Membrane Resonance in Pyramidal and GABAergic Neurons of the Mouse Perirhinal Cortex
| Autor: | Mauro Toselli, Francesca Talpo, Gerardo Biella, Antonio N Castagno, Yuchio Yanagawa, Noemi Binini, Niccolò Mattiello, Stefano Ramat, Sergio Masetto, Francesca Raffin, Paolo Spaiardi, Matteo Pedrazzoli, Claudia Maniezzi, Clayton T. Dickson |
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| Rok vydání: | 2021 |
| Předmět: |
0301 basic medicine
Hippocampus Neurosciences. Biological psychiatry. Neuropsychiatry membrane resonance Temporal lobe 03 medical and health sciences Cellular and Molecular Neuroscience 0302 clinical medicine Perirhinal cortex pyramidal neuron medicine Patch clamp Original Research Physics Neocortex perirhinal cortex patch-clamp Resting potential GABAergic interneuron 030104 developmental biology medicine.anatomical_structure nervous system GABAergic Neuron Neuroscience 030217 neurology & neurosurgery RC321-571 |
| Zdroj: | Frontiers in Cellular Neuroscience, Vol 15 (2021) Frontiers in Cellular Neuroscience |
| ISSN: | 1662-5102 |
| Popis: | The perirhinal cortex (PRC) is a polymodal associative region of the temporal lobe that works as a gateway between cortical areas and hippocampus. In recent years, an increasing interest arose in the role played by the PRC in learning and memory processes, such as object recognition memory, in contrast with certain forms of hippocampus-dependent spatial and episodic memory. The integrative properties of the PRC should provide all necessary resources to select and enhance the information to be propagated to and from the hippocampus. Among these properties, we explore in this paper the ability of the PRC neurons to amplify the output voltage to current input at selected frequencies, known as membrane resonance. Within cerebral circuits the resonance of a neuron operates as a filter toward inputs signals at certain frequencies to coordinate network activity in the brain by affecting the rate of neuronal firing and the precision of spike timing. Furthermore, the ability of the PRC neurons to resonate could have a fundamental role in generating subthreshold oscillations and in the selection of cortical inputs directed to the hippocampus. Here, performing whole-cell patch-clamp recordings from perirhinal pyramidal neurons and GABAergic interneurons of GAD67-GFP+ mice, we found, for the first time, that the majority of PRC neurons are resonant at their resting potential, with a resonance frequency of 0.5–1.5 Hz at 23°C and of 1.5–2.8 Hz at 36°C. In the presence of ZD7288 (blocker of HCN channels) resonance was abolished in both pyramidal neurons and interneurons, suggesting that Ih current is critically involved in resonance generation. Otherwise, application of TTx (voltage-dependent Na+ channel blocker) attenuates the resonance in pyramidal neurons but not in interneurons, suggesting that only in pyramidal neurons the persistent sodium current has an amplifying effect. These experimental results have also been confirmed by a computational model. From a functional point of view, the resonance in the PRC would affect the reverberating activity between neocortex and hippocampus, especially during slow wave sleep, and could be involved in the redistribution and strengthening of memory representation in cortical regions. |
| Databáze: | OpenAIRE |
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