Posterior Abdominal Wall Flashcards
(38 cards)
What are the superior attachments of the quadratus lumborum?
- supero-medial border of rib 12
- lumbar transverse processes
What are the inferior attachments of the quadratus lumborum?
- iliolumbar ligament
- internal lip of iliac crest
What is the innervation of the quadratus lumborum?
ventral primary rami (T12-L4)
What are the superior attachments of the psoas major & minor?
vertebrae + intervertebral discs of T12-L5
What is the inferior attachment of the psoas major & minor?
lesser trochanter
What is the innervation of the psoas major & minor?
ventral primary rami (L1-3)
What is the superior attachment of the iliacus?
superior 2/3 iliac fossa
What is the inferior attachment of the iliacus?
lesser trochanter
What is the innervation of the iliacus?
femoral n
What are the 3 portions of the diaphragm?
- Sternal portion = post. surface of xiphoid process
- Costal portion = inner costal cartilage & arcuate ligaments
- Lumbar portion = right + left crura (tendons)
What are the opening in the diaphragm?
- IVC (& phrenic n.) -> T8
- Esophagus (& vagus n.) -> T10
- Aorta -> T12
Where do the medial & lateral arcuate ligaments pass?
- med: passes over psoas major
- lat: passes over quadratus lumborum
What are the right & left crura?
- right: wraps around esophageal hiatus (to act as esophageal sphincter)
- left crus: wraps around aortic hiatus
In the diaphragm, what are the characteristics of the sympathetic trunk?
- from thoracolumbar region
- ganglia located along either side of the spine
- provides “fight or flight” response
In the diaphragm, what are the characteristics of the parasympathetic trunk?
- from craniosacral region
- ganglia located in organs + tissues
- provides “rest & digest” response
In the diaphragm, what does each nerve contain?
afferent + efferent nerve fibers
What fibers does sensory innervation involve?
afferent -> conduct signals from stimuli to brain
What fibers does motor innervation involve?
efferent -> conduct signals from brain to muscle
How can diaphragm pain be felt as shoulder pain?
because of innervation by the phrenic nerve
How is a hiatal hernia formed?
weak esophageal sphincter= right crus
What is the arterial supply of the thoracic surface of the diaphragm?
- Pericardiophrenic arteries
- Musculophrenic arterial brs.
- Superior phrenic arteries [off thoracic aorta]
What is the arterial supply of the abdominal surface of the diaphragm?
- Inferior phrenic arteries
- 1st pair of arteries off abdominal aorta
What is the innervation of the posterior abdominal wall? (S.I.I.G.L.F.O.A.L.)
- Subcostal n. = travels post. to kidneys
- Iliohypogastric n. = travels post. to kidneys
- Ilioinguinal n.= travels post. to kidneys
- Genitofemoral n. = anterior to psoas major m.
- Lateral Cutaneous n.
- Femoral n. = lateral to psoas major m.
- Obturator n. = medial to psoas major m.
- Accessory Obturator n.
- Lumbosacral Trunk
What are the branches off the abdominal aorta for the arterial supply of the posterior abdominal wall?
- celiac trunk -> common hepatic a., splenic a., left gastric a.
- sup mesenteric a.
- inf. mesenteric a.
