. Author manuscript; available in PMC: 2013 Aug 27.

Published in final edited form as: Clin Neurophysiol. 2011 Mar 22;122(9):1701–1705. doi: 10.1016/j.clinph.2011.02.022

Table 1.

Comparison of HFO characteristics with previous reports. Values in the current study (mean +/− standard deviation) compared to those in reported in a previous study (Bragin et al., 1999b) (range, mean in parentheses). The amplitude drop (imputable to the much larger size of clinical contacts compared to microelectrodes) is evident. Nonetheless the duration and frequency of the events were comparable to previous studies, suggesting that similar events were being recorded.

	Ripples		FRs
	Chatillon et al.	Bragin et al.	Chatillon et al.	Bragin et al.
Rate (event/min)	73.1 +/− 31.2	0.1–36 (6)	9.8 +/− 12.3	1–5 (1.6)
Duration (ms)	74.8 +/− 12.6	30–140 (73)	23.9 +/− 5.1	10–65 (28)
Peak frequency (Hz)	109.4 +/− 4.4	130–180 (148)	314.6 +/− 19.6	250–500 (357)
Amplitude (μV)	0.8 +/− 0.8	500–2500 (1100)	1.3 +/− 0.8	200–1500 (720)