cervical spine

in vertebrates
https://doi.org/10.1351/goldbook.11672
Part of the spine immediately inferior to the skull and connecting to the thoracic spine, made up of seven vertebrae.
Source:
PAC, 2015, 87, 841. (IUPAC Glossary of terms used in neurotoxicology (IUPAC Recommendations 2015)) on page 856 [Terms] [Paper]