1/ #tweeprint time! If you are interested in #interneurons, #hippocampus and developmental mechanisms of neural circuit function, check out our new preprint “Hippocampal hub neurons maintain unique functional properties throughout their lifetime”https://www.biorxiv.org/content/10.1101/813923v1 …
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9/ Mapping ebGABAs' inputs with electrical or optogenetic stimulations, we found that these cells, unlike random GABA cells, receive little excitation by extra-hippocampal inputs. Instead, they are mostly recruited by intra-hippocampal ones.pic.twitter.com/tHQ5koDJW7
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10/ What about inhibition? Do ebGABAs show distinct inhibitory wiring? Indeed, we show that compared to random GABA cells they receive weak local inhibition (with very little inputs from PV+ neurons). Instead, they are mostly inhibited by long-range inputs from the medial septum.pic.twitter.com/gqG0JAqw8c
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11/ Finally, we imaged ebGABAs in vivo and found that these cells are among a minority of cells in the network that are activated by a variety of network states.pic.twitter.com/VSaYwbggKB
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12/ In summary, our study indicates that early-born hub cells could be a distributed feature of cortical circuits. In adulthood, these cells remain anatomically and functionally distinct from other GABA cells, speaking in favour of a predetermined program for their hub function.
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13/ Based on their unique wiring schemes, ebGABAs could exert a long-range hub function in adulthood, reading the activity of local cells and synchronizing them to other structures.
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