Transient dynamics and rhythm coordination of inferior olive spatio-temporal patterns
The inferior olive (IO) is a neural network belonging to the olivo-cerebellar system whose neurons are coupled with electrical synapses and display subthreshold oscillations and spiking activity. The IO generates complex spatio-temporal patterns. The generation and modulation of coherent spiking act...
Main Authors: | , , , |
---|---|
Format: | Article |
Language: | English |
Published: |
Frontiers Media S.A.
2013-09-01
|
Series: | Frontiers in Neural Circuits |
Subjects: | |
Online Access: | http://journal.frontiersin.org/Journal/10.3389/fncir.2013.00138/full |
id |
doaj-883f8ff125d24f1a8b263c456f1cccb0 |
---|---|
record_format |
Article |
spelling |
doaj-883f8ff125d24f1a8b263c456f1cccb02020-11-24T23:13:41ZengFrontiers Media S.A.Frontiers in Neural Circuits1662-51102013-09-01710.3389/fncir.2013.0013858049Transient dynamics and rhythm coordination of inferior olive spatio-temporal patternsRoberto eLatorre0Carlos eAguirre1Mikhail I. Rabinovich2Pablo eVarona3Escuela Politécnica Superior, Universidad Autónoma de MadridEscuela Politécnica Superior, Universidad Autónoma de MadridUniversity of California San DiegoEscuela Politécnica Superior, Universidad Autónoma de MadridThe inferior olive (IO) is a neural network belonging to the olivo-cerebellar system whose neurons are coupled with electrical synapses and display subthreshold oscillations and spiking activity. The IO generates complex spatio-temporal patterns. The generation and modulation of coherent spiking activity in the IO is one key issue in cerebellar research. In this work, we build a large scale IO network model of electrically coupled conductance-based neurons to study the emerging spatio-temporal patterns of its transient neuronal activity. The main factors studied governing the collective dynamics of the IO network were: the degree of electrical coupling, the extent of the electrotonic connections, the presence of stimuli or regions with different excitability levels and the modulatory effect of an inhibitory loop. The spatio-temporal patterns were analyzed using a discrete wavelet transform to provide a quantitative characterization. Our results show that the electrotonic coupling produces quasi-synchronized subthreshold oscillations over a wide dynamical range. The synchronized oscillatory activity plays the role of a timer for a coordinated representation of spiking rhythms with different frequencies. The encoding and coexistence of several coordinated rhythms is related to the different clusterization and coherence of transient spatio-temporal patterns in the network, where the spiking activity is commensurate with the quasi-synchronized subthreshold oscillations. In the presence of stimuli, different rhythms are encoded in the spiking activity of IO neurons that nevertheless remains constrained to a commensurate value of the subthreshold frequency. The stimuli induced spatio-temporal patterns can reverberate for long periods, which contributes to the computational properties of the IO. We also show that the presence of regions with different excitability levels creates sinks and sources of coordinated activity which shape the propagation of spike wave fronts.http://journal.frontiersin.org/Journal/10.3389/fncir.2013.00138/fullelectrical couplingsubthreshold oscillationsspike wave frontsmultifunctional neural networkscerebellar researchsink-source phenomena |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Roberto eLatorre Carlos eAguirre Mikhail I. Rabinovich Pablo eVarona |
spellingShingle |
Roberto eLatorre Carlos eAguirre Mikhail I. Rabinovich Pablo eVarona Transient dynamics and rhythm coordination of inferior olive spatio-temporal patterns Frontiers in Neural Circuits electrical coupling subthreshold oscillations spike wave fronts multifunctional neural networks cerebellar research sink-source phenomena |
author_facet |
Roberto eLatorre Carlos eAguirre Mikhail I. Rabinovich Pablo eVarona |
author_sort |
Roberto eLatorre |
title |
Transient dynamics and rhythm coordination of inferior olive spatio-temporal patterns |
title_short |
Transient dynamics and rhythm coordination of inferior olive spatio-temporal patterns |
title_full |
Transient dynamics and rhythm coordination of inferior olive spatio-temporal patterns |
title_fullStr |
Transient dynamics and rhythm coordination of inferior olive spatio-temporal patterns |
title_full_unstemmed |
Transient dynamics and rhythm coordination of inferior olive spatio-temporal patterns |
title_sort |
transient dynamics and rhythm coordination of inferior olive spatio-temporal patterns |
publisher |
Frontiers Media S.A. |
series |
Frontiers in Neural Circuits |
issn |
1662-5110 |
publishDate |
2013-09-01 |
description |
The inferior olive (IO) is a neural network belonging to the olivo-cerebellar system whose neurons are coupled with electrical synapses and display subthreshold oscillations and spiking activity. The IO generates complex spatio-temporal patterns. The generation and modulation of coherent spiking activity in the IO is one key issue in cerebellar research. In this work, we build a large scale IO network model of electrically coupled conductance-based neurons to study the emerging spatio-temporal patterns of its transient neuronal activity. The main factors studied governing the collective dynamics of the IO network were: the degree of electrical coupling, the extent of the electrotonic connections, the presence of stimuli or regions with different excitability levels and the modulatory effect of an inhibitory loop. The spatio-temporal patterns were analyzed using a discrete wavelet transform to provide a quantitative characterization. Our results show that the electrotonic coupling produces quasi-synchronized subthreshold oscillations over a wide dynamical range. The synchronized oscillatory activity plays the role of a timer for a coordinated representation of spiking rhythms with different frequencies. The encoding and coexistence of several coordinated rhythms is related to the different clusterization and coherence of transient spatio-temporal patterns in the network, where the spiking activity is commensurate with the quasi-synchronized subthreshold oscillations. In the presence of stimuli, different rhythms are encoded in the spiking activity of IO neurons that nevertheless remains constrained to a commensurate value of the subthreshold frequency. The stimuli induced spatio-temporal patterns can reverberate for long periods, which contributes to the computational properties of the IO. We also show that the presence of regions with different excitability levels creates sinks and sources of coordinated activity which shape the propagation of spike wave fronts. |
topic |
electrical coupling subthreshold oscillations spike wave fronts multifunctional neural networks cerebellar research sink-source phenomena |
url |
http://journal.frontiersin.org/Journal/10.3389/fncir.2013.00138/full |
work_keys_str_mv |
AT robertoelatorre transientdynamicsandrhythmcoordinationofinferiorolivespatiotemporalpatterns AT carloseaguirre transientdynamicsandrhythmcoordinationofinferiorolivespatiotemporalpatterns AT mikhailirabinovich transientdynamicsandrhythmcoordinationofinferiorolivespatiotemporalpatterns AT pabloevarona transientdynamicsandrhythmcoordinationofinferiorolivespatiotemporalpatterns |
_version_ |
1725597171887112192 |