Electrical coupling regulated by GABAergic nucleo-olivary afferent fibres facilitates cerebellar sensory-motor sensory–motor adaptation

Autor: Luque, Niceto, Naveros, Francisco, Abadía, Ignacio, Ros, Eduardo, Arleo, Angelo
Přispěvatelé: ARLEO, Angelo, Universidad de Granada = University of Granada (UGR), Institut de la Vision, Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)
Jazyk: angličtina
Rok vydání: 2022
Předmět:
Zdroj: Neural Networks
Neural Networks, 2022, 155, pp.422-438. ⟨10.1016/j.neunet.2022.08.020⟩
ISSN: 0893-6080
DOI: 10.1016/j.neunet.2023.05.055
Popis: This work was funded by the EU to FN NEUSEQBOT [91774] and to Human Brain Project Specific Grant Agreement 3 to ER [H2020-RIA. 945539]. The Andalusian Regional Government (Spain) and EU to ER CEREBIO [P18-FR-2378] and to NRL [A-TIC-276-UGR18]. The Spanish Ministry of Science and Innovation to NRL SPIKEAGE [MICINN-PID2020-113422G A-I00] ref [MCIN/ AEI/10.13039/501100011033] and to ER INTSENSO [MICINN-FEDER-PID2019-109991GB-I00]. It was also funded by the French Government through the Chair SILVERSIGHT to AA [ANR-14-CHIN-0001 & ANR-18-CHIN-0002], the LabEx LIFESENSES to AA [ANR-10-LABX-65], and the IHU FOReSIGHT to AA [ANR-18-IAHU-01]. Funding for open access charge: CBUA/Universidad de Granada.
The inferior olivary (IO) nucleus makes up the signal gateway for several organs to the cerebellar cortex. Located within the sensory–motor-cerebellum pathway, the IO axons, i.e., climbing fibres (CFs), massively synapse onto the cerebellar Purkinje cells (PCs) regulating motor learning whilst the olivary nucleus receives negative feedback through the GABAergic nucleo-olivary​ (NO) pathway. The NO pathway regulates the electrical coupling (EC) amongst the olivary cells thus facilitating synchrony and timing. However, the involvement of this EC regulation on cerebellar adaptive behaviour is still under debate. In our study we have used a spiking cerebellar model to assess the role of the NO pathway in regulating vestibulo-ocular-reflex (VOR) adaptation. The model incorporates spike-based synaptic plasticity at multiple cerebellar sites and an electrically-coupled olivary system. The olivary system plays a central role in regulating the CF spike-firing patterns that drive the PCs, whose axons ultimately shape the cerebellar output. Our results suggest that a systematic GABAergic NO deactivation decreases the spatio-temporal complexity of the IO firing patterns thereby worsening the temporal resolution of the olivary system. Conversely, properly coded IO spatio-temporal firing patterns, thanks to NO modulation, finely shape the balance between long-term depression and potentiation, which optimises VOR adaptation. Significantly, the NO connectivity pattern constrained to the same micro-zone helps maintain the spatio-temporal complexity of the IO firing patterns through time. Moreover, the temporal alignment between the latencies found in the NO fibres and the sensory–motor pathway delay appears to be crucial for facilitating the VOR. When we consider all the above points we believe that these results predict that the NO pathway is instrumental in modulating the olivary coupling and relevant to VOR adaptation.
EU to FN NEUSEQBOT [91774] and to Human Brain Project Specific Grant Agreement 3 to ER [H2020-RIA. 945539]
Andalusian Regional Government (Spain) and EU to ER CEREBIO [P18-FR-2378] and to NRL [A-TIC-276-UGR18]
Spanish Ministry of Science and Innovation to NRL SPIKEAGE [MICINN-PID2020-113422G A-I00] ref [MCIN/ AEI/10.13039/501100011033] and to ER INTSENSO [MICINN-FEDER-PID2019-109991GB-I00]
French Government through the Chair SILVERSIGHT to AA [ANR-14-CHIN-0001 & ANR-18-CHIN-0002]
LabEx LIFESENSES to AA [ANR-10-LABX-65]
IHU FOReSIGHT to AA [ANR-18-IAHU-01]
Funding for open access charge: CBUA/Universidad de Granada
Databáze: OpenAIRE
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