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About hc-2

Information about the hc-2 data set.

Note: A problem was discovered with this data set.  Please wait until the problem is fixed (this notice removed) before downloading.  Problem discovered on Feb. 1, 2010.

Summary.

The data set was contributed by the Gyorgy Buzsáki lab at Rutgers University.  It consists of recordings made from the right dorsal hippocampus of three Long-Evans rats during open field tasks in which the rats chased randomly placed drops of water or pieces of Froot Loops while on a elevated square platform. The recordings are multichannel. They were made using either a four or eight shank probe, with each shank having 8 recording sites, making a total of either 32 or 64 simultaneously recorded channels. Raw (broadband) data was recorded at 20KHz. 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 et. al., 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.

Documentation files

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

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