On the chart below you will see 4 Columns (Vertebral Level, Nerve Root, Innervation, and Possible Symptoms). Under ‘Vertebral Level’: L1-L5 is the LOWER BACK. Simply line up the “Vertebral Level” with the “Possible Symptoms” and you will see some surprising connections of symptoms that relate to your spine.
In humans there are 31 pairs: 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal. Each pair connects the spinal cord with a specific region of the body. Near the spinal cord each spinal nerve branches into two roots.