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A model of cooperative effect of AMPA and NMDA receptors in glutamatergic synapses.
Cognitive Neurodynamics 2016 August
Glutamatergic synapses play a pivotal role in brain excitation. The synaptic response is mediated by the activity of two receptor types (AMPA and NMDA). In the present paper we propose a model of glutamatergic synaptic activity where the fast current generated by the AMPA conductance produces a local depolarization which activates the voltage- and [Mg(2+)]-dependent NMDA conductance. This cooperative effect is dependent on the biophysical properties of the synaptic spine which can be considered a high input resistance specialized compartment. Herein we present results of simulations where different values of the spine resistance and of the Mg(2+) concentrations determine different levels of cooperativeness between AMPA and NMDA receptors in shaping the post-synaptic response.
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