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External tufted
cells have intrinsic burst firing and they are contacted directly by
olfactory nerve (ON) terminals. They also fire in synchrony and contact
inhibitory interneurons, namely periglomerular (PG) and short axon cells
(SA), which in turn exhibit bursts of EPSPs. The PG cell dendrites ramify in
one single glomerulus and thus might serve for intraglomerular inhibition via
dendrodendritic interactions with ET tufted dendrites. In contrast, SA cell
have neurites extending throughout several glomeruli and thus might serve for
interglomerular inhibition.
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