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. Author manuscript; available in PMC: 2009 Sep 22.
Published in final edited form as: Neuron. 2009 Jun 11;62(5):612–632. doi: 10.1016/j.neuron.2009.05.015

Figure 5.

Figure 5

Electrophysiological recordings of ripple and fast ripple activity. A. Ripple oscillation recorded by Buzsaki et al. (1992) in area CA1 of rat hippocampus. The 3 traces correspond to the same recording filtered with 3 different settings. The 200 Hz oscillation is clearly observed when the signal is bandpass filtered between 100 and 400 Hz (bottom trace). B. Ripple (1) and fast ripple (2) oscillations recorded by Staba et al. (2007) with microelectrodes placed in the hippocampus of a human patient with MTLE. Shown are unfiltered (B2a) and bandpass filtered (B2b, filter = 70-600 Hz) fast ripple oscillations. C. Ripple (1) and fast ripple (2) oscillations recorded by Foffani et al. (2007) in hippocampal brain slices of control (1) and epileptic (2) rat. Figure credits. Part A from Buzsaki et al. (1992). Reprinted with permission from AAAS. Part B from Staba et al. (2007) with permission from Wiley. Part C from Foffani et al. (2007) with permission from Elsevier. Original figures were slightly modified.