Question

The number of spinal nerves in human is

• A. 43 pairs
• B. 10 pairs
• C. 12 pairs
• D. 31 pair.

Answer 1

Answer: (D)

Spinal nerve is a mixed nerve which comprised of motor, sensory, and autonomic signals between the spinal cord and the body. In humans there are 31 pairs of spinal nerve one on each side of the vertebral column they includes 8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal. The cervical nerves are from the cervical vertebrae. The thoracic nerves emerging from the thoracic vertebrae, each thoracic nerve T1 -T12 originates from below each corresponding thoracic vertebra. . The lumbar nerves are from the lumbar vertebrae. They are divided into posterior and anterior divisions. The sacral nerves which exit the sacrum at the lower end of the vertebral column. The coccygeal nerve is the 31st pair of spinal nerves. It arises from the conus medullaris, and its anterior root helps form the coccygeal plexus.

So, the correct answer is option D.