Rotator Cuff Anatomy: Origin, Insertion & Action

⭐ Rotator Cuff Muscle Anatomy ⭐
💪 Supraspinatus 💪
🦴 Origin: Supraspinous fossa of scapula
🦴 Insertion: Greater tubercle of the humerus (superior aspect)
🦴 Action: Abduction of arm & stabilisation of the humerus in glenohumeral joint
🦴 Innervation: Suprascapular nerve (C5, C6)
🦴 Blood supply: Suprascapular artery

💪 Infraspinatus 💪
🦴 Origin: Infraspinous fossa
🦴 Insertion: Greater tubercle of the humerus (posterior aspect)
🦴 Action: External rotation of the arm & stabilisation of the humerus in glenohumeral joint
🦴 Innervation: Suprascapular nerve (C5, C6)
🦴 Blood supply: Suprascapular and circumflex scapular arteries

💪 Teres minor 💪
🦴 Origin: Posterior surface of the lateral border of the scapula
🦴 Insertion: Greater tubercle of the humerus (inferior aspect)
🦴 Action: Lateral rotation of the humerus, stabilisation of the humerus in glenohumeral joint & can very weakly assist in shoulder adduction
🦴 Innervation: Axillary nerve (C5, C6)
🦴 Blood supply: Subscapular artery, circumflex scapular artery & posterior circumflex humeral artery

💪 Subscapularis 💪
🦴 Origin: Subscapular fossa
🦴 Insertion: Lesser tubercle of humerus
🦴 Action: Internal rotation of the shoulder, stabilisation of glenohumeral joint & can very weakly assist in shoulder adduction
🦴 Innervation: Upper and lower branches of the subscapular neve (C5, C6, C7)
🦴 Blood supply: Subscapular artery

Chapters:
0:00 - Intro
0:13 - Location & overview of the rotator cuff muscles
1:49 - Origin & insertion of the rotator cuff muscles
4:00 - Actions of rotator cuff muscles
7:21 - Outro & actions summary

⭐ Want to learn more about the rotator cuff? Then check out the full article on the Bodyworks Prime website: https://bodyworksprime.com/rotator-cuff/

⭐ If you would like some help memorising the rotator cuff muscle information then be sure to check out the free rotator cuff flashcards:
Supraspinatus: https://bodyworksprime.com/supraspina...
Infraspinatus: https://bodyworksprime.com/infraspina...
Teres minor: https://bodyworksprime.com/teres-mino...
Subscapularis: https://bodyworksprime.com/subscapula...

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