Effectiveness of the STANDING Algorithm for the Differential Diagnosis of Vertigo

Inclusion Criteria: * patients over 18 years of age. * patients affected by vertigo, dizziness or balance disorder. Exclusion Criteria: * age under 18. * patients unable to cooperate (with severe dementia or incapable to provide consensus). * patients affected by disease of cervical spine or any trauma of this part of body that contraindicate the manipulation of neck. * impractical follow-up. * dying patient (less three estimated months to live). * patients with neurologic deficit identified during triage examination (Cincinnati Prehospital stroke scale, CPSS\>0) of suffering from another disease that can be the cause of dizziness/balance disorder (e.g. anemia, arrhythmia, hypoglycemia, alcoholic intoxication). * patients without symptoms at the time of examination. * patients who deny the participation in the study.