Muscles #2 Origin and Insertion, Function

Question 1

External Intercostals

Answer 1

Origin: inferior border of rib above
Insertion: superior border of rib below

Question 2

Internal Intercostals

Answer 2

Origin: superior border of rib below
Insertion: inferior border of rib above

Question 3

Transverse Abdominus

Answer 3

Origin: iliac crest, inguinal ligament, lumbar fascia, cartilages of ribs 5-10
Insertion: xiphoid process, linea alba, pubis

Question 4

Infraspinatus

Answer 4

Origin: supra-spinous fossa of scapula
Insertion: greater tubercle of humerus

Question 5

Rectus Abdominus

Answer 5

Origin: pubic crest and pubic symphysis
Insertion: cartilage of ribs 5-7

Question 6

Serratus Anterior

Answer 6

Origin: ribs 1-8/9
Insertion: vertebral border + inferior angle of scapula

Question 7

Diaphragm

Answer 7

Origin: diploid process of sternum, costal cartilages and adjacent portions of ribs 7-12, lumbar vertebrae and their intervertebral discs
Insertion: central tendon