Question

Along which vertebral levels does the lumbar plexus run?

A) L1-L4
B) L2-L5
C) L3-S1
D) L4-S3

Answer 1

The lumbar plexus runs along the vertebral levels L1-L4 and gives rise to nerves that innervate the pelvic region and anterior leg. The sacral plexus arises from the lower lumbar nerves L4 and L5 and the sacral nerves S1 to S4.

Step-by-step explanation:

The lumbar plexus runs along the vertebral levels L1-L4.

The lumbar plexus arises from all the lumbar spinal nerves and gives rise to nerves enervating the pelvic region and the anterior leg. The femoral nerve is one of the major nerves from this plexus, which gives rise to the saphenous nerve as a branch that extends through the anterior lower leg.

The sacral plexus comes from the lower lumbar nerves L4 and L5 and the sacral nerves S1 to S4. The most significant systemic nerve to come from this plexus is the sciatic nerve.