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. Author manuscript; available in PMC: 2012 Feb 8.
Published in final edited form as: Conf Proc IEEE Eng Med Biol Soc. 2011 Aug;2011:2311–2314. doi: 10.1109/IEMBS.2011.6090581

Fig. 1.

Fig. 1

Ten randomly selected occurrences of the spike cluster 4 (left) and ten of the spike cluster 8 (right). The amplitude of the spikes is well above the noise level for cluster 4 while it is slightly above the noise level for cluster 8, resulting in a lower SNR.