Frozen shoulder syndrome includes the involvement of one or more soft structures in the shoulder joint: muscles, tendons, bursae, ligaments, joint capsule or glenoid labrum, which often has no direct relationship to the shoulder injury.
Frozen shoulder syndrome is caused by disorders of the rotator cuff muscles, inflammatory or degenerative involvement, inflammation of the joint capsule, primary disorder of the acromioclavicular joint, secondary changes in the cervical spine, and others.
Severe chronic conditions of frozen shoulder syndrome lead to reflex fibrous contracture of the joint capsule. The mobility of the shoulder joint gradually decreases and results in frozen shoulder.
If the shoulder abduction is painful within a range of about 60-120 degrees, the patient has impingement syndrome, i.e. damage to the rotator cuff tendons or a compression in the subacromial space due to another reason (e.g. bursitis). In impingement syndrome, internal rotation is much more limited and painful than outer rotation, unlike frozen shoulder, where mobility is significantly limited in all directions.
Read the results of the following clinical studies that demonstrate the success rate of low-frequency pulsed magnetic therapy in treatment of this condition.
Related diagnosis: Frozen (stiff) shoulders
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