对大白鼠F波性质的初步研究  

The effect of spinal nerve injury on F wave

作　　者：耿志国[1] 刘伟蓬 周继斌[1] 

机构地区：[1]三峡大学医学院,宜昌443003 [2]湖北宜昌市第一医院肌电图室

出　　处：《中华物理医学与康复杂志》2002年第9期541-543,共3页Chinese Journal of Physical Medicine and Rehabilitation

摘　　要：目的　探讨脊髓后根损伤对F波的影响。方法　 15只Wistar大鼠于窝下游离并刺激坐骨神经 ,在短展肌记录M波与F波 ;将大鼠分为 2组 ,暴露腰脊髓后 ,一组依次切断L3 、L4、L5、L6前根 ;另一组依次切断L3 、L4、L5、L6后根 ,分别观察记录切断前、后根后F波的波幅和潜伏期。结果　切断前根组均表现为F波波幅显著降低 (P <0 .0 1)直至消失 ;切断后根组均表现为F波波幅显著降低 (0 .0 0 1<P <0 .0 1) ,但F波不消失。结论　脊髓后根可能参与了F波的形成 ,或F波可能有反射成份。Objective To explore the effect of spinal nerve injury on changes of F wave. Methods Fifteen Wi star rats were divided into 2 groups. After surgical exposure of the lumbar spin al nerves of these animals, the ventral roots (L 3～6 ) were cut sequentiall y in 8 rats (Group A) and the dorsal roots were cut in another 7 rats (Group B). Both the latency and amplitude of F wave evoked by electric stimulation of sciat ic nerve, were recorded and compared before and after the injury. Results Rhizotomy of the ventral roots resulted in significant dec rease of amplitude or even disappearance of F waves ( P <0.01), while rhizotom y of the dorsal roots did not cause disappearance of F waves, although a signifi cant decrease of amplitude of the F waves was detected (0.001< P < 0.01 ). Conclusion The dorsal roots of spinal nerve may be inv olved in the production of F wave. Further study is needed to explore if a refle x component is also involved.

关 键 词：F波 脊髓损伤 动物实验 

分 类 号：R741.02[医药卫生—神经病学与精神病学]