Abdominal Origins/ Insertions

Question 1

Cremaster

Answer 1

Origin:
Inguinal lig. - may be part of IAO m.

Insertion:
Pubic bone (loops in spermatic cord)

Question 2

Quadratus Lumborum

Answer 2

Origin:
The medial ½ of the inferior border of the 12th rib and the TVP of L1-L4

Insertion:
The posteromedial iliac crest and the iliolumbar lig.

Question 3

EAO

Answer 3

Origin:
Anterior iliac crest, pubic bone, abdominal aponeurosis; the pubic crest and tubercle

Insertion:
The inferior border of the lower eight ribs (ribs 5-12)

Question 4

IAO

Answer 4

Origin:
The lateral ⅔ of the inguinal lig., iliac crest, and the thoracolumbar fascia

Insertion:
Lower three ribs (10-12) and the abdominal aponeurosis

Question 5

Rectus abdominis

Answer 5

Origin:
The crest and symphysis of the pubis

Insertion:
Xiphoid process and the cartilage of ribs 5-7

Question 6

Transversus abdominis

Answer 6

Origin:
The lateral ⅔ of the inguinal lig., iliac crest, thoracolumbar fascia, and the lower six costal cartilages of ribs 7-12

Insertion:
Abdominal aponeurosis

Question 7

Pyramidalis

Answer 7

Origin:
Anterior pubic bone

Insertion:
Inferior linea alba