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About pag-1

Description of dataset pag-1 (Periaqueductal gray, dataset 1).

Summary of the data

These data were collected from the ventrolateral periaqueductal gray of 6 adult male, Long Evans rats using 16 – wire drivable microelectrode bundles. Data include 245 single units recorded from 88 behavior sessions. Fear discrimination sessions consisted of 32 trials with a mean ITI of 3.5 min. Auditory cues were 10 s in duration and consisted of repeating motifs of a broadband click, phaser, or trumpet. Each cue was associated with a unique probability of foot shock (0.5 mA, 0.5 s): danger, p = 1.00; uncertainty, p = 0.375; and safety, p = 0.00. Auditory identity was counterbalanced across rats. Foot shock was administered 2 s following the termination of the auditory cue on danger and uncertainty shock trials. The order of trial type presentation was randomly determined by the behavioral program, and differed for each rat, each session. After each discrimination session with recording, electrodes were advanced either 0.042 mm or 0.084 mm to record from new units during the following session. For four of the six rats, the electrode bundle was centered at -7.62 +/- 0.06 mm from Bregma, the other two rats had electrodes centered at -7.98 +0.06 mm from Bregma.

Data included are the result of spike sorting. Sample scripts used to visualize firing and behavior data from our main data file have been provided, as well as a sample regression which we have use to analyze the dataset. These data are currently under review and the complete methods will be available with that publication, which is:

Wright KM and McDannald MA. (2019); Ventrolateral periaqueductal gray neurons prioritize threat probability over fear output.  eLife.

Format of the data

The data is stored in Matlab files.  The format is described in the document linked to at the bottom of this page. Total data size is about 80 MB.

Conditions for usage of this data in publications

If you publish any work using the data, please cite the publication above Wright and McDannald (2019) and cite the data set using the following:

Wright KM and McDannald MA. (2019); Ventrolateral periaqueductal gray single-single unit activity during multi-cue fear discrimination in rats.

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

How to download the data

Data may be downloaded from:
A account is required. See the download link for more instructions.

Getting help using the data

If you have questions about using the data, please post them on the forum for using data sets.

Documentation file

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