Electrical Engineering and Computer Science

Solid State Electronics Lab Seminar

Using Locally Competitive Algorithms to Model Top-Down and Lateral Interactions between Cortical Neurons

Garrett T. Kenyon

Technical Staff Member, Physics Division
Los Alamos National Laboratory
 
Friday, February 14, 2014
10:30am - 12:00pm
Room 1500 EECS, 1301 Beal Ave, UM North Campus

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About the Event

Cortical connections consist of feedforward, feedback and lateral pathways.  However, most functional models of visual cortex only account for feedforward connections. Additionally, most models of visual cortex fail to account both for the thalamic projections to non-striate areas and the reciprocal connections from extrastriate areas back to the thalamus. In this talk, I will describe how a modified Locally Competitive Algorithm (LCA; Rozell et al, Neural Comp, 2008) can be used as a unifying framework for exploring the role of top-down, lateral and poly-thalamocortical pathways within the context of deep, sparse, generative models. LCA is expressed entirely in terms of simple elements all performing the same local input-output operations and is thus amenable to massively parallel implementation in  custom hardware.  We project that algorithms based on LCA will achieve orders of magnitude reductions in size, weight and power (SWaP).  We are currently applying LCA to the problem of object detection and tracking in aerial video with the goal of enabling unmanned and other mobile platforms to achieve state-of-the-art performance on difficult pattern-recognition tasks in environments where limits on SWaP represent the dominant constraints.

Biography

Garrett Kenyon received his PhD in Physics from the University of Washington in 1990 but has worked primarily as a computational neuroscientist throughout his career. He is presently a staff member at the Los Alamos National Laboratory.  His current research interests include large-scale simulations of retinal and cortical circuits, development of open-source high-performance neural simulation tools (PetaVision), and biologically-inspired distributed sensor systems.

Additional Information

Contact: Prof. Mina Rais-Zadeh

Phone: 734-764-4249

Email: minar@eecs.umich.edu

Sponsor: Solid State Electronics Laboratory

Open to: Public

Web Page: https://sites.google.com/site/garkenyon/home