No circumscribed abnormality found on head CT (not uploaded), but in case of unexplained focal neurological symptoms (headache at the back of the head, posterior circulation stroke symptoms) one might raise the suspicion of vertebral artery dissection as the fracture line extends to the vertebral canal.

Being aware of congenital vertebral malformations (as C1 fusion defect in the midline here) can be useful in a trauma case like this not to highlight these as trauma-related findings.