FAST-WAVE PERIODIC COMPLEXES IN A MENTALLY-RETARDED CHILD WHO LATER DEVELOPED SUBACUTE SCLEROSING PANENCEPHALITIS - A MODIFICATION OF A CLASSIC EEG BY PREEXISTING BRAIN-DAMAGE
Sk. Narayan et al., FAST-WAVE PERIODIC COMPLEXES IN A MENTALLY-RETARDED CHILD WHO LATER DEVELOPED SUBACUTE SCLEROSING PANENCEPHALITIS - A MODIFICATION OF A CLASSIC EEG BY PREEXISTING BRAIN-DAMAGE, Developmental Medicine and Child Neurology, 39(11), 1997, pp. 766-769
The EEG of a 12-year-old girl with stage II subacute sclerosing panenc
ephalitis (SSPE), who had also suffered from a non-progressive mental
retardation of unknown aetiology since early childhood, revealed perio
dic generalised stereotyped fast wave bursts synchronous with myocloni
c jerks, The background activity was nearly normal, The diagnosis of S
SPE was established by raised serum and measles antibody titres, raise
d CSF IgG, and brain biopsy, This rare type of periodic complex has on
ly once been described in the literature, again in a mentally retarded
child who had developed SSPE, We suggest a mechanism of origin of thi
s type of periodic complex drawn from observations in these two cases,
anti discuss its significance.