The "MNIST" of Brain Digits

The version 1.03 of the open database contains 1,207,293 brain signals of 2 seconds each, captured with the stimulus of seeing  a digit (from 0 to 9) and thinking about it, over the course of almost 2 years between 2014 & 2015, from a single Test Subject David Vivancos.

All the signals have been captured using commercial EEGs (not medical grade), NeuroSky MindWave, Emotiv EPOC, Interaxon Muse & Emotiv Insight, covering a total of 19 Brain (10/20) locations.

Four files are available for download:

DataBase File Zip size File size Date Mirror
MindWave MindBigData-MW-v1.0.zip 62,6 MB (65,663,303 bytes) 297 MB (311,994,495 bytes) 09/11/2015
EPOC MindBigData-EP-v1.0.zip 409 MB (429,732,466 bytes) 2,66 GB (2,859,712,035 bytes) 09/11/2015 US DataHub Mirror
Muse MindBigData-MU-v1.0.zip 62,6 MB (65,663,303 bytes) 297 MB (311,994,495 bytes) 09/11/2015
Insight* MindBigData-IN-v1.05.zip 29,0 MB (30,498,860 bytes) 184 MB (193,010,330 bytes) 10/14/2015

We built our own tools to capture them, but there is no post-processing on our side, so they come raw as they are read from each EEG device, in total 395,072,896 Data Points.

Feel free to test any machine learning, deep learning or whatever algorithm you think it could fit, we only ask for acknowledging the source and please let us know of your performance! 

We choose not to differentiate the signals into training/test/validation  sets at this point so pick the distribution you prefer.

A small portion of the signals were captured without the stimulus of seeing the digits for contrast, all are random actions not related to thinking or seeing digits, you can decide to use them or not in your tests, they use the code -1.


This is the distribution of the signals per device and digit:

Device/Digit 0 1 2 3 4 5 6 7 8 9 -1 Total
MindWave (MW) 5,531 5,498 5,517 5,416 5,381 5,568 5,476 5,552 5,545 5,450 12,701 67,635
EPOC (EP) 91,224 88,914 90,930 92,652 88,886 91,994 91,322 88,718 91,728 91,882 2,226 910,476
Muse (MU) 11,904 11,632 11,920 11,832 11,536 12,052 12,368 12,080 12,208 11,988 44,412 163,932
Insight (IN)* 6,305 6,740 6,535 6,605 6,620 6,460 6,425 6,470 6,590 6,500 0 65,250
Total 114,964 112,784 114,902 116,505 112,423 116,074 115,591 112,820 116,071 115,820 59,339 1,207,293

* Insight captures started in September 2015, so soon will be updated with more brain signals, last update 10/14/2015 v1.05


The data is stored in a very simple text format including:

[id]: a numeric, only for reference purposes.

[event] id, a integer, used to distinguish the same event captured at different brain locations, used only by multichannel devices (all except MW).

[device]: a 2 character string, to identify the device used to capture the signals, "MW" for MindWave, "EP" for Emotive Epoc, "MU" for Interaxon Muse & "IN" for Emotiv Insight.

[channel]: a string, to indentify the 10/20 brain location of the signal, with possible values:
MindWave "FP1"
EPOC "AF3, "F7", "F3", "FC5", "T7", "P7", "O1", "O2", "P8", "T8", "FC6", "F4", "F8", "AF4"
Muse "TP9,"FP1","FP2", "TP10"
Insight "AF3,"AF4","T7","T8","PZ" 

[code]: a integer, to indentify the digit been thought/seen, with possible values 0,1,2,3,4,5,6,7,8,9 or -1 for random captured signals not related to any of the digits.

[size]: a integer, to identify the size in number of values captured in the 2 seconds of this signal, since the Hz of each device varies, in "theory" the value is close to 512Hz for MW, 128Hz for EP, 220Hz for MU & 128Hz for IN, for each of the 2 seconds.

[data]: a coma separated set of numbers, with the time-series amplitude of the signal, each device uses a different precision to identify the electrical potential captured from the brain: integers in the case of MW & MU or real numbers in the case of EP & IN.

There is no headers in the files,  every line is  a signal, and the fields are separated by a tab

For example one line of each device could be (without the headers)

[id] [event] [device] [channel] [code] [size] [data]
27 27 MW FP1 5 952 18,12,13,12,5,3,11,23,37,36,26,24,35,42……
67650 67636 EP F7 7 260 4482.564102,4477.435897,4484.102564…….
978210 132693 MU TP10 1 476 506,508,509,501,497,494,497,490,490,493……
1142043 173652 IN AF3 0 256 4259.487179,4237.948717,4247.179487,4242.051282……


Each EEG device capture the signals via different sensors, located in these areas of my brain, the color represents the device:    MindWave, EPOC, Muse, Insight

David Vivancos Brain 10/20 Locations


- Giving sense to EEG records ( course IFT6390 "machine learning" by Pascal Vincent from MILA) by Amin Shahab, Marc Sayn-Urpar, René Doumbouya, Thomas George & Vincent Antaki.

Contact us if you need any more info.

Let's decode My Brain!
October 14th 2015
David Vivancos

This MindBigData The "MNIST" of Brain Digits is made available under the Open Database License: http://opendatacommons.org/licenses/odbl/1.0/. Any rights in individual contents of the database are licensed under the Database Contents License: http://opendatacommons.org/licenses/dbcl/1.0/