Light Cupula:To Be Or Not to Be?  

作　　者：Su-lin ZHANG E TIAN Wen-chao XU Yu-ting ZHU Wei-jia KONG 

机构地区：[1]Department of Otorhinolaryngology,Union Hospital,Tongji Medical College,Huazhong University of Science and Technology,Wuhan,430022,China [2]Institute of Otorhinolaryngology,Union Hospital,Tongji Medical College,Huazhong University of Science and Technology,Wuhan,430022,China [3]Key Laboratory of Neurological Disorders of Education Ministry,Tongji Medical College,Huazhong University of Science and Technology,Wuhan,430022,China

出　　处：《Current Medical Science》2020年第3期455-462,共8页当代医学科学（英文）

基　　金：The study was supported by the National Twelfth-Five Year Research Program of China(No.2012BAI12B02);the National Natural Science Foundation of China(No.81873701).

摘　　要：Benign paroxysmal positional vertigo(BPPV)represents the most common form of positional vertigo.It is caused by dislodged otoconia that freely float in the semicircular canals(canalolithiasis)or attach to the cupula(cupulolithiasis).A cupulolithiasis-type(or a heavy cupula-type)of BPPV implicating the lateral semicircular canal(LSCC)exhibits persistent ageotropic direction-changing positional nystagmus(DCPN)in a head-roll test.However,in some cases,unlike any type of BPPV,persistent geotropic DCPN cannot be explained by any mechanisms of BPPV,and don’t fit the current classifications.Recently,the notion of light cupula has been introduced to refer to the persistent geotropic DCPN.In this study,we looked at the clinical features of light cuplula and discussed the possible mechanisms and therapeutic strategies of the condition.The notion of light cupula is a helpful addition to the theory of peripheral positional vertigo and nystagmus.

关 键 词：positional vertigo direction-changing positional nystagmus light cupula head-roll test null plane lateral semicircular canal AMPULLA 

分 类 号：R76[医药卫生—耳鼻咽喉科]