2026-04-13T06:43:35Zhttps://recercat.cat/oai/request
oai:recercat.cat:2445/1794592025-12-04T20:43:09Zcom_2072_1057col_2072_478822col_2072_478917
RECERCAT author Estévez Priego, Estefanía author Teller Amado, Sara author Granell, Clara author Arenas, Àlex author Soriano i Fradera, Jordi 2021-07-28T14:13:34Z2021-07-28T14:13:34Z2020-12-232021-07-28T14:13:35Z An elusive phenomenon in network neuroscience is the extent of neuronal activity remodeling upon damage. Here, we investigate the action of gradual synaptic blockade on the effective connectivity in cortical networks in vitro. We use two neuronal cultures configurations one formed by about 130 neuronal aggregates and another one formed by about 600 individual neurons and monitor their spontaneous activity upon progressive weakening of excitatory connectivity. We report that the effective connectivity in all cultures exhibits a first phase of transient strengthening followed by a second phase of steady deterioration. We quantify these phases by measuring GEFF, the global efficiency in processing network information. We term hyperefficiency the sudden strengthening of GEFF upon network deterioration, which increases by 20-50% depending on culture type. Relying on numerical simulations we reveal the role of synaptic scaling, an activity-dependent mechanism for synaptic plasticity, in counteracting the perturbative action, neatly reproducing the observed hyperefficiency. Our results demonstrate the importance of synaptic scaling as resilience mechanism. cc by (c) Massachusetts Institute of Technology, 2020 https://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess Sinapsi Neurotransmissió Synapses Neural transmission Functional strengthening through synaptic scaling upon connectivity disruption in neuronal cultures info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion