easily spread from the neck to the shoulder(s) and from the shoulder(s) to the neck.
Your shoulder is a ball and socket joint and very mobile. It may hurt for many reasons, from injury and overuse to chronic conditions or diseases. You need to know the cause to get effective treatment.
Collarbone pain is usually caused by an injury, such as a fracture or joint separation. However, your collarbone (clavicle) can also hurt because of health conditions like arthritis or even certain sleeping positions.
