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Figure 2. EEG recording performed at age 3.5 months, after
a series of apparently unprovoked generalised tonic-clonic seizures. a.
Left: during sleep, the presence of diffuse paroxysmal abnormalities.
Note that the spikes predominate over the central and anterior leads,
and on the right. b. Right: an apparently spontaneous ictal event
on the same EEG recording, on waking. Note the right-central and vertex
predominance of the paroxysmal changes. The paroxysmal complex was followed
by low-voltage activity, more visible over the vertex and the left-central
area. The clinical correlate was classified as a spasm, but remained isolated,
and when the patient was seen at age 19, the parents certified that these
had been the same "jerks" as in later life.
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