Project name Surface color and predictability determine contextual modulation of macaque V1 firing and gamma oscillations 17-09-2018-RA-eLife-42101R1 Citation Peter A, Uran C, Klon-Lipok J, Roese R, van Stijn S, Barnes W, Dowdall JR, Singer W, Fries P, Vinck M (2019) Surface color and predictability determine contextual modulation of V1 firing and gamma oscillations. eLife 8: e42101. https://doi.org/10.7554/eLife.42101 Contact information Alina Peter, alina.peter@esi-frankfurt.de; Martin Vinck, martinvinck@gmail.com We strongly encourage prospective users of this dataset to first contact the authors! Description of data processing steps This project contains data from the eLife publication 'Surface color and predictability determine contextual modulation of macaque V1 firing and gamma oscillations'. Please carefully read the publication and in particular the methods section. 5 datasets were recorded as described in the paper, each is saved in an individual folder. In each folder, we provide Matlab .mat files for the individual sessions of each monkey in each dataset, and a description of the conditions in a separate file. Data were preprocessed using custom Matlab code and the FieldTrip toolbox (Oostenveld et al, 2011) to generate structures containing individual trials, as well as channel labels and condition numbers. LFP spectra and MUA are saved in separate files, the different filtering for these data types and resulting measurement units are described in the publication. Description for each file or group of files: Files have the following structure: monkeyInitial_Dataset#_session#_condInfo.mat for matrix of conditions, and condition labels (typically values and stimulus position and type if needed). All other details are described in the publication. monkeyInitial_Datatype_Dataset#_session#.mat for data files of type LFP or MUA. Note that single trials are not in chronological order, but do have an individual ID number in the second column of the field trialinfo. This can be used to assign MUA to LFP data etc. LFP files contain single-trial spectra, filtered and tapered as described in the Methods of the publication. There are separate structures for the baseline and stimulus period (in 500ms snippets saved separately). For dataset 2, data was cut into two stimulus periods corresponding to the initial stimulus and the stimulus with onset at 600ms post stimulus 1. MUA files contain time-resolved analog MUA and are provided for datasets 1-3 (i.e. when used in the publication). References Oostenveld, R., Fries, P., Maris, E., Schoffelen, JM (2011). FieldTrip: Open Source Software for Advanced Analysis of MEG, EEG, and Invasive Electrophysiological Data. Computational Intelligence and Neuroscience, Volume 2011 (2011), Article ID 156869, doi:10.1155/2011/156869