Segregation-to-integration transformation model of memory evolution

• Autores: Bavassi, Mariana Luz; Fuentemilla, Lluís
• Año de publicación: 2024
• Idioma: inglés
• Tipo de recurso: artículo
• Materia: NEURAL NETWORK; MODULARITY; CONSOLIDATION; REACTIVATION
• Institución: Consejo Nacional de Investigaciones Científicas y Técnicas

Memories are thought to use coding schemes that dynamically adjust their representational structure to maximize both persistence and efficiency. However, the nature of these coding scheme adjustments and their impact on the temporal evolution of memory after initial encoding is unclear. Here, we introduce the Segregation-to-Integration Transformation (SIT) Model, a network formalization that offers a unified account of how the representational structure of a memory is transformed over time. SIT model asserts that memories initially adopt a highly modular or segregated network structure, functioning as an optimal storage buffer by balancing protection from disruptions and accommodating substantial information.Over time, a repeated combination of neural network reactivations involving activation spreading and synaptic plasticity transforms the initial modular structure into an integrated memory form, facilitating intercommunity spreading and fostering generalization. The SIT Model identifies a non-linear or inverted U-shaped function in memory evolution where memories are most susceptible to changing their representation. This time window, located early during the transformation, is a consequence of memory’s structural configuration, where the activation diffusion across the network is maximized.
Fil: Bavassi, Mariana Luz. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Fisiología, Biología Molecular y Neurociencias. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Fisiología, Biología Molecular y Neurociencias; Argentina
Fil: Fuentemilla, Lluís. Universidad de Barcelona. Facultad de Psicologia; España