Light Cupula: Recent Updates

Benign paroxysmal positional vertigo (BPPV) is the most common cause of and nystagmus. Direction-changing nystagmus (DCPN), which refers to change in direction with different head positions, a well-known characteristic horizontal semicircular canal BPPV. The supine roll test commonly used diagnose However, persistent geotropic DCPN observed during this cannot be explained by conventional mechanisms canalolithiasis or cupulolithiasis. concept “light cupula” has been proposed account for unique In review, we summarize historical background, clinical features diagnostic methods, presumed mechanisms, treatment approaches light cupula phenomenon based on available literatures up date.