Rotator Cuff Muscles
Muscle | Origin | Insertion | Innervation | Action |
---|---|---|---|---|
Infraspinatus | Infraspinous Fossa of Scapula | Greater tubercle of Humerus | Suprascapular n. C4 - C6 |
GHJ: ER, Stabilization |
Subscapularis | Subscapular fossa | Lesser tubercle of Humerus | Upper Subscapular n. Lower Subscapular n. C5 - C6 |
GHJ: IR, Stabilization |
Supraspinatus | Supraspinous Fossa of scapula | Greater tubercle of Humerus | Suprascapular n. C4 - C6 |
GHJ: Initiates abduction, Stabilization |
Teres minor | Greater tubercle of Humerus | Axillary n. C5 - C6 |
GHJ: ER, Weak adduction |
Function
The RTC contributes to movement, stability, and sensorimotor control of the G-H joint2
Special tests
- Drop Arm (Codman’s) Test
References
1.
Gilroy AM, MacPherson BR, Wikenheiser JC, Voll MM, Wesker K, Schünke M, eds. Atlas of Anatomy. 4th ed. Thieme; 2020.
2.
Dutton M. Dutton’s Orthopaedic Examination, Evaluation, and Intervention. 5th ed. McGraw Hill Education; 2020.
Citation
For attribution, please cite this work as:
Yomogida N, Kerstein C. Rotator Cuff Muscles.
https://yomokerst.com/The
Archive/Anatomy/Skeletal Muscles/Upper Limb Muscles/Intrinsic Shoulder
Muscles/Rotator Cuff/rotator_cuff_muscle_group.html