This directory contains data on the simulated LGN input spike trains as well
as the simulated background ("traveling wave", or "tw") spike trains.

Unzip all files.  The information about LGN cells (filters) is contained in
LGN_visual_space_positions_and_cell_types.zip, the information about LGN spike
trains is in files LGN_spk_*.zip, and all the infotmation about tw is in tw.zip.


Each directory LGN_spk_* contains .dat files with simulated spikes produced by LGN cells (filters) in response to various visual stimuli.

Every .dat file contains a certain number of trials (i.e., separate spike trains for each LGN cell), that are organized by cell.
Namely, if 10 trials are used, the first 10 lines are for the 1st LGN cell, the next 10 lines are for the 2nd LGN cell, and so on.
There are always 9,000 LGN cells, and therefore, in the case of 10 trials, the file contains 90,000 lines.

Each line contains spike times in ms.

Note that responses to natural images are produced in sequences, named as "imseq_...".  There are 100 such sequences for LGN_spk_2
and LGN_spk_3.  No natural images were used for LGN_spk_1.  Each sequence contains exactly the same 10 images, just in different
order.  Each image is shown for 250 ms.  Since a sequence is preceded by 500 ms of gray screen, each such simulation is 3,000 ms long.

The order of the images in the sequence is given in the file imseq_metadata.txt in LGN_spk_2 and LGN_spk_3.
In these metadata files, each line refers to a particular sequence (e.g., imseq_5), and the sequence of images is specified in the line.


NOTE that all simulations used 3 instantiations of LGN, the spikes from which are provided here.  Specifically, simulations LL1,
LR1, RL1, and RR1 used LGN_spk_1; simulations LL2, LR2, RL2, and RR2 used LGN_spk_2;
and simulations LL3, LR3, RL3, and RR3 used LGN_spk_3.


The parameters of the LGN cells themselves are listed in the following files:
LGN1_visual_space_positions_and_cell_types.dat
LGN2_visual_space_positions_and_cell_types.dat
LGN3_visual_space_positions_and_cell_types.dat

Each line corresponds to an LGN filter, with parameters saved in the following sequence:
type
x (in visual space, in "linear degrees")
y (in visual space, in "linear degrees")
offset_x (the x projection of the displacement between the receptive subfields centers, if the filter has two subfields; in "linear degrees")
offset_y (the y projection of the displacement between the receptive subfields centers, if the filter has two subfields; in "linear degrees")
sigma_c (the parameter of the spatial filter, in "linear degrees")
sigma_s (the parameter of the spatial filter, in "linear degrees")
r0 (spontaneous firing rate, in Hz)
scaling_factor (the magnitude of the filter -- a multiplicative factor applied to the filter to produce certain amplitude of visually evoked responses)
k_alpha (the parameter of the temporal filter, in ms^(-1))





Each directory tw_spk_* contains .dat files with simulated spikes produced by
backround tw sources.

Every .dat file in these directories contains a single trial; each line represents a spike train for one tw source.
There are always 3,000 tw sources, and therefore, each file contains 3,000 lines.

Each line contains spike times in ms.


NOTE that all simulations used 3 instantiations of tw sources, the spikes from which are provided here.  Specifically,
simulations LL1, LR1, RL1, and RR1 used tw_spk_1; simulations LL2, LR2, RL2, and RR2 used tw_spk_2;
and simulations LL3, LR3, RL3, and RR3 used tw_spk_3.


The parameters of the tw sources are listed in the following files:
tw1_sources.dat 
tw2_sources.dat 
tw3_sources.dat

Each line corresponds to a tw source, with parameters saved in the following sequence:

source ID
firing rate amplitude (in Hz)
x (in physical space, in um)
y (in physical space, in um)