1. A brief electrical event of 3 to 25 msec that gives the appearance in the electroencephalogram of a rising and falling vertical line. 2. In electrophoresis, a sharply angled upward deflection on a densitometric tracing.
ponto-geniculo-occipital s.EEG spikes during REM sleep that arise in the pons and pass to the lateral geniculate body and occipital cortex.
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