[Different clinical and electroencephalographic aspects of subacute sclerosing panencephalitis (SSPE). Apropos of 51 cases]. / Différents aspects cliniques et électro-encéphalographiques de la panencéphalite sclérosante subaiguë (PESS). A propos de 51 cas.

The authors have studied 51 cases of SSPE, mainly focusing their attention upon clinical and EEG signs of the onset of the illness. Clinical disorders have been classified in the 3 following categories: psychic prevailing, neurologic prevailing, and visual disorders prevailing. These 3 categories do not have the same evolution and may not have the same prognosis. Concerning EEG disorders, the typical periodic complex topography allows to recognize 3 groups: bilateral and symmetrical complexes, bilateral but asymmetrical complexes, and unilateral complexes. These 3 groups may be further analysed, according to an anterior or posterior prevalence of the periodic complex. The authors think that this distinction may be of interest for diagnostic precision.