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Infraspinatus – transverse

Patient Positioning

Patient seated on a revolving stool, arm in slight internal rotation. Elbow flexed (90°), palm up (hand can be placed on the ipsilateral thigh).

Probe Positioning

After scanning the glenohumeral joint, the tendons and muscle bellies on transverse planes (long axis of the tendons) examine these structures on their short axis statically and dynamically (internal and external rotation of the arm).

Sonogram: Shoulder posterior infraspinatus transverse
Sonogram: Shoulder posterior infraspinatus transverse

Note: The subdeltoid subacromial bursa lies between the deltoid muscle and the rotator cuff tendos. Small amounts of fluid may not be visible using to much pressure with the transducer.