Assertion: lumbar plexus's branch | /r/CapableOf | use loss of resistance
Facets:
Source sentences:
text: They believed that branches of the lumbar plexus and parts of the sacral plexus were located close to each other in a “compartment” between the psoas major and quadratus lumborum muscles at the level of the L4 vertebral and could be identified using “loss of resistance.