Acute onset vertigo work-up
Clinical and lab tests
Serum glucose
HSV-1 serology (vestibular neuritis)
Caloric responses
Neurophysiology
Audiometry
EEG (vestibular epilepsy)
Electronystagmography
BAEP
Transtympanic electrocochleography
Blink reflex
Neuroimaging
High resolution temporal bone CT scan (perilymph fistula)
Brainstem MRI (specific focus if required)
Brainstem MRA