Intrasubscapularis

Intrasubscapularis refers to anatomical structures located within the subscapularis muscle. The subscapularis is one of the four rotator cuff muscles, originating from the subscapular fossa of the scapula and inserting on the lesser tubercle of the humerus. Its primary function is internal rotation of the arm and adduction.

Within the substance of the subscapularis muscle, one might find various anatomical variations or pathologies. These could include the presence of accessory muscle fibers, intramuscular bursae, or vascular anomalies. Pathologically, tears of the subscapularis muscle can occur, and some may be entirely contained within the muscle belly, referred to as intrasubscapular tears. Tendinopathy, or inflammation of the tendon, can also affect the muscle and its surrounding tissues.

Diagnostic imaging techniques such as ultrasound or magnetic resonance imaging (MRI) are typically used to identify and characterize intrasubscapularis findings. These assessments are crucial for understanding the extent of any injury or abnormality and for guiding appropriate treatment strategies, which may range from conservative management to surgical intervention. The clinical significance of intrasubscapularis structures depends heavily on their specific nature and any associated symptoms they may cause, such as pain or restricted movement.