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External tufted cells have intrinsic rhythmic bursting at theta frequencies and are
driven monosynaptically by ON inputs.
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Short axon and periglomerular cells receive bursts of EPSPs from external
tufted cells.
-Glomerular
neurons whose dendrites ramify in the same glomerulus exhibit
synchronous events (membrane potential oscillations, bursts of spikes, bursts of
EPSP/Cs, single
EPSP/Cs).
-Synchronous
activity occurs near theta frequencies, which predominate the rates of
investigative sniffing in rodents, and may play an important role in olfactory coding.