Thalamo-cortical spiking model of incremental learning combining perception,context and NREM-sleep |
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Authors: | Bruno Golosio Chiara De Luca Cristiano Capone Elena Pastorelli Giovanni Stegel Gianmarco Tiddia Giulia De Bonis Pier Stanislao Paolucci |
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Affiliation: | 1. Dipartimento di Fisica, Università di Cagliari, Cagliari, Italy ; 2. Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Cagliari, Cagliari, Italy ; 3. Ph.D. Program in Behavioural Neuroscience, “Sapienza” Università di Roma, Rome, Italy ; 4. Istituto Nazionale di Fisica Nucleare (INFN), Sezione di Roma, Rome, Italy ; 5. Dipartimento di Chimica e Farmacia, Università di Sassari, Sassari, Italy ; University of California San Diego, UNITED STATES |
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Abstract: | The brain exhibits capabilities of fast incremental learning from few noisy examples, as well as the ability to associate similar memories in autonomously-created categories and to combine contextual hints with sensory perceptions. Together with sleep, these mechanisms are thought to be key components of many high-level cognitive functions. Yet, little is known about the underlying processes and the specific roles of different brain states. In this work, we exploited the combination of context and perception in a thalamo-cortical model based on a soft winner-take-all circuit of excitatory and inhibitory spiking neurons. After calibrating this model to express awake and deep-sleep states with features comparable with biological measures, we demonstrate the model capability of fast incremental learning from few examples, its resilience when proposed with noisy perceptions and contextual signals, and an improvement in visual classification after sleep due to induced synaptic homeostasis and association of similar memories. |
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