Post shoulder muscles

Question 1

Supraspinatus- O, I, IN, A

Answer 1

O- supraspinus fossa + fascia

I- Sup facet of greater tubercle of humerus

In- Suprascap n C5,6

A- abduction to 15degrees

Question 2

Infraspinatus- O, I, IN, A

Answer 2

O- Infraspinatus fossa

I- middle facet of greater tubercle

IN- Suprascap n C5,6

A- Pwerfull lat rotator

Question 3

Teres min- O, I, In, A

Answer 3

O- post surface of lat border of scap

I- Inf facet of greater tubercle

IN- Axillary c5,6

A- lat rotates arm

Question 4

Teres Maj- O, I, In, A

Answer 4

O- post surface of inf angle of scap

I- medial lip of intertubecular groove of humerus

In- lower scap n C5-7

A- med rotates arm, adducts, extends

Question 5

Serratus ant- O, I, IN, A

Answer 5

O- upper 8 ribs (angles/upper border)

I- Medial scap border costal side, inf scap angle

IN- long thoracic n c5-7

A- holds scap against wall, protraction, rotates scap up