⭐ 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/rotatorcuff/

⭐ 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/teresmino...
Subscapularis: https://bodyworksprime.com/subscapula...

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