Artículo
Bursting Neurons in the Hippocampal Formation Encode Features of LFP Rhythms
Constantinou, Maria; Gonzalo Cogno, Ximena Soledad
; Elijah, Daniel H.; Kropff, Emilio
; Gigg, John; Samengo, Ines
; Montemurro, Marcelo A.
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Fecha de publicación:
12/2016
Editorial:
Frontiers Research Foundation
Revista:
Frontiers in Computational Neuroscience
ISSN:
1662-5188
e-ISSN:
1662-5188
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Burst spike patterns are common in regions of the hippocampal formation such as the subiculum and medial entorhinal cortex (MEC). Neurons in these areas are immersed in extracellular electrical potential fluctuations often recorded as the local field potential (LFP). LFP rhythms within different frequency bands are linked to different behavioral states. For example, delta rhythms are often associated with slow-wave sleep, inactivity and anesthesia; whereas theta rhythms are prominent during awake exploratory behavior and REM sleep. Recent evidence suggests that bursting neurons in the hippocampal formation can encode LFP features. We explored this hypothesis using a two-compartment model of a bursting pyramidal neuron driven by time-varying input signals containing spectral peaks at either delta or theta rhythms. The model predicted a neural code in which bursts represented the instantaneous value, phase, slope and amplitude of the driving signal both in their timing and size (spike number). To verify whether this code is employed in vivo, we examined electrophysiological recordings from the subiculum of anesthetized rats and the MEC of a behaving rat containing prevalent delta or theta rhythms, respectively. In both areas, we found bursting cells that encoded information about the instantaneous voltage, phase, slope and/or amplitude of the dominant LFP rhythm with essentially the same neural code as the simulated neurons. A fraction of the cells encoded part of the information in burst size, in agreement with model predictions. These results provide in-vivo evidence that the output of bursting neurons in the mammalian brain is tuned to features of the LFP.
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Articulos(IIBBA)
Articulos de INST.DE INVEST.BIOQUIMICAS DE BS.AS(I)
Articulos de INST.DE INVEST.BIOQUIMICAS DE BS.AS(I)
Citación
Constantinou, Maria; Gonzalo Cogno, Ximena Soledad; Elijah, Daniel H.; Kropff, Emilio; Gigg, John; et al.; Bursting Neurons in the Hippocampal Formation Encode Features of LFP Rhythms; Frontiers Research Foundation; Frontiers in Computational Neuroscience; 10; 12-2016; 1-18
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