Figure 1.

Examples of olfactory bulb LFPs recorded before and during a 2 s presentation of isoamyl acetate (150 ppm dilution). A, Raw signal recorded from the olfactory bulb of a 7-d-old and a mature rat, respectively. The horizontal bar indicates odor presentation. B, Power spectra for the odor-evoked oscillations taken from LFP examples above. Note that the majority of odor-evoked activity in the P7 rat is in the lower frequency ranges with a minimal β band (15-40Hz) response and no γ band (40-75Hz) activity compared with the mature rat analysis showing a relatively large increase in both β and γ band odor-evoked activity.