Intermediate Back Muscles

Question 1

What are the intermediate back muscles

Answer 1

Serratus posterior superior
Serratus posterior inferior
Run from vertebral column to rib cage, elevate and depress ribs
Slight respiratory function

Question 2

Serratus posterior superior

Answer 2

Thin rectangular shaped muscle deep to rhomboid muscles

Question 3

Attachment of serratus posterior superior

Answer 3

Originates from lower part of ligamentum nuchae and C7-T3
Fibres pass in an inferolateral direction attaching to ribs 2-5

Question 4

Action of serratus posterior superior

Answer 4

Elevates ribs 2-5

Question 5

Innervation of serratus posterior superior

Answer 5

Intercostal nerves

Question 6

Serratus posterior inferior

Answer 6

Broad and strong under the latissimus dorsi

Question 7

Attachments of serratus posterior inferior

Answer 7

Originates from T11-L3
Fibres pass in superolateral direction, attach to ribs 9-12

Question 8

Action of serratus posterior inferior

Answer 8

Depresses ribs 9-12

Question 9

Innervation of serratus posterior inferior

Answer 9

Intercostal nerves