Coccygeal spinal nerve

Definition
noun, plural: coccygeal spinal nerves
Any of the pair of nerves that emerge from the coccygeal region of the spinal cord, through the coccygeal vertebrae of the vertebral column
Supplement
The spinal nerve is a nerve that occurs in pairs emerging from the spinal cord. Each pair is attached to the cord by two roots, i.e. the anterior (ventral) and posterior (dorsal) roots. Although these two roots unite in the intervertebral foramen they divide again into anterior division (or ventral ramus) and posterior division (or dorsal ramus).¹ In humans, there are 31 pairs of spinal nerves emerging from the spinal cord and are grouped based on the corresponding regions of the vertebral column, i.e. cervical spinal nerves, thoracic spinal nerves, lumbar spinal nerves, sacral spinal nerves, and coccygeal spinal nerves. These nerves emerge from the spinal cord through an opening called intervertebral foramen (an opening between adjacent vertebrae of the vertebral column).
The coccygeal spinal nerves are spinal nerves emerging from the coccygeal region of the spinal cord, and to the corresponding vertebra. The coccygeal spinal nerves (C1) arise from the conus medullaris and distributed to the skin over the back of the coccyx.
See also:

• spinal nerve

Reference(s):

¹ spinal nerve. (n.d.). The American Heritage® Science Dictionary. Retrieved from Dictionary.com website http://www.dictionary.com/browse/spinal-nerve