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. Author manuscript; available in PMC: 2014 Aug 1.
Published in final edited form as: J Clin Neurophysiol. 2013 Aug;30(4):371–375. doi: 10.1097/WNP.0b013e31829de01c

Figure 2.

Figure 2

Example of false negative and positive CDSA images.

Left: False positive. An increase in power is seen periodically at beta frequencies (black oval). These periods corresponded to periods with diffuse beta activity and not electrographic seizures.

Right: False negative. A very slight increase in power is seen at theta-alpha frequencies. The electrographic seizure (black oval) slowly evolves and only reaches about 2–3 Hz. Therefore the seizure does not stand out well form the background on CDSA.