Retinotopic Mapping Program (RetMap v4.0)

RetMap is a retinotopic mapping program written in C++ (using DirectX 7.0) for windows 2000 and XP. The program uses a flickering checkerboard stimulus to drive visual cortex and implements either polar mapping with a single sweeping wedge, a bi-field sweeping wedge (Slotnick and Yantis, 2003), or static meridian mapping. In addition, arbitrarily defined wedges can be presented in random locations to identify areas of visual cortex corresponding to particular locations in space. RetMap features a GUI interface with fully adjustable parameters. Serial port or keyboard input may be used to initiate the presentation of the visual stimulus.

If you would like a copy of the program, please e-mail me (john<dot>serences<at>uci <dot>edu)and I will send you a link to download the program.

Please make the following citation if you use the bi-field (‘propeller’) mapping procedure:

Slotnick, S. & Yantis, S. Efficient acquisition of human retinotopic maps. Hum Brain Mapp. 2003 Jan;18(1):22-9.

 
compBV (supplemental analysis program for Brain Voyager, early test version)

This toolbox is a set of matlab functions meant to supplement the brain voyager analysis software. The matlab functions take as input a BV *.voi file containing volumes of interest (e.g. V1, MT, IPS), and will then extract the timeseries of all voxels within each VOI, process the data (normalization, motion artifact removal, etc), and compute estimated HRFs using event-related averaging or deconvolution. One advantage of this package is that it gives you access to voxel-by-voxel timeseries, which is not readily available from BV and this is ideal for performing multivariate pattern classification analyses.

This is a BETA version of the software, so testing and improvements are ongoing, and I'll try to keep the downloadable version up to date. However, please proceed with caution (e.g. check the results) until you are comfortable that you have the code working as desired. In addition, even if you don't use the gui based functionality, there may be useful snippets of code that can be extracted for customization.

All code was written using Matlab v7.x, and while I tried to keep my use of built in functions to a minimum, it is likely that at least version 7 (or later) is required.

Finally, the 'readme' instruction file should be enough to get started and I'll update it as time permits.

If you find bugs, please let me know so that I can try to fix them, thanks.

Download compBV

Last Updated January 16th, 2007