Biophysical properties of subthreshold resonance oscillations and subthreshold membrane oscillations in neurons

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Abstract

Subthreshold-level activities in neurons play a crucial role in neuronal oscillations. These small-amplitude oscillations have been suggested to be involved in synaptic plasticity and in determining the frequency of network oscillations. Subthreshold membrane oscillations (STOs) and subthreshold resonance oscillations (SROs) are the main constituents of subthreshold-level activities in neurons. In this study, a general theoretical framework for analyzing the mechanisms underlying STOs and SROs in neurons is presented. Results showed that the resting membrane potential and the hyperpolarization-activated potassium channel (h-channel) affect the subthreshold-level activities in stellate cells. The contribution of h-channel on resonance is attributed to its large time constant, which produces the time lag between Ih and the membrane potential. Conversely, the persistent sodium channels (Nap-channels) only play an amplifying role in these neurons.

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V-Ghaffari, B., Kouhnavard, M., & Kitajima, T. (2016). Biophysical properties of subthreshold resonance oscillations and subthreshold membrane oscillations in neurons. Journal of Biological Systems, 24(4), 561–575. https://doi.org/10.1142/S0218339016500285

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