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- Use of this artwork requires proper credit to be given (Permission: Dr. Joe Muscolino. www.learnmuscles.com – art work Giovanni Rimasti)
The infraspinatus is one of the four Rotator Cuff muscles. The four Rotator Cuff muscles are:
- Supraspinatus
- Infraspinatus
- Teres Minor
- Subscapularis
ATTACHMENTS:
- The infraspinatus attaches from the infraspinous fossa of the scapula to the greater tubercle of the humerus.
ACTIONS:
- Laterally rotates the arm at the glenohumeral joint
- Horizontally extends the arm at the glenohumeral joint
NOTES:
- The infraspinatus and teres minor both laterally rotate the arm at the shoulder (glenohumeral) joint.
- The infraspinatus is the “I” of SITS (Supraspinatus, Infraspinatus, Teres minor, Subscapularis), an acronym for the rotator cuff group.
