What are the 5 divisions of spinal nerves?

1. Cervical spinal nerves: There are 8 pairs of cervical spinal nerves, numbered C1 through C8. They arise from the cervical region of the spinal cord and provide innervation to the neck, shoulder, and arm.

2. Thoracic spinal nerves: There are 12 pairs of thoracic spinal nerves, numbered T1 through T12. They arise from the thoracic region of the spinal cord and provide innervation to the chest, back, and abdominal muscles.

3. Lumbar spinal nerves: There are 5 pairs of lumbar spinal nerves, numbered L1 through L5. They arise from the lumbar region of the spinal cord and provide innervation to the lower back, pelvis, and legs.

4. Sacral spinal nerves: There are 5 pairs of sacral spinal nerves, numbered S1 through S5. They arise from the sacral region of the spinal cord and provide innervation to the pelvic organs, lower limbs, and perineum.

5. Coccygeal spinal nerves: There are 1 pair of coccygeal spinal nerves, numbered Co1. They arise from the coccygeal region of the spinal cord and provide innervation to the coccyx and surrounding area.