Benign paroxysmal vertigo of the horizontal canal.
Over a period of 4 years we observed 15 cases of benign positional vertigo (BPV) probably caused by deposition of otoliths in the horizontal semicircular canal. Rapid rolling onto one side in recumbent position provokes a paroxysmal, purely horizontal and geotropic nystagmus which nearly always spontaneously inverts direction. Rolling the patient onto the other side provokes a left intense geotropic nystagmus. BPV is more violent but resolves more rapidly than that of the better known posterior canal positional vertigo. Sometimes both syndromes are present together.
Pagnini
P
P
Service of Audiology, University of Florence, Italy.
Nuti
D
D
Vannucchi
P
P
D000328:Adult; D000368:Aged; D004584:Electronystagmography; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009759:Nystagmus, Pathologic / Q000209:etiology; D011187:Posture; D012665:Semicircular Canals / Q000503:physiopathology*; D014717:Vertigo / Q000209:etiology*