Diagnostic value of orbicularis oculi muscle electromyography in functional epiphora  

作　　者：Hui Lu Pei-Dong Liu Xue Yao Zuo-Fen Wang Li-Fen Gao Shao-Peng Wang 

机构地区：[1]Department of Ophthalmology,Zibo Central Hospital,Zibo 255000,Shandong Province,China [2]Department of Electromyography,Zibo Central Hospital,Zibo 255000,Shandong Province,China

出　　处：《World Journal of Clinical Cases》2020年第14期3000-3005,共6页世界临床病例杂志

摘　　要：BACKGROUND Functional epiphora is a clinical condition which is not due to an anatomic defect.Most studies agree that it involves the action of the orbicularis oculi muscle,particularly its deeper segment(Horner’s muscle),but the exact mechanism is not clear.AIM To evaluate the orbicularis oculi muscle in functional epiphora patients using electromyography(EMG).METHODS A total of 8 Chinese patients(16 eyes)with functional epiphora were enrolled in this study,and ten volunteers(10 eyes)were included as normal controls.Five epiphora patients(five eyes)with facial palsy served as positive controls.Quantitative EMG was performed in the deeper segment of orbicularis oculi muscle.The average duration of each EMG waveform was measured.RESULTS The average duration of EMG waveforms in the normal control group,the functional epiphora group,and the facial palsy group were 6.39±0.73 ms,9.39±1.32 ms and 11.2±1.42 ms,respectively.The duration of EMG waveforms was significantly longer in the functional epiphora group than in the normal control group(P<0.05),and shorter than that in the facial palsy group(P<0.05).CONCLUSION These data indicate the presence of neurogenic orbicularis oculi muscle damage in epiphora patients,which may be the cause of functional epiphora.The etiology of neurogenic damage in the orbicularis oculi muscle requires further investigation.

关 键 词：Functional epiphora ELECTROMYOGRAPHY Orbicularis oculi muscle Neurological damage ETIOLOGY TREATMENT 

分 类 号：R742.1[医药卫生—神经病学与精神病学] R777.4[医药卫生—临床医学]