Which region contains 12 spinal nerves?

Which region contains 12 spinal nerves?

• A. Cervical
• B. Lumbar
• C. Sacral
• D. Thoracic (12)

Answer: (D)

Spinal nerves are organized by region and come in fixed numbers that match the vertebral segments they serve. The thoracic region has twelve pairs of nerves, labeled T1 through T12, each exiting the spinal column with its corresponding thoracic vertebra. This alignment with the twelve thoracic vertebrae gives the thoracic region its dozen nerves. In contrast, the cervical region has eight nerves (one extra nerve in this region beyond the seven vertebrae), while the lumbar and sacral regions each have five nerves. So, the region that contains 12 spinal nerves is the thoracic region.

Spinal nerves are organized by region and come in fixed numbers that match the vertebral segments they serve. The thoracic region has twelve pairs of nerves, labeled T1 through T12, each exiting the spinal column with its corresponding thoracic vertebra. This alignment with the twelve thoracic vertebrae gives the thoracic region its dozen nerves. In contrast, the cervical region has eight nerves (one extra nerve in this region beyond the seven vertebrae), while the lumbar and sacral regions each have five nerves. So, the region that contains 12 spinal nerves is the thoracic region.