Assertion: lumbar plexus | /r/CapableOf | lie on posterior abdominal wall
Facets:
value: in the retroperitoneum
type: LOCATION
Source sentences:
text: The lumbar plexus (Fig.) lies on the posterior abdominal wall in the retroperitoneum and is formed within the substance of the psoas major muscle from the union of the anterior primary rami of L1–L3 and most of L4 spinal nerves (Fig.).