Harrison, Reid R. and Koch, Christof (1998) An Analog VLSI Model of the Fly Elementary Motion Detector. In: Advances in Neural Information Processing Systems 10 (NIPS 1997). Advances in Neural Information Processing Systems . No.10. MIT Press , Cambridge, MA, pp. 880-886. ISBN 0-262-10076-2 http://resolver.caltech.edu/CaltechAUTHORS:20160223-164719841
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Flies are capable of rapidly detecting and integrating visual motion information in behaviorly-relevant ways. The first stage of visual motion processing in flies is a retinotopic array of functional units known as elementary motion detectors (EMDs). Several decades ago, Reichardt and colleagues developed a correlation-based model of motion detection that described the behavior of these neural circuits. We have implemented a variant of this model in a 2.0µm analog CMOS VLSI process. The result is a low-power, continuous-time analog circuit with integrated photoreceptors that responds to motion in real time. The responses of the circuit to drifting sinusoidal gratings qualitatively resemble the temporal frequency response, spatial frequency response, and direction selectivity of motion-sensitive neurons observed in insects. In addition to its possible engineering applications, the circuit could potentially be used as a building block for constructing hardware models of higher-level insect motion integration.
|Item Type:||Book Section|
|Additional Information:||© 1998 Massachusetts Institute of Technology. This work was supported by the Center for Neuromorphic Systems Engineering as a part of NSF's Engineering Research Center program, and by ONR. Reid Harrison is supported by an NDSEG fellowship from ONR. We thank Bradley Minch, Holger Krapp, and Rainer Deutschmann for invaluable discussions.|
|Group:||KLAB, Koch Laboratory|
|Usage Policy:||No commercial reproduction, distribution, display or performance rights in this work are provided.|
|Deposited By:||Kristin Buxton|
|Deposited On:||24 Feb 2016 00:52|
|Last Modified:||24 Feb 2016 00:52|
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