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Figure 4: Straight head hanging test in a patient suffering from apo-PSC- BPPV (a, b) displaces the otoconia in a manner resulting in ampullopetal cupular deflection (d, e). The inhibitory impulses in right posterior ampullary nerve project to right IO and left SR (f) resulting in slow phase VOR (c)

Figure 4: Straight head hanging test in a patient suffering from apo-PSC- BPPV (a, b) displaces the otoconia in a manner resulting in ampullopetal cupular deflection (d, e). The inhibitory impulses in right posterior ampullary nerve project to right IO and left SR (f) resulting in slow phase VOR (c)