Olfactory Bulb Field Potentials and Respiration in Sleep-Wake States of Mice

Figure 5

During REM sleep only plethysmography reliably indicates respiration for low and high breathing frequencies. Respiration-entrained local field potentials in olfactory bulb appeared mostly at low breathing frequencies. Thermocouple signal did not contain any respiration-related information. (a) Raw signals of plethysmography (PG), thermosensor (TS), and local field potential of the olfactory bulb (OB). (b) Time-frequency distribution. (c) Power spectral density of the time segments marked in (a). (d) -scored averages of peak power (± SEM) of PG (red; ; ; Friedman’s test) and the LFP in OB (black; ; ; Friedman’s test). (e) Coherence between PG and OB decreased with increasing breathing frequency (; ; Friedman’s test).