[Eeglablist] (no subject)

[Pål Gunnar Larsson]

If you want to say something about the alpha band, you have to assess the alpha band. If you want to say something about 10Hz then it is up to you if you want to make a point of 10Hz being within the alpha band.

To make it more difficult: The alpha rhythm  is so called because it is normally within the alpha band, but may have frequencies outside the band. The frequencies are usually lower in youngsters.

Pål G. Larsson M.D., PhD.
Head of Clinical Neurophysiology
Department of Neurosurgery
Division of Surgery and Clinical Neuroscience

Oslo University Hospital
Po.box 4950 Nydalen
0424 Oslo
Norway
Tel:  (+47) 23074407
Mobile: (+47) 93429791
E-mail: pall at ous-hf.no<mailto:pall at ous-hf.no>
not sensitive

Fra: eeglablist-bounces at sccn.ucsd.edu [mailto:eeglablist-bounces at sccn.ucsd.edu] På vegne av jason roger
Sendt: 9. oktober 2015 20:31
Til: mmiyakoshi at ucsd.edu
Kopi: EEGLAB List
Emne: Re: [Eeglablist] (no subject)


Dear Makoto,

> Dear Jason,
>
> > These two sentence lead me to ask: why alpha band is 10 Hz not between 8 and 13 Hz?
>
> 10Hz is in 8-13Hz, so no problem to say 10Hz is alpha. It's trivial.

Thanks, this make sense now, and it is associated with EEGLAB tutorial.
>
> By the way I did not write the wiki or manual, so don't assume that I'm talking as an author. I'm just a volunteer and a SCCN post-doc.

No worries I know that you're not the author. I didn't contact any of the others about the issue I mentioned  because I know they will direct me to the list. Although you're a post-doc and you have a good experience,  the authors should also keep supervising the list regularly especially with aspects related to their design and tutorial.

I highly appreciate your effort dear Makoto for getting the responsibility answering our questions. All the best to you.

Thanks.
Jason

>
> Makoto
>
> On Fri, Oct 9, 2015 at 3:04 AM, jason roger <jasonroger8 at gmail.com<mailto:jasonroger8 at gmail.com>> wrote:
>>
>> Dear Makoto,
>>
>>
>>> Dear Jason,
>>>
>>> delta = =1-4
>>> theta == 4-8
>>> alpha == 8-13
>>> beta == 13-30
>>> gamma > 30
>>>
>>> These frequency segmentation comes from historical reason. I agree with Pal, it's better to take mean or max etc. within the rages to obtain representative values.
>>
>>
>> You are right; if we need to mention any wave, we need to determine it using its correct band range frequency, for instacne, beta band = 13-30. But the reason behind my question is that I observed in EEGLAB tutorial (Chapter 08: Plotting ERP images) that is located in the link:
>> http://sccn.ucsd.edu/wiki/Chapter_08:_Plotting_ERP_images
>>
>> Where there is a sentence"choose a channel with high alpha band power (near 10 Hz)" above the figure. and under the figure, there is another sentence "The plot above shows that alpha band power (e.g., at 10 Hz) is concentrated over the central occipital scalp".
>>
>> These two sentence lead me to ask: why alpha band is 10 Hz not between 8 and 13 Hz?
>>
>> Regards,
>> Jason
>>
>>>
>>>
>>> Makoto
>>>
>>> On Sat, Oct 3, 2015 at 2:14 AM, jason roger <jasonroger8 at gmail.com<mailto:jasonroger8 at gmail.com>> wrote:
>>>>
>>>> Hi all,
>>>>
>>>> To be sure form the information I have, in the attached file, there are 3 scalps are associated with three different frequencies (6 Hz, 10 Hz, and 22 Hz).
>>>>
>>>> ​
>>>>  example.png
>>>> ​
>>>>
>>>> Are those frequencies reflect the waves/bands Theta, Alpha, Beta consequently? In other words, if I'm interested studying Theta band, can I consider 6Hz to be its value, and 10Hz as a value of Alpha, while 22Hz for Beta?
>>>>
>>>> Thanks in advance.
>>>>
>>>> Jason
>>>>
>>>> _______________________________________________
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>>>
>>>
>>>
>>>
>>> --
>>> Makoto Miyakoshi
>>> Swartz Center for Computational Neuroscience
>>> Institute for Neural Computation, University of California San Diego
>>
>>
>
>
>
> --
> Makoto Miyakoshi
> Swartz Center for Computational Neuroscience
> Institute for Neural Computation, University of California San Diego
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