[Vertical downbeat nystagmus in benign paroxysmal positional vertigo]. / Vertikal'nyi nistagm vniz pri dobrokachestvennom paroksizmal'nom pozitsionnom golovokruzhenii.

Benign paroxysmal positional vertigo (BPPV) is the most common peripheral vestibulopathy. Ppatients with BPPV contact with otorhinolaryngologists in 25% of cases. Due to the polymorphism of this pathology, an urgent task is to asess differential diagnosis of BPPV with various variants of the central positional syndrome: vestibular migraine, myofascial cervical syndrome, organic changes in the structures of the cerebellum. OBJECTIVE: To distinguish atypical forms of BPPV with downbeating vertical nystagmus and the central positional syndrome.

[Etiology and clinical symptoms of bilateral vestibulopathy]. / Etiologiya i klinicheskie proyavleniya dvustoronnei vestibulopatii.

OBJECTIVE: To identify etiology, clinical symptoms of bilateral vestibulopathy (BV) depending on etiology. RESULTS: Idiopathic BV was identifies in one third of patients. The most common identified reasons are Meniere's disease, meningitis and ototoxicity. BV develops more often without incidental hearing loss in case of idiopathic, autoimmune etiology, ototoxicity and bilateral vestibular neuronitis. BV after neuroinfection is characterized by prompt symptoms development, bilateral severe hearing loss, Gain reduction in vHIT lower 0.4 and loss of more than 8 lines in DVA test. CONCLUSION: BV after bilateral Meniere's disease is characterized by Gain higher than 0.4 and typical clinical picture of the primary disease.