Lumbar Spinal Nerve Root

**Semantic type:** Body Part, Organ, or Organ Component

**Definition:** The initial portion of a lumbar spinal nerve, formed by the union of a dorsal sensory root and ventral motor root, as it originates from the spinal cord; there are five lumbar nerve roots on each side of the vertebral column, which exit the column inferior to their corresponding vertebral body level.

**Synonyms:** - Lumbar Spinal Nerve Roots