Question

What are the nerve roots/nerves covered in lumbar plexus block?

1) L1-L4
2) L2-L5
3) L3-L6
4) L4-L7

Answer 1

The lumbar plexus block typically covers spinal nerves L1 to L4, concerning the femoral and saphenous nerve branches responsible for enervating the pelvic regions and anterior leg, but not the sciatic nerve which originates from the sacral plexus.

Step-by-step explanation:

The nerve roots covered in the lumbar plexus block are typically spinal nerves L1 to L4. The lumbar plexus arises from all the lumbar spinal nerves and is responsible for enervating the pelvic region and the anterior leg, with the femoral nerve being one of its major branches that further gives rise to the saphenous nerve extending through the anterior lower leg. It is important to note that the sacral plexus, which is related to lumbar nerves L4 and L5, gives rise to the major systemic nerve known as the sciatic nerve.