Figure 5. The percentage of REM sleep associated with periods of tonic and phasic GG activity.
Group data showing the changes in tonic and phasic GG activities in REM sleep with bicuculline (BIC) and ACSF at the hypoglossal motor nucleus compared to neck muscle activity during room-air and CO2-stimulated breathing. The percentage of REM sleep accompanied by phasic bursts of GG activity was decreased by bicuculline compared to ACSF. No other changes were statistically significant. See text for further details. Abbreviations are as for Fig. 3.