The cervical spinal nerve 3 (C3) is a spinal nerve of the

cervical segment The spinal cord is a long, thin, tubular structure made up of nervous tissue, which extends from the medulla oblongata in the brainstem to the lumbar region of the vertebral column (backbone). The backbone encloses the central canal of the spinal ...

.American Medical Association
Nervous System -- Groups of Nerves It originates from the spinal column from above the

cervical vertebra 3 In tetrapods, cervical vertebrae (singular: vertebra) are the vertebrae of the neck, immediately below the skull. Truncal vertebrae (divided into thoracic and lumbar vertebrae in mammals) lie caudal (toward the tail) of cervical vertebrae. In sa ...

(C3).

References

Spinal nerves {{neuroanatomy-stub