Christopher Eliasmith

Chris Eliasmith is a Professor jointly-appointed in the Systems Design Engineering department and the Philosophy department, and is also cross-appointed to Computer Science at the University of Waterloo. He is the Director of the Centre for Theoretical Neuroscience at Waterloo, as well as the Canada Research Chair in Theoretical Neuroscience. The Centre focuses on mathematical characterizations of a variety neural systems, from individual ion channels to large-scale networks.

Professor Eliasmith heads the Computational Neuroscience Research Group (CNRG), which is developing a framework for modelling the function of complex neural systems (the Neural Engineering Framework or NEF). The NEF is grounded in the principles of signal processing, control theory, statistical inference, and good engineering design, while providing a rational and robust strategy for simulating and evaluating a variety of biological neural circuit functions. Members of the group apply the NEF to projects characterizing sensory processing, motor control, and cognitive function.

Work at the CNRG is divided into applications and theoretical development. Theoretical work includes extending the NEF to be more general (e.g. account for a wider range of single cell dynamics), more biologically plausible (e.g., capture network physiology and topology more precisely), and more adaptive (e.g., including better adaptive filtering, learning, etc.). The CNRG members are exploring general brain functions to explain not only how neural systems implement complex dynamics (the focus of the NEF), but also what neural systems are designed to do in general – i.e., what the basic functional principles of the brain are.

Regarding applications, the CNRG is building complex single cell networks to test hypotheses about the functioning of a given neural system as well as artificial intelligence and robotics applications. The simulation results are compared against available neural and behavioural data, and are then used to make novel predictions. CNRG members have constructed models of nonlinear adaptive arm control, working memory, locomotion, decision making, quadcopter control, the basal ganglia (implicated in Parkinsons Disease), rodent navigation, and language use.

Professor Eliasmith’s research team successfully built the world’s most complex simulation of the human brain – Semantic Pointer Architecture Unified Network (SPAUN). SPAUN consists of 2.5 million simulated neurons, enabling it to perform 8 tasks such as copy drawing, counting, answering questions and fluid reasoning. It runs on a supercomputer, has a digital eye that is used for visual input and a robotic arm used for drawing its responses.

Professor Eliasmith is the author of “How to build a brain: A neural architecture for biological cognition” and co-author of “Neural Engineering: Computation, representation and dynamics in neurobiological systems”.

• Ergonomics
• Human Factors & Biomedical
• Modeling & Simulation
• Pattern Analysis
• Machine Intelligence & Robotics
• Signal & Image Processing
• Modeling the function of complex neural systems
• Theoretical neuroscience
• Operational Artificial Intelligence
• Robotics

• 2000, Doctorate, Philosophy-Neuroscience-Psychology Program, Washington University in St. Louis
• 1995, Master's, M.A. Philosophy, University of Waterloo
• 1994, Bachelor's, B.A.Sc. Systems Design Engineering, First Class Honours, University of Waterloo

• SYDE 750 - Topics in Systems Modelling
  • Taught in 2014, 2015, 2016, 2017
• SYDE 556 - Simulating Neurobiological Systems
  • Taught in 2015, 2016, 2017

• Voelker, Aaron R and Eliasmith, Chris, Improving spiking dynamical networks: Accurate delays, higher-order synapses, and time cells, Neural computation, 30(3), 2018, 569 - 609
• Blouw, Peter and Eliasmith, Chris, Using Neural Networks to Generate Inferential Roles for Natural Language, Frontiers in psychology, 8, 2017
• Kajić, Ivana and Gosmann, Jan and Stewart, Terrence C and Wennekers, Thomas and Eliasmith, Chris, A spiking neuron model of word associations for the Remote Associates Test, Frontiers in psychology, 8, 2017
• Rasmussen, Daniel and Voelker, Aaron and Eliasmith, Chris, A neural model of hierarchical reinforcement learning, PloS one, 12(7), 2017
• Crawford, Eric and Gingerich, Matthew and Eliasmith, Chris, Biologically Plausible, Human-Scale Knowledge Representation, Cognitive science, 40(4), 2016, 782 - 821
• Hunsberger, Eric and Eliasmith, Chris, Training spiking deep networks for neuromorphic hardware, arXiv preprint arXiv:1611.05141, 2016
• Bekolay, Trevor and Bergstra, James and Hunsberger, Eric and DeWolf, Travis and Stewart, Terrence C and Rasmussen, Daniel and Choo, Xuan and Voelker, Aaron and Eliasmith, Chris, Nengo: a Python tool for building large-scale functional brain models, Frontiers in neuroinformatics, 7, 2014
• Tripp, B. and C. Eliasmith, Neural populations can induce reliable postsynaptic currents without observable spike rate changes or precise spike timing., Cerebral Cortex(17), 2007, 1830 - 1840
• Parisien, C., C. H. Anderson, and C. Eliasmith, Solving the problem of negative synaptic weights in cortical models., Neural Computation
• Singh, R. and C. Eliasmith, Higher-dimensional neurons explain the tuning and dynamics of working memory cells, Journal of Neuroscience(26), 2006, 3667 - 3678
• Eliasmith, C., A new perspective on representational problems., Journal of Cognitive Science, 6, 2005, 97 - 123
• Conklin, J. and C. Eliasmith, An attractor network model of path integration in the rat., Journal of Computational Neuroscience, 18, 2005, 183 - 203
• Kuo, D. and C. Eliasmith, Integrating behavioral and neural data in a model of zebrafish network interaction., Biological Cybernetics, 93(3), 2005, 178 - 187
• Eliasmith, C., A unified approach to building and controlling spiking attractor networks., Neural Computation, 17(6), 2005, 1276 - 1314
• Eliasmith, C., Learning context sensitive logical inference in a neurobiological simulation., AAAI Fall Symposium on Compositional Connectionism in Cognitive Science, 2004, 17 - 20
• Knight, James and Voelker, Aaron R and Mundy, Andrew and Eliasmith, Chris and Furber, Steve, Efficient SpiNNaker simulation of a heteroassociative memory using the Neural Engineering Framework, Neural Networks (IJCNN), 2016 International Joint Conference on, 1 2016, 5210 - 5217
• Blouw, Peter and Eliasmith, Chris and Tripp, B, A scaleable spiking neural model of action planning, Proceedings of the 38th Annual Conference of the Cognitive Science Society, 1 2016, 1583 - 1588
• Eliasmith, Chris, How to build a brain: A neural architecture for biological cognition,
• Eliasmith, C. and C. H. Anderson, Neural Engineering: Computation, representation and dynamics in neurobiological systems., MIT Press