Posterior Abdominal Wall And Lumbar Plexus Part Of Lecture 13

Front 1

Where is the Lesser Trochanter located?

Back 1

On the medial and somewhat posterior side of the Femur

Front 2

What is at the posterior end of the Pectin Pubis?

Back 2

Iliopubic eminence

Front 3

What muscle(s) of the Posterior Abdominal Wall are the power hip flexors?

Back 3

Psoas Major and Iliacus which make the Iliopsoas

Front 4

What muscle of the Posterior Abdominal Wall can raise the trunk form the supine position?

Back 4

Psoas Major bilateral movement

Front 5

What muscle of the Posterior Abdominal Wall has the main action of trunk extension?

Back 5

Quadratus Lumborum

Front 6

What muscles of the Posterior Abdominal Wall do trunk flexion?

Back 6

Psoas Major at the hip joint
Psoas Minor (weak)
Iliacus (weak)

Front 7

What muscles of the Posterior Abdominal Wall have unilateral contraction providing ipislateral side bending?

Back 7

Psoas Major
Quadratus Lumborum

Front 8

What muscle of the Posterior Abdominal wall provides external rotation at the hip?

Back 8

Psoas Major

Front 9

Name the 3 Apertures of the diaphragm and their levels

Back 9

Caval Hiatus T8

Esophageal Hiatus T10

Aortic Hiatus T12

Front 10

Where do the Gonadal Veins drain into?

Back 10

L drains into the Renal Vein
R drains in the IVC

Front 11

Name the Three unpaired trunks

Back 11

Celiac Trunk (foregut)
Superior Mesenteric Artery (midgut)
Inferior Mesenteric Artery (hindgut)

Front 12

Name the three branches off the Celiac Trunk and where do they go and give rise to.

Back 12

1) Common Hepatic - proper hepatic & gastroduodenal (which branches into the L gastroepiploic and the pancreticoduodenal)
2) Left Gastric - supplies blood to the lesser curvature
3) Splenic Artery - branches the R gastroepiploic

Front 13

Name the first 3 Lumbar Plexus, segmentation and special notes

Back 13

1) Subcostal T12 - Be onto of the Quadratus Lumborum most superiorly

2) Iliohypogastric T12-L1 - crosses the Quadratus Lumborum in the middle superior to ilioinguinal

3) Ilioinguinal L1 travel in the Inguinal Canal to provide sensation for the perineum

Front 14

Name the second 3 Lumbar Plexus, segmentation and special notes

Back 14

4) Genitofemoral L1-L2 - Pierces the Psoas Major and heads toward the ASIS. It branches in two
a) Genital Branch inn the cremaster muscle of the spermatic cord in males
b)Femoral Branch - inn patch of skin in the upper thigh

5) Lateral Cutaneous of the Thigh L2-L3 - It runs directly distal to the ASIS to inn skin of the upper thigh

6) Obturator L2-L4 - found medial to the Psoas Major ALWAYS. heads with the artery to the Obturator Canal. inn MS of the medial compartment of the thigh and skin

Front 15

Name the last nerve of the Lumbar Plexus and the first of the Sacral plexus

Back 15

Femoral Nerve L2-L4 - It is big! Slides under the Inguinal Ligament and inn the Quads, anterior thigh skin and a branch fgoes to the foot for medial cuts inn. Always can be found coming out laterally to the Psoas Major.It

Lumbosacral Trunk L4-L5 - Not part of the Lumbar Plexus. It is a ventral rami of the Sacral plexus. It is DEEP to the obturator and can be found going over the Sacral Wing into the pelvis. The Superior Gluteal Artery classically runs in form of it and posterior to S1 nerve.

Front 16

Sympathetic Trunk in the Lumbar Region - Describe it

Back 16

It is between the Psoas Major and the Vertebral Column. Fine branches leaving the the trunk are Lumbar Splanchnic

Front 17

Where can the Cisterna Chyli be found?

Back 17

Behind the Right Renal Artey.