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[Illinois]: Direction Selectivity

By Bara Saadah1, Nahil Sobh1, AbderRahman N Sobh1, Jessica S Johnson1, NanoBio Node1

1. University of Illinois at Urbana-Champaign

This tool implements a simple direction selective network.

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Version 1.3b - published on 06 Aug 2014

doi:10.4231/D3PZ51N0T cite this

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In direction selectivity, inhibition only occurs in one direction. Naturally, when selectivity detects left-to-right motion, inhibition occurs from right-to-left. This makes sense because when a pitcher throws a ball and the lights in the room go out, you expect the ball to keep moving forward, which is the selective direction. You don't expect the ball to go backwards or jerk back, so if that seems to happen, then it is inhibition. Direction selectivity models this problems through matrices in which a positive "1" represents excitatory inputs, negative "1"s represent inhibitory inputs, and "0"s represent no connection at all between the inputs.

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NanoBio Node, University of Illinois Champaign-Urbana


Anastasio, Thomas J. Tutorial on Neural Systems Modeling. Sunderland: Sinauer Associates, 2010. Print.

Cite this work

Researchers should cite this work as follows:

  • Bara Saadah; Nahil Sobh; AbderRahman N Sobh; Jessica S Johnson; NanoBio Node (2014), "[Illinois]: Direction Selectivity," (DOI: 10.4231/D3PZ51N0T).

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Tags, a resource for nanoscience and nanotechnology, is supported by the National Science Foundation and other funding agencies. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s) and do not necessarily reflect the views of the National Science Foundation.