Abdominal wall continued againnnnn Flashcards
This muscle is not always present
-Does not cross the hip
Psoas minor muscle
Where does the psoas minor attach?
Iliopectineal arch to the superior pubic ramus
What is the main function of the psoas minor muscle
proprioceptive
Does the thoracolumbar fascia contribute to the posterior abdominal wall?
Yes
Since the posterior wall is NOT flat, what are the 2 components that lie on each side of the central prominence
the 2 paravertebral gutters
What lies in the paravertebral gutters and are incased in fat
The kidneys
The anterior fascial covering of the QL is continuous with the…
Transverse abdominal muscle
The QL thickens superiorly to from the _____
Lateral arcuate ligament
If you lose abducting power by the gluteus medius m, ______ (a muscle) lifts the hemipelvis to initiate abduction
The QL
These muscles…
- Travel deep into the inguinal ligament
- Attach on the lesser trochanter of the femur
- Stabilize the hip joint
-Psoas major
-Iliacus
(iliopsoas)
This muscle plays a role in laterally flexing the vertebral column?
Psoas major
What is the innervation for the psoas major
Upper lumbar anterior rami
What is the innervation for the iliacus
Femoral nerve
What are the 3 muscular parts of the diaphragm?
- Sternal part
- Costal part
- Lumbar part
The 3 muscular parts attach to structures to form _____
The inferior thoracic aperture
The _____ crosses the midline to form the esophageal hiatus
Right crus
There are paired ______ and _____ arcuate ligament and a single ______ arcuate ligament
Paired= Lateral and medial Single= median
What is the blood supply for the diaphragm?
- Pericardiacophrenic artery
- Superior and inferior phrenic artery
This nerve…
- Supplies the oblique muscles
- Skin over the anterolateral abdominal wall (superior to iliac crest and inferior to umbilicus)
Subcostal nerves (T12)
This nerve…
- Splits
- More superior nerve of the split
- Travels across the QL and it pierces the transverse abdominal layer
- Penetrates back wall and gives cutaneous branches
Iliohypogastric Nerve (L1)
What does the iliohypogastric nerve innervate?
- Skin over iliac crest
- upper inguinal and hypogastric regions
- superiolateral quadrant of butt
- Internal oblique
- Transverse abdominal muscle
This nerve…
- More inferior to the split
- Travels closer to the ASIS
- Travels down the inguinal canal to the testes
Ilioinguinal Nerve (L1)
What does the ilioinguinal nerve innervate?
- Skin over the lower inguinal region
- Mons pubis
- Labia majora
- Anterior scrotum
- Adjacent medial thigh
- Inferior most internal oblique and transverse abdominal muscles
This nerve…
-Pierces the psoas major muscle and divides into genital and femoral branches
Genitofemoral nerve
This nerve…
- Goes to the spermatic cord to the cremaster muscle
- Goes through the inguinal canal
- Goes lateral to enter the canal and then gets into the canal
Genital branch of the genitofemoral nerve
This nerve…
- Supplies cutaneous innervation to the skin overlying the femoral triangle
- Female= anterior labia majora
- Male= anterior scrotum and proximal medial thigh
Femoral branch of the genitofemoral nerve
This nerve…
- Emerges posterior to the psoas and runs on the iliacis toward the lateral part of the inguinal ligament
- medial to the ASIS and proximal thigh
Lateral cutaneous nerve of the thigh
This nerve…
-Emerges near the lateral border if the psoas
Femoral nerve
What does the femoral nerve supplies
- Iliacus
- Flexors of the hip
- Extensors of the knee
- Skin on the anterior thigh
This passes over the ala of the sacrum to participate in the sacral plexus
Lumbosacral trunk
Typically, how many lumbar paravertebral sympathetic ganglia are there?
4- and they are deep to the psoas major
These are the main source of presynaptic sympathetic fibers to the abdominal viscera
-Thoracic splanchnic nerves
The greater, lesser, and least splanctnic nerves pierce the crura of the diaphragm and are destined for the… (3)
- Celiac
- Superior mesenteric
- Aorticorenal ganglia
Are the postsynaptic sympathetic neurons that are going to the abdominal wall and lower limbs gray or white rami?
Gray rami
Gray rami from intercostal nerves go to…
The abdominal wall
Gray rami from the lumbar plexus go to…
Lower limbs
The vagus nerves participate in the _______ plexus and emerge as _____
- Esophageal plexus
- Emerge as anterior and posterior vagal trucks
Where do the anterior and posterior vagal trunks travel?
-Pass through the esophageal hiatus on the anterior and posterior surfaces on the esophagus and stomach
All parasympathetic fibers that are destined for the gut are ______
Presynaptic (the ganglia are located within the walls of the target organs)
Where does the abdominal aorta begin and end?
- The aortic hiatus (around T12)
- Ends by dividing into left and right common iliac arteries (L4)
This branch supplies the foregut
Celiac trunk
This branch supplies the midgut
Superior mesenteric artery
This branch supplies the hindgut
Inferior mesenteric artery
This can be thought of as a very small continuation of the abdominal aorta
Medial sacral artery
Where does the right renal vein and the right gonadal vein drain into?
The IVC
What does the IVC pass through in the diaphragm?
The caval hiatus
These 2 arteries serve the body wall
- Inferior phrenic a
- Lumbar a
What sac collects all the lower body lymph of the thoracic duct
Cysterna chili
