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Thalamic reticular cells firing modes and its dependency on the frequency and amplitude ranges of the current stimulus

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Abstract

The neurons of the Thalamic Reticular Nucleus (TRNn) respond to inputs in two activity modes called burst and tonic firing and both can be observed in different physiological states. The functional states of the thalamus depend in part on the properties of synaptic transmission between the TRNn and the thalamocortical and corticothalamic neurons. A dendrite can receive inhibitory and excitatory postsynaptic potentials. The novelties presented in this paper can be summarized as follows: First, it shows, through a computational simulation, that the burst and tonic firings observed in the TRNn soma could be explained as a product of random synaptic inputs on the distal dendrites, the tonic firings are generated by random excitatory stimuli, and the burst firings are generated by two different types of stimuli: inhibitory random stimuli, and a combination of inhibitory (from TRNn) and excitatory (from corticothalamic and thalamocortical neurons) random stimuli; second, according to in vivo recordings, we have found that the burst observed in the TRNn soma has graduate properties that are proportional to the stimuli frequency; and third, a novel method for showing in a quantitative manner the accelerando-decelerando pattern is proposed.

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Authors and Affiliations

  1. Departamento de Qumica y Biologa, Universidad del Norte, Barranquilla, Colombia

    Oscar Hernandez

  2. Universidad del Norte, Barranquilla, Colombia

    Lilibeth Hernandez & David Vera

  3. Departamento de Ingenieria de Sistemas, Universidad del Norte, Barranquilla, Colombia

    Eduardo Zurek

  4. Departamento de Ingenieria Industrial, Universidad del Norte, Barranquilla, Colombia

    Alcides Santander

Authors
  1. Oscar Hernandez
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  2. Lilibeth Hernandez
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  3. David Vera
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  4. Alcides Santander
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  5. Eduardo Zurek
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Correspondence to Oscar Hernandez.

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Hernandez, O., Hernandez, L., Vera, D. et al. Thalamic reticular cells firing modes and its dependency on the frequency and amplitude ranges of the current stimulus. Med Biol Eng Comput 53, 37–44 (2015). https://doi.org/10.1007/s11517-014-1209-z

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  • DOI: https://doi.org/10.1007/s11517-014-1209-z

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