Cervical vertigo is a diagnosis of exclusion.So you need to establish that the vertigo is not being caused by BPPV, unilateral labrythine hypofunction or vertigo of central origin.Cervical vertigo presents with dysequilibrium lightheadedness,cervical pain,ataxia and limited cervical motion,make sure dizziness is not vertibrobasilar insufficiency There needs to be a relationship between the vertigo and cervical pain.Treatment is Atlanto -occipital distraction/or mobilisation of rotation between C1 and C2