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NeuroScope reads electrophysiological data from a set of files. Each of these files has a name of the form base.ext or base.n.ext (or base.ext.n), where base stands for the common base name of all files belonging to a single recording session, ext is an extension describing the type of data stored in the file, and n stands for the ID of the particular group of channels from which the data was recorded. Thus, using this convention the data for session CS150612 would be named CS150612.dat, the filter data for local filed potentials would be named CS150612.eeg and the cluster file for tetrode 2 would be named CS150612.2.clu or CS150612.clu.2.
More specifically, the data files are organized as described in the following sections.
Generic file name: base.dat for the raw data, base.eeg for local field potentials, and more generally base.ext for any other type of filtered data (where ext is extension describing the type of data stored in the file).
Format: 12, 14, 16 or 32 bit binary.
The data file contains the data for each channel. Assuming N1 channels (channel1...channelN1) and N2 samples (sample1...sampleN2) the data are stored as follows:
sample1_channel1 sample1_channel2 ... sample1_channelN1 sample2_channel1 sample2_channel2 ... sample2_channelN1 ... sampleN2_channelN1
Generic file name: base.n.clu (or base.clu.n)
Format: ASCII
The cluster file lists the cluster ID of each spike, one per line. The first line contains the total number of clusters. Assuming N spikes (spike1...spikeN), this file looks like:
nClusters clusterID_spike1 clusterID_spike2 clusterID_spike3 ... clusterID_spikeN
Notice that the last line must end with a newline or carriage return.
Generic file name: base.n.res (or base.res.n)
Format: ASCII
The spike time file lists the timestamp for each spike. The timestamp is expressed in multiples of the sampling interval. For instance, for a 20kHz recording (50 microsecond sampling interval), a timestamp of 200 corresponds to 200x0.000050s=0.01s from the beginning of the recording session.
Assuming N spikes (spike1...spikeN), this file looks like:
timestamp_spike1 timestamp_spike2 timestamp_spike3 ... timestamp_spikeN
Notice that the last line must end with a newline or carriage return.
Generic file name: basename.ext.evt or basename.evt.ext (where ext is a three-letter extension describing the type of data stored in the file)
Format: ASCII
The event file lists the events and their timestamps. The timestamps are given in miliseconds (floating point values) and the event types are arbitrary strings.
Assuming N events (event1...eventN), this file looks like:
timestamp_event1 description_event1 timestamp_event2 description_event2 timestamp_event3 description_event3 ... timestamp_eventN description_eventN
Notice that the last line must end with a newline or carriage return.
Generic file name: basename.ext (where ext can be any three-letter extension)
Format: ASCII
The position file lists the x and y coordinates of the each spot. Assuming N position samples (position1...positionN) and M spots on the head of the animal, this file looks like:
x_position1_spot1 y_position1_spot1 ... x_position1_spotM y_position1_spotM x_position2_spot1 y_position2_spot1 ... x_position2_spotM y_position2_spotM ... x_positionN_spot1 y_positionN_spot1 ... x_positionN_spotM y_positionN_spotM
By convention, spots which have not been detected by the video recording system should be given negatives coordinates. These spots will not be drawn in the position view.
Notice that the last line must end with a newline or carriage return.
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