牵拉增加肌梭传入放电的实验观察  

Stretch Activate Afferent Discharge of Muscle Spindle

作　　者：刘国霞[1] 田志兰[1] 马国英[1] 李加善[1] 李晨旭[1] 

机构地区：[1]山西大同大学医学院,山西大同037009

出　　处：《山西大同大学学报（自然科学版）》2011年第1期61-63,共3页Journal of Shanxi Datong University(Natural Science Edition)

摘　　要：目的观察牵拉刺激(刺激强度)及其它实验因素对肌梭放电频率的影响。方法制备蟾蜍离体坐骨神经-缝匠肌标本,用BL-420生物机能系统记录牵拉刺激及实验因素对肌梭传入放电活动的影响。结果牵拉刺激增强,肌梭的传入放电频率增加;牵拉力度相同时,快速牵拉较缓慢牵拉引发更多的肌梭放电。结论肌梭是肌肉长度感受器,有快适应和慢适应两种现象,其敏感性受肌肉长度及温度的影响。Objective To observe the effect of stretch and experimental factors on afferent discharge frequency of muscle spindle.Methods By BL-420 biology function recording system,the afferent discharge of isolated toad sartorial muscle spindle was recorded,and the effect of experimental factors on the discharge of muscle spindle was also observed.Results along with stretch intensity increasing,the discharge frequency of spindle increase.At same stretch intensity,fast stretch elicits more nerve impulse than slow stretch.Conclusions Muscle spindle is length sensor of muscle,exist fast adapt and slow adapt phenomena.Its sensitivity is affected by muscle length and temperature.

关 键 词：肌梭 传入放电 牵拉 

分 类 号：R338[医药卫生—人体生理学]