Objective: To investigate the effect of Xuanyunding Granule on brainstem auditory evoked potential in model rabbits with posterior circulation ischemic vertigo (PCIV) and qi deficiency and blood stasis. Methods: The PCIV rabbit models with qi deficiency and blood stasis were established. Rabbits in contrast groups were given Sibelium (Western medicine), Xuanyunding Granule (traditional Chinese medicine) and Xuanyunding Decoction. The effects of Xuanyunding Granule on peak latency (PL) and interpeak latency (IPL) of brainstem auditory evoked pot...