rotator cuff

Question 1

Supraspinatus

Answer 1

Origin:
* Supraspinous fossa of
scapula
Insertion:
* Greater tubercle of
humerus
Action:
* Provides strength and
stability to shoulder joint
* Initiates arm abduction

posterior order suproro to ninferior:
Supraspinatus
infraspinatus
teres minor

Question 2

Infraspinatus

Answer 2

Infraspinatus
Origin:
* Infraspinous fossa of
scapula
Insertion:
* Greater tubercle of
humerus
Action:
* Provides strength to
posterior component of
shoulder joint
* Lateral rotation of
humerus

Question 3

Teres Minor

Answer 3

Origin:
* Lateral border of scapula
Insertion:
* Greater tubercle of
humerus, below
infraspinatus
Action:
* Provides posterior
support to the shoulder joint
* Lateral rotation of
humerus
* Adduction of humerus

Question 4

Subscapularis anterior

Answer 4

Origin:
* Subscapular fossa of
scapula
Insertion:
* Lesser tubercle of
humerus
Actions:
* Provides strength to
shoulder joint capsule
* Medial rotation of
humerus
* Adduction of humerus