[Visual evoked potentials in XXXX ].

@entity1 @entity227 @entity15 @entity7995
A study was carried out of 32 @entity1 suffering from @entity15 the diagnois of which was quite definite according to Mac Alpine's criteria and which had developed over more than two years. Comparison was made with @entity1 suffering from @entity7995 of a different aetiology and with normal subjects. The method of investigation was dynamic electroretinoencephalography : the @entity227 were investigated after stimulation by white and coloured light before and after adapatation to darkness. The specificity of the results was tested by, firstly, electro-retinogram recording for control of the visual system, and secondly, by the recording of auditory evoked potentials for control cerebral function. Abnormalities in @entity227 were found in 77 percent of the cases. In particular, there was delayed latency, that is, a slowing of retino-cortical conduction. The significance of these abnormalities is discussed, by analyzing the electroclinical correlationships according to whether there was obvious or subclinical @entity7995 , and the dissemination, activity or duration of the disease. The incidence of @entity227 was considerably greater than that in @entity7995 (35 percent). The links between abnormalities in nervous conduction and demyelinisation are emphasized. The role and specificity of electrophysiological investigation in diagnosis of @entity15 are discussed.
