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Anatomy: posterior abdominal wall II11 cards
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Derived from dorsal divisions of anterior primary rami of L2, L3, L4.
Derived from ventral divisions of anterior primary rami of L2, L3, L4.
Emerges from lateral border of psoas major. May give branches to psoas and iliacus. Lies outside of fascia covering psoas and iliacus and is therefore outside of femoral sheath.
- Emerges from medial border of psoas major near brim of pelvis, lying posterior to common iliac vessels. - Travels anteriorly and inferiorly, anterior to obturator internus. - Leaves pelvis via superior part of obturator foramen.
Medial side of thigh.
Sympathetic chain of ganglia (paravertebral) lied along anterior border of psoas major. White rami from L1 and L2 pass to ganglia and all ganglia have gray fibers passing back to lumbar nerves.
Around the celiac and superior mesenteric arteries.
1. The 3 thoracic splanchnic nerves 2. branches of the vagus nerves (parasympathetic) 3. branches from sympathetic trunk
Postganglionic sympathetic fibers from plexuses travel with major arteries, along with preganglionic parasympathetic fibers, to innervate viscera (*except for stomach, which gets its own parasympathetic innervation via the anterior and posterior gast
plexuses around aorta continue downward anterior to the aortic bifurcation as superior hypogastric plexus. divides into right and left inferior hypogastric plexuses, which are joined by parasympathetic pelvic splanchnic nerves (S2,3,4)
PARASYMPATHETIC. S2,3,4. Join right and left inferior hypogastric plexuses.
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