Publications by authors named "Isabel Barriuso-Ortega"

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Two septal-entorhinal GABAergic projections differentially control coding properties of spatially tuned neurons in the medial entorhinal cortex.

Cell Rep 2021 03;34(9):108801

Department of Clinical Neurobiology at the Medical Faculty of Heidelberg University and German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120 Heidelberg, Germany. Electronic address:

Septal parvalbumin-expressing (PV) and calbindin-expressing (CB) projections inhibit low-threshold and fast-spiking interneurons, respectively, in the medial entorhinal cortex (MEC). We investigate how the two inputs control neuronal activity in the MEC in freely moving mice. Stimulation of PV and CB terminals causes disinhibition of spatially tuned MEC neurons, but exerts differential effects on temporal coding and burst firing. Thus, recruitment of PV projections disrupts theta-rhythmic firing of MEC neurons, while stimulation of CB projections increases burst firing of grid cells and enhances phase precession in a cell-type-specific manner. Inactivation of septal PV or CB neurons differentially affects context, reference, and working memory. Together, our results reveal how specific connectivity of septal GABAergic projections with MEC interneurons translates into differential modulation of MEC neuronal coding.
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http://dx.doi.org/10.1016/j.celrep.2021.108801DOI Listing
March 2021
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