Which nerves have only one count in the human body?

Coccygeal nerves are unique in the human nervous system as they typically consist of a single pair in adults. This makes them distinct from other types of spinal nerves, which are generally present in multiple pairs. The coccygeal nerves emerge from the coccyx, or tailbone, region of the vertebral column and primarily contribute to the sensory and motor innervation of the area around the coccyx.

Other nerve groups, such as cervical, sacral, and thoracic nerves, are organized into multiple pairs. Cervical nerves typically consist of eight pairs, sacral nerves have five pairs, and thoracic nerves also have twelve pairs. This difference in quantity highlights the distinctive nature of coccygeal nerves, as there is only one pair found within the human body, making them an important focal point in the study of human anatomy and the nervous system.