Question

Choose the correct sequence of nerves in the spinal cord.

• A. Cervical nerves ⇒Thoracic nerves ⇒ Sacral nerves ⇒ Lumbar nerves
• B. Thoracic nerves ⇒ Cervical nerves ⇒ Lumbar nerves ⇒ Sacral nerves
• C. Cervical nerves ⇒ Thoracic nerves ⇒ Lumbar nerves ⇒ Sacral nerves
• D. Thoracic nerves ⇒ Cervical nerves ⇒ Sacral nerves ⇒ Lumbar nerves

Answer 1

The correct option is C

Cervical nerves ⇒ Thoracic nerves ⇒ Lumbar nerves ⇒ Sacral nerves

The spinal nerves are named according to where it emerges and passes through the bones in the spinal vertebrae.

1. 8 cervical (C1-C8) nerves emerge from the cervical spine; cervical means of the neck (there are 8 cervical nerves, but only 7 cervical vertebrae).

2. 12 thoracic (T1-T12) nerves emerge from the thoracic spine; thoracic means of the chest.

3. 5 lumbar (L1-L5) nerves emerge from the lumbar spine; lumbar means from the lower back region.

4. 5 sacral (S1-S5) nerves emerge from the sacral bone; sacral means of the sacrum, the bony plate at the base of the vertebral column.

5. 1 coccygeal nerve emerges from the coccygeal bone; coccygeal means of the coccyx, the tailbone.