Assertion: cervical plexus's rami | /r/CapableOf | join lumbosacral trunk
Facets:
value: to form the sacral plexus
type: PURPOSE
Source sentences:
text: Spinal nerves L4 and L5 make up the lumbosacral trunk, and the anterior rami of sacral spinal nerves S1, S2, S3 and S4 join the lumbosacral trunk to form the sacral plexus.