Posterior Abdominal Wall

Question 1

what covers the posterior abdominal wall?

Answer 1

andoabdominal fascia which lies btwn the parietal peritoneum and the muscles

continuous with transversalis fascia

Question 2

what covers the psoas major muscle?

Answer 2

psoas fascia

attached medially to lumbar vertebrae and pelvic brim

Question 3

What are the attachments of the psoas fascia?

Answer 3

superiorly forms medial arcuate ligament
fuses laterally with quadratus lumborum + thoracolumbar fascias
pasteriorly continuous with the iliac fascia

Question 4

What is the thorocolumbar fascia attached to and what are its layers?

Answer 4

the vertebral column medially where it has posterior, middle + anterior layers with muscles in btwn

thick towards lumbar, thin towards thoracic bones
like linea alba but with more support

Question 5

what are the attachments of the posterior and middle layers of the thorocolumbar fascia?

Answer 5

laterally to internal oblique + transversus abdominis

superiorly to latissimus dorsi

Question 6

what is the attachment of the anterior thorocolumbar layer?

Answer 6

transverse process of the lumbar vertebrae, iliac crest, 12th rib

Question 7

what are the 3 paired muscles of the posterior abdominal wall?

Answer 7

1. psoas major (inferolaterally)
2. iliacus (lateral side of psoas major)
3. quadratus lumborum (adjacent to transverse process of lumbar vertebrae)