Various theories exist regarding the mechanisms of stiff shoulder (SS). Potential etiological factors are adhesive capsulitis, [1] decreased capsular volume, [2,3] capsular contractions, [4 ...

Find out what you need to know about the deltoid muscle and discover how it may affect your health. ... you are using the largest deltoid muscles: the lateral. Posterior deltoids. ... Infraspinatus; ...

In most cases, infraspinatus pain can be resolved with treatments such as rest, stretching, and NSAIDs. It can also occur following a trauma or injury. Here’s what you need to know.

The infraspinatus allows for external rotation and posterior abduction of the upper extremity. Along with the infraspinatus muscle, the teres minor assists in external rotation of the shoulder.

Weakness or pain in the affected shoulder suggests injury of the infraspinatus muscle. ... Next, apply pressure to the shoulder, pressing in a posterior direction.

A 35-year-old right-hand dominant male physician presented to our clinic with atraumatic, sudden onset left shoulder weakness without any associated pain. The patient had no history of prior ...

Posterior shoulder dislocation occurs when the top of the upper arm bone, known as the humerus, moves backward out of its socket. This causes pain, muscle spasms, and a limited range of motion.

When we examined the patient’s shoulder, we saw severe atrophy of the right infraspinatus muscle with 4/5 strength in external rotation. O’Brien compression test (resisted shoulder flexion to 90°, ...

PD a posterior deltoid; IF b infraspinatus; TM c teres minor FLEX-SF d Flexilever Scale of Shoulder Function. *: There were significant differences between 2 groups ( P < 0.005) ...