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About hc-2

Information about the hc-2 data set.

Summary.

The data set contains multichannel simultaneous recordings made from layer CA1 of the right dorsal hippocampus of three Long-Evans rats during open field tasks in which the animals chased randomly placed drops of water or pieces of Froot Loops while on a elevated square platform.   Data for 21 experiments are included.  The duration of the experiments ranged from about 17 minutes to 1 hour 46 minutes.  Total time for all experiments is about 19 hours.  The raw (broadband) data was recorded at 20KHz, simultaneously from 31 to 64 channels.  The raw data was processed to extract the LFPs (Local Field Potentials) and detect spikes. Included in the data set are the following items:
  • Raw (broadband data).
  • Files generated by processing the raw data to extract LFPs and detect spikes.
  • The coordinate and direction of the rats head during the experiment, given both as video files showing the position of the head, and numeric values that were extracted from the videos.
  • Matlab scripts and links to the open source software that was used to process the data.

More information about the experiments and data processing are given in the documents listed at the bottom of this page. A publication based on the data is:
Mizuseki K, Sirota A, Pastalkova E, Buzsáki G., Neuron. 2009 Oct 29;64(2):267-80. (http://www.ncbi.nlm.nih.gov/pubmed/19874793).

Format of the data.

Format of the data is described in crcns-hc2-data-description.pdf.  The data is organized into directories for each experimental session.  (The sessions are listed at the end of the above document). The total size of the data is about 136 GB compressed and about 180 GB uncompressed. Not all of the data needs to be downloaded to start using the data. The smallest size session data (directory “ec013.527”) is 1.3 GB compressed and 1.8 GB uncompressed. It would be enough to get started.

How to download the data.

See the download link. Once logged in, data is available in the hc-2 Downloads folder. Read the document “crcns-hc2-download-instructions.pdf” (in the hc-2 download folder) for instructions about downloading and unpacking the hc2 data set files.  Note: to see this file may require scrolling down towards the bottom of the hc-2 downloads page.

Getting help using the data.

If you have questions about using the data, post them on the forum for using data sets.  It is also possible to email questions to the data contributors.  Instructions for doing this are included with the download.  However, posting questions to the forum is preferable because then everyone can see the answers.

How to cite the data

Publications created through usage of the data should cite the publication referenced above (Mizuseki K., et. al., Neuron. 2009), and also cite the data set using the following:

Mizuseki K, Sirota A, Pastalkova E, Buzsáki G. (2009): Multi-unit recordings from the rat hippocampus made during open field foraging.
http://dx.doi.org/10.6080/K0Z60KZ9

The above citation uses a Digital Object Identifier (DOI) which is assigned to the data set.  The DOI was created using DataCite (www.datacite.org) and the California Digital Library, "EZID" system (n2t.net/ezid/).

Documentation files

crcns-hc2-data-description.pdf
crcns-hc2-processing-flowchart.pdf
crcns-hc2-scripts-and-programs.pdf
crcns-hc2-shank_maps.pdf

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