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Non-directional transient cells

13 Nov 2009

Code covered by the BSD License

The code simulates magnocellular cells in Retina and lateral geniculate nucleus.

File Information
Description	This software has been realized by Praveen Pilly at the CNS Technology Lab at Boston University (http://techlab.bu.edu/). Attached is the source article and zipped file that contains a MATLAB-based graphical user interface with additional access to the non-directional transient cell equation, description, and source code. Reference Grossberg, S. , Rudd, M.E., Cortical dynamics of visual motion perception: Short-range and long-range apparent motion, Psychological Review , 99 , 78-121 (1992). Abstract The microcircuit for non-directional transient cells simulates how magnocellular cells in Retina and lateral geniculate nucleus are activated in response to temporal changes in the visual stimulus. This acts as the first stage of various motion processing models (Chey et al., 1997; Grossberg et al., 2001; Berzhanskaya et al., 2007; Grossberg & Pilly, 2008). Two kinds of these magnocellular cells, ON and OFF, give transient responses to bright stimulus onset and offset or dark stimulus offset and onset, respectively (Baloch et al., 1999; Schiller, 1992). These transient responses are sensitive to the contrast of the moving dots but not to the duration for which stimulus stays on or off beyond a critical duration (see Figure 2 in Grossberg & Pilly, 2008). ON and OFF transient cells code the leading and trailing edges, respectively, of a moving bright object (Schiller, 1992). Modeling the cross talk between ON and OFF cells is important to simulate direction judgments of contrast polarity-reversing or reverse-phi motion stimuli (Anstis, 1970; Anstis & Rogers, 1975; Baloch et al., 1999; Chubb & Sperling, 1989).
MATLAB release	MATLAB 7.5 (R2007b)
Other requirements	To use the software for the non-directional transient cells, download the package (NDTransientCells.zip) from the Download(s) below and unzip the contents into a local folder.
Zip File Content
HTML Files	NDTransientCells/Contact.html, NDTransientCells/Credits.html, NDTransientCells/License.html, NDTransientCells/NDTransientCells.html
Other Files	license.txt, NDTransientCells/GroRud1992PsyRev.pdf, NDTransientCells/NDTC_example.asv, NDTransientCells/NDTC_example_sim.asv, NDTransientCells/NDTC_example_sim.m, NDTransientCells/NDTCgui.fig, NDTransientCells/NDTCgui.m, NDTransientCells/NDTransientCells.asv, NDTransientCells/NDTransientCells.m, NDTransientCells/NDTransientCells_description.doc, NDTransientCells/NDTransientCells_description.pdf, NDTransientCells/NonDir.eps, NDTransientCells/NonDir.jpg, NDTransientCells/NonDir.png, NDTransientCells/untitled3.asv, NDTransientCells/untitled3.fig, NDTransientCells/untitled3.m

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Tag	Applied By	Date/Time
simulations	Massimiliano Versace	13 Nov 2009 13:09:20
neural networks	Massimiliano Versace	13 Nov 2009 13:09:20
visual cortex	Massimiliano Versace	13 Nov 2009 13:09:20
biological vision	Massimiliano Versace	13 Nov 2009 13:09:20
artificial neurons	Massimiliano Versace	13 Nov 2009 13:09:20

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