Introduction: In patients with benign paroxysmal positional vertigo. BPPV; a torsional-vertical down beating positioning nystagmus can be elicited in the supine straight head-hanging position test or in the Dix-Hallpike test to either side. This type of nystagmus can be explained by either an anterior canal BPPV or by an apogeotropic variant of the contralateral posterior canal BPPV U... https://herbsdailyes.shop/product-category/medical-and-ambulatory-supplies-ambulatory-equipment/