Abstract
Gamma band activity in the cortical EEG reflects the recurrent membrane oscillations of large assemblies of neurons. The cellular mechanisms for the generation of gamma band oscillations in RAS neurons are the same as those found to generate gamma band oscillations in the cortex, thalamus, hippocampus, and cerebellum. Gamma band activity across cortical and subcortical regions is coherent. The maintenance of gamma band activity in the RAS is dependent on G proteins, and gamma band activity during waking appears to use different intracellular pathways compared to gamma band activity expressed during REM sleep. These results suggest that pharmacological interventions can modulate the two high-frequency states differentially.
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