Neural Comput - Intracellular dynamics of virtual place cells.

Tópicos

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Resumo

The pattern of spikes recorded from place cells in the rodent hippocampus is strongly modulated by both the spatial location in the environment and the theta rhythm. The phases of the spikes in the theta cycle advance during movement through the place field. Recently intracellular recordings from hippocampal neurons (Harvey, Collman, Dombeck, & Tank, 2009 ) showed an increase in the amplitude of membrane potential oscillations inside the place field, which was interpreted as evidence that an intracellular mechanism caused phase precession. Here we show that an existing network model of the hippocampus (Tsodyks, Skaggs, Sejnowski, & McNaughton, 1996 ) can equally reproduce this and other aspects of the intracellular recordings, which suggests that new experiments are needed to distinguish the contributions of intracellular and network mechanisms to phase precession.

Resumo Limpo

pattern spike record place cell rodent hippocampus strong modul spatial locat environ theta rhythm phase spike theta cycl advanc movement place field recent intracellular record hippocamp neuron harvey collman dombeck tank show increas amplitud membran potenti oscil insid place field interpret evid intracellular mechan caus phase precess show exist network model hippocampus tsodyk skagg sejnowski mcnaughton can equal reproduc aspect intracellular record suggest new experi need distinguish contribut intracellular network mechan phase precess

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