Extended Interneuronal Network of the Dentate Gyrus

Extended Interneuronal Network of the Dentate Gyrus

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Local interneurons control principal cells within individual brain areas, but anecdotal observations indicate that interneuronal axons sometimes extend beyond strict anatomical boundaries.Here, we use the case of the dentate gyrus mega motion lc100 (DG) to show that boundary-crossing interneurons with cell bodies in CA3 and CA1 ferrofish a32pro constitute a numerically significant and diverse population that relays patterns of activity generated within the CA regions back to granule cells.These results reveal the existence of a sophisticated retrograde GABAergic circuit that fundamentally extends the canonical interneuronal network.