velocity and absolute shortening range are. Thus,the ideal choice toreplace adisfunctional muscle isthemuscle which the physiological cross—sectional area and muscle fiberlength and otherparameters of muscle architecture ale similarto thatofthedysfunctional muscle inthe event of absence of amuscle and requiring othermuscle transposition or graft.However, midfacial areashave fewer researchers inthepast,focusing on themimeticmuscle morphology position,innervation,motor endplate distribution, while themuscle architectureis not yet indepth study.So itisneed to research recipient sitein thelongstanding facialparalysis surgery in ordertoselecting and transfering adonor muscle accurately. Objective and Clinic Significance The aim of OUr study isexploring themuscle architecture characteristicsof V
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