正常人下肢肌姿势诱发反射检测及影响因素  

Posture Evoked Response Detecting in Normal Lower Limb Muscle and Its Influencing Factors

作　　者：程冬梅[1,2] 周晓蓉[2] 范利华[2] 杨小萍[2] 陈芳[2] 

机构地区：[1]苏州大学医学部法医学系,江苏苏州215123 [2]司法部司法鉴定科学技术研究所上海市法医学重点实验室,上海200063

出　　处：《法医学杂志》2014年第2期88-92,共5页Journal of Forensic Medicine

基　　金："十二五"国家科技支撑计划项目(2012BAK16B03);上海市法医学重点实验室资助项目(13DZ2271500)

摘　　要：目的分析不同刺激方式下,正常人下肢肌姿势诱发反射的潜伏期及影响因素。方法利用动态平衡仪支持面旋转刺激(Toes-up和Toes-down)和水平移动刺激(Forward和Backward)诱导正常人下肢产生姿势反射,用表面肌电仪在胫前肌及腓肠肌记录肌电的潜伏期,分析不同刺激方式下,左右侧别的差异,以及性别、身高对潜伏期的影响。结果 (1)在Toes-up和Backward刺激下,胫前肌潜伏期长于腓肠肌;在Toes-down和Forward刺激方式下,腓肠肌潜伏期长于胫前肌。(2)左右肢的潜伏期差异无统计学意义。(3)男性的潜伏期多较女性长。(4)随着身高的增加,潜伏期逐渐延长。结论不同刺激方式、性别及身高均对下肢肌姿势诱发反射的潜伏期有影响,然而在同一个体,可不考虑身高及性别的影响。Objective To analyze the latency of posture evoked response of normal lower limb muscle in different stimulations and explore its influencing factors. Methods The normal lower limb was induced to produce postural evoked response by the dynamic posturography through two kinds of perturbations, the supporting surface rotation stimulation （Toes-up and Toes-down） and the horizontal perturbation stimulation （Forward and Backward）. The latencies of tibialis anterior muscle and gastrocnemius muscle were recorded by surface electromyography acquisition system. The differences of the left and right limb, gen-der and height on the latency of postural evoked response were analyzed. Results （1） Under the Toes-up and Backward perturbation, the latency of tibialis anterior muscle was longer than gastrocnemius muscle;under the Toes-down and Forward perturbation, the latency of gastrocnemius muscle was longer than tib-ialis anterior muscle. （2） The latencies of left limb and right limb had no significant difference. （3） The la-tency in male was longer than that in female. （4） The latency gradually increased with the increase of height. Conclusion In the postural evoked response, different perturbations, gender and height have sig-nificant impacts on the latency of posture evoked response of lower limb muscle. However, the effect of height and gender should be not considered referring to the same individual.

关 键 词：法医学 诱发电位 肌 骨骼 动态姿势图 

分 类 号：DF795.1[医药卫生—法医学]