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. 2013 Jul 1;30(13):1147–1160. doi: 10.1089/neu.2012.2652

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Copyright 2013, Mary Ann Liebert, Inc.

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FIG. 3. — Representative pressure traces for five exposure groups (A). The signal was smoothed using Fast Fourier Transformation (FFT) band pass filter for the clarity of presentation. (B) Schematic representation of peak-trough analysis on overpressure recorded by brain sensor: Δ_pt is a sum of the first two peak-to-peak amplitudes. Results of peak-trough analysis: (C) Lethal groups (190, 250 and 290 kPa) have significantly higher Δ_pt (p<0.05) compared with non-lethal groups (130 and 230 kPa). There are no statistically significant differences between Δ_pt in respective non-lethal and lethal groups (p>0.05, marked with ampersand). (D) FFT analysis of the intracranial pressure profiles recorded by the sensor implanted in the brain. The high frequency component (peaks marked with arrows, >10 kHz) is present in the signal of lethal groups (190, 250, and 290 kPa).