<p>Here are a few screenshots of what I observed. This is a screenshot of when I put the headset back on and purposely blinked. Noticed this particular shape in the signal repeating every time I did so.</p>
<p><a href="https://i.sstatic.net/3wOzx.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/3wOzx.png" alt="Blinking artifacts" /></a></p>
<p>And these are the so-called &quot;alpha&quot; and &quot;theta&quot; waves spikes I mentioned. Now I notice that it's simply due to blinking.</p>
<p><a href="https://i.sstatic.net/yK9jT.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/yK9jT.png" alt="Band Power of Different Frequencies" /></a></p>
<p>So basically every time I blinked, this would spike. I'm not going to pretend to understand why, but I'm guessing that it's because of the muscle movement, as I can see from the signals in the raw data, only some leads give me that output when I blink and I noticed all those leads are connected on regions of my scalp where I can feel my skin very subtly shift when I blink.</p>

CC BY-SA 4.0
2022-04-03T15:02:53.040Z
2022-04-03T15:02:53.040Z
rayank97
<p>I'm using the EPOC X EEG Headset from Emotiv. I was recording the raw EEG data while doing BCI training to &quot;push&quot; a cube on the EmoticBCI application. Going back to the recording after the training was done, I noticed that there were sustained levels of alpha waves during this, while almost no beta wave increase. I am very new to Neuroscience and am currently just experimenting with this device. From what I've read so far, alpha waves are supposed to increase in a relaxed state, while beta waves increase when one concentrates on something. Could someone explain to me why I am seeing increased alpha waves instead of beta waves?</p>

CC BY-SA 4.0
2022-03-29T17:10:07.907Z
Though not entirely specific to the question you're asking here, I have some other relevant answers here: https://psychology.stackexchange.com/questions/23623/how-can-we-know-which-types-of-brainwaves-is-dominated-at-particular-state/23625#23625 https://psychology.stackexchange.com/questions/20075/why-do-brains-oscillate-within-specific-frequency-ranges/20086#20086 In short, these bands are not "real", they are names, and statements like "alpha waves do this, beta waves do that" are all loose generalizations and simplifications.
Bryan Krause
CC BY-SA 4.0
2022-03-31T13:25:38.350Z
Thank you for the reference material. What I found interesting is that the power of each frequency is basically compared to a baseline and that's what we likely see.
However, in regards to my question, I noticed today that this spike in theta and alpha waves was periodic. So I put the headset back on and discovered that these spikes were simply the blinking artifacts. Learning moment for me. I'm trying to figure out now how to filter out the data sufficiently enough to see which sensor(s) is/are giving me a sustained output showing me "pushing" the cube.
rayank97
CC BY-SA 4.0
2022-03-31T13:50:00.333Z
With a couple figures showing the signals you are looking at that could be a good self-answer.
Bryan Krause
<neuroscience><eeg><brain-waves><concentration>
Alpha and Beta waves during BCI Training
rayank97
# Alpha and Beta waves during BCI Training

(Asked by: username_0 on 2022-03-29)

I'm using the EPOC X EEG Headset from Emotiv. I was recording the raw EEG data while doing BCI training to "push" a cube on the EmoticBCI application. Going back to the recording after the training was done, I noticed that there were sustained levels of alpha waves during this, while almost no beta wave increase. I am very new to Neuroscience and am currently just experimenting with this device. From what I've read so far, alpha waves are supposed to increase in a relaxed state, while beta waves increase when one concentrates on something. Could someone explain to me why I am seeing increased alpha waves instead of beta waves?

**Tags:** neuroscience, eeg, brain-waves, concentration

> **Comments:**
> **username_1**: Though not entirely specific to the question you're asking here, I have some other relevant answers here: https://psychology.stackexchange.com/questions/23623/how-can-we-know-which-types-of-brainwaves-is-dominated-at-particular-state/23625#23625 https://psychology.stackexchange.com/questions/20075/why-do-brains-oscillate-within-specific-frequency-ranges/20086#20086 In short, these bands are not "real", they are names, and statements like "alpha waves do this, beta waves do that" are all loose generalizations and simplifications.  
> **username_0**: Thank you for the reference material. What I found interesting is that the power of each frequency is basically compared to a baseline and that's what we likely see. However, in regards to my question, I noticed today that this spike in theta and alpha waves was periodic. So I put the headset back on and discovered that these spikes were simply the blinking artifacts. Learning moment for me. I'm trying to figure out now how to filter out the data sufficiently enough to see which sensor(s) is/are giving me a sustained output showing me "pushing" the cube.  
> **username_1**: With a couple figures showing the signals you are looking at that could be a good self-answer.  

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## 1 answers

### Answer by username_0 on 2022-04-03. Score: 1

Here are a few screenshots of what I observed. This is a screenshot of when I put the headset back on and purposely blinked. Noticed this particular shape in the signal repeating every time I did so.

[![Blinking artifacts](https://i.sstatic.net/3wOzx.png)](https://i.sstatic.net/3wOzx.png)

And these are the so-called "alpha" and "theta" waves spikes I mentioned. Now I notice that it's simply due to blinking.

[![Band Power of Different Frequencies](https://i.sstatic.net/yK9jT.png)](https://i.sstatic.net/yK9jT.png)

So basically every time I blinked, this would spike. I'm not going to pretend to understand why, but I'm guessing that it's because of the muscle movement, as I can see from the signals in the raw data, only some leads give me that output when I blink and I noticed all those leads are connected on regions of my scalp where I can feel my skin very subtly shift when I blink.


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