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Sample NIRS finger tapping data


The subject is myself. I did a simple finger tapping task. I continuously tapped my right hand on the table for 10s, then rest for 20s. Then repeat this tapping-rest cycle for 20 times.

NIRS signals were recorded by Hitachi ETG-4000.

The data is very good: you can see the changes of HbO and HbR in the individual trials in motor cortex (channel 13 this case). See figure below:

(click to zoom)

The data is available for download (fill the form below). Here is the description:

1. This data file can be loaded in MatLab (using the load command).

2. After loading the data, there are 3 variables, hbo,hbr,marker. hbo is oxy-Hb data, hbr is deoxy-Hb data, and marker indicates the timing of the finger tapping event.

3. hbo and hbr are 7562×24 matrices. Each column is for a channel (and we totally have 24 channels), each row is for one time point. The sampling frequency is 10Hz.

4. mark is a 40×2 matrix. The first column can be ignored. The 2nd column is the timing of the onset and offset of finger tapping alternatingly.

To download the data, fill the following form and click Submit button. You will receive a download link shortly.

Author: Xu Cui Categories: nirs Tags:
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About the author:

Xu Cui is a human brain research scientist in Stanford University. He lives in the Bay Area in the United States. He is also the founder of Stork (smart publication alert app), PaperBox and BizGenius.


He was born in He'nan province, China. He received education in Beijing University(BS), University of Tennessee (Knoxville) (MS), Baylor College of Medicine (PhD) and Stanford University (PostDoc). Read more ...
  1. Hanieh Moni
    June 2nd, 2017 at 14:49 | #1

    Dear Dr. Cui,

    Thank you for your huge contribution on NIRS. DO you have any sample finger tapping data includes at elat one short channel?


  2. June 2nd, 2017 at 14:50 | #2

    What is elat one short channel?

  3. N
    September 26th, 2017 at 19:29 | #3

    Hi Xu,
    Do you happen to have the filtering/motion-artifact-removal information available?
    - high-pass/low-pass frequencies for the band-pass filter.
    - method used for motion-artifact-removal.

    I’m trying to use the data, but not getting the correct response.


  4. September 27th, 2017 at 11:37 | #4

    Nav, please check out http://www.alivelearn.net/?s=noise+nirs to see if there are any info useful. The data provided here is fairly clean though.

  5. N
    September 27th, 2017 at 15:51 | #5

    @Xu Cui
    Many thanks.

  6. Nauman
    October 13th, 2018 at 11:04 | #6

    Hi Professor,
    I am new at using ETG-4000 I have a small query that is ETG-4000 provides absolute HbO, HbR and HbT or change in concentration of HbO, HbR and HbT. I have read many papers they first download data from ETG-4000 and then apply MBLL in order to get a change in concentration of HbO, HbR and HbT. Waiting for your kind reply.


  7. October 13th, 2018 at 12:03 | #7


    I believe it’s relative.

  8. Nauman
    October 13th, 2018 at 20:56 | #8

    thank you, Professor, so we don’t need to apply MBLL in order to get change and we can directly download the HBO, HbR and HbT for further analysis? is that right?

  9. October 13th, 2018 at 21:52 | #9

    Correct. However, ETG4000 does offer you an option to download the raw light intensity data.

  10. Nauman
    October 15th, 2018 at 00:03 | #10

    Thank you, professor, for your kind reply and help.

  11. Agustin Humberto Rovira
    November 19th, 2018 at 08:00 | #11

    Hi profesor Xu Cui

    I whish know if there is a paper related to this data. I would recopile data in my lab with my own equipment and then compared it with a stablish study to check if my prosessing analysis is correct. For that I am locking for a finger tapping protocol where it studies the activation in task period vs rest