Anatomy: posterior abdominal wall II11 cards

Tagged as: anatomy, travel

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origin of femoral nerve

Derived from dorsal divisions of anterior primary rami of L2, L3, L4.


origin of obturator nerve

Derived from ventral divisions of anterior primary rami of L2, L3, L4.


path of femoral nerve

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.


path of obturator nerve

- 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.


Obturator nerve supplies...

Medial side of thigh.


Autonomic nervous system in the abdomen

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.


Location of celiac ganglia and plexuses

Around the celiac and superior mesenteric arteries.


Celiac plexuses are joined by...

1. The 3 thoracic splanchnic nerves 2. branches of the vagus nerves (parasympathetic) 3. branches from sympathetic trunk


Celiac ganglia and plexuses

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


Superior hypogastric plexus

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)


Pelvic splanchnic nerves

PARASYMPATHETIC. S2,3,4. Join right and left inferior hypogastric plexuses.