[Electrophysiological study on lumbosacral compression XXXX ].

@entity1 @entity17622 @entity51 @entity158 @entity614
Using an electrophysiological approach, a functional diagnosis was attempted to evaluate lumbosacral compression @entity614 . The cauda equina action potential (root- @entity17622 ) and the somatosensory evoked potential (root-SEP) were measured by stimulating a single nerve root. The mixed nerve root action potential (MRAP) and the @entity17622 ( @entity17622 ) were recorded by stimulating a peripheral nerve. When a root was stimulated, reproduction of @entity158 was also investigated. Seventy-four @entity1 with lumbago and sciatica were examined. Nerve roots involved with neurological signs showed some abnormal conductivity in the order of @entity17622 , MRAP, root-SEP and root- @entity17622 . Subclinical involvement was also observed. It seems to be that the relationship between neurological signs and classification of root-SEP and root- @entity17622 are rather close. @entity158 was reproduced by stimulating the root in all cases of disc herniations irrespective of the @entity51 . The above mentioned electrophysiological tests make it possible to identify and judge the extent of root involvement.
