title: Engineering a thalamo-cortico-thalamic circuit on SpiNNaker: a preliminary study toward modeling sleep and wakefulness.
abstract: We present a preliminary study of a thalamo-cortico-thalamic (TCT) implementation on SpiNNaker (Spiking Neural Network architecture), a brain inspired hardware platform designed to incorporate the inherent biological properties of parallelism, fault tolerance and energy efficiency. These attributes make SpiNNaker an ideal platform for simulating biologically plausible computational models. Our focus in this work is to design a TCT framework that can be simulated on SpiNNaker to mimic dynamical behavior similar to Electroencephalogram (EEG) time and power-spectra signatures in sleep-wake transition. The scale of the model is minimized for simplicity in this proof-of-concept study; thus the total number of spiking neurons is ≈1000 and represents a "mini-column" of the thalamocortical tissue. All data on model structure, synaptic layout and parameters is inspired from previous studies and abstracted at a level that is appropriate to the aims of the current study as well as computationally suitable for model simulation on a small 4-chip SpiNNaker system. The initial results from selective deletion of synaptic connectivity parameters in the model show similarity with EEG power spectra characteristics of sleep and wakefulness. These observations provide a positive perspective and a basis for future implementation of a very large scale biologically plausible model of thalamo-cortico-thalamic interactivity-the essential brain circuit that regulates the biological sleep-wake cycle and associated EEG rhythms.
authors.affiliation: School of Engineering, Engineering Hub, University of Lincoln Lincoln, Lincolnshire, UK.
authors.forename: Basabdatta S
authors.initials: BS
authors.lastname: Bhattacharya
authors.affiliation: School of Computer Science, APT Group, University of Manchester Manchester, Lancashire, UK.
authors.forename: Cameron
authors.initials: C
authors.lastname: Patterson
authors.affiliation: School of Computer Science, APT Group, University of Manchester Manchester, Lancashire, UK.
authors.forename: Francesco
authors.initials: F
authors.lastname: Galluppi
authors.affiliation: School of Psychology, Lincoln Sleep and Cognition Laboratory, University of Lincoln Lincoln, Lincolnshire, UK.
authors.forename: Simon J
authors.initials: SJ
authors.lastname: Durrant
authors.affiliation: School of Computer Science, APT Group, University of Manchester Manchester, Lancashire, UK.
authors.forename: Steve
authors.initials: S
authors.lastname: Furber
mesh_terms: D002540:Cerebral Cortex / Q000502:physiology*; D003198:Computer Simulation; D004569:Electroencephalography; D006801:Humans; D008959:Models, Neurological; D016571:Neural Networks, Computer; D009434:Neural Pathways / Q000502:physiology; D009474:Neurons / Q000502:physiology; D012890:Sleep / Q000502:physiology*; D013569:Synapses / Q000502:physiology; D013788:Thalamus / Q000502:physiology*; D014851:Wakefulness / Q000502:physiology*
keywords: Izhikevich model; PyNN; SpiNNaker; computational model; sleep; synaptic connectivity; thalamo-cortico-thalamic circuit