Re: Status EEG problems/techniques?

Mikkel C. Vinding, Mads Jensen, Morten Overgaard, Distinct
electrophysiological potentials for intention in action and prior
intention for action, Cortex, Available online 19 September 2013, ISSN
0010-9452, http://dx.doi.org/10.1016/j.cortex.2013.09.001.
(http://www.sciencedirect.com/science/article/pii/S0010945213002347)
Abstract: Abstract
The role of conscious intention in relation to motoric movements has
become a major topic of investigation in neuroscience. Traditionally,
reports of conscious intention have been compared to various features
of the readiness-potential (RP) – an electrophysiological signal that
appears before voluntary movements. Experiments, however, tend to
study intentions in immediate relation to movements (proximal
intentions), thus ignoring other aspects of intentions such as
planning or deciding in advance of movement (distal intentions). The
current study examines the difference in electrophysiological activity
between proximal intention and distal intention, using
electroencephalography (EEG). Participants had to form an intention to
move and then wait 2.5 sec before performing the actual movement. In
this way, the electrophysiological activity related to forming a
conscious intention was separated from any confounding activity
related to automated motor activity. This was compared to conditions
in which participants had to act as soon as they had the intention and
a condition where participants acted upon an external cue 2.5 sec
prior to movement. We examined the RP for the three conditions. No
difference was found in early RP, but late RP differed significantly
depending on the type of intention. In addition, we analysed signals
during a longer time-interval starting before the time of distal
intention formation until after the actual movement concluded. Results
showed a slow negative electrophysiological “intention potential”
above the mid-frontal areas at the time participants formed a distal
intention. This potential was only found when the distal intention was
self-paced and not when the intention was formed in response to an
external cue.



On Tue, Nov 5, 2013 at 3:09 PM, Ivan <[email protected]> wrote:

>
>
> Begin forwarded message:
>
> Date: Tue, 5 Nov 2013 15:45:51 +0200
> From: Ivan <[email protected]>
> To: [email protected]
> Subject: Re: [Openeeg-list] Status EEG problems/techniques?
>
>
>
> http://www.google.ee/url?sa=t&rct=j&q=&esrc=s&source=web&cd=5&cad=rja&ved=0CEoQFjAE&url=http%3A%2F%2Frecpat-bci.googlecode.com%2Fsvn%2Fdocu%2FEEGreckon.pdf&ei=QvN4Up2qO8qJ4gTcoIDwDA&usg=AFQjCNFDYYTPd0UzK8wxkc0x4giVl14zBg&sig2=KsBAx-DGMoo6_qW6kGsmXA&bvm=bv.55980276,d.bGE
> -Would be one such document on motor intention. Although they use more
> channels than 2.
> On Sun, 3 Nov 2013 11:29:59 -0800
> Makorihi <[email protected]> wrote:
>
> > Hey all,
> >
> > I have heard about EEG throughout my life and I find it to be extremely
> > interesting and have a wide range of implications if the technology
> > advances further, but I realize that I have no knowledge as to the
> details
> > of problems and hurdles people are facing in the field. I was hoping that
> > someone on this list would have enough knowledge about this field to
> answer
> > some of my questions or at least send me in the right direction.
> >
> > For one, I know that both the hardware and software have their own
> issues.
> > Various different types of electrodes exist as well as different methods
> of
> > amplifying the signals in preparation for processing. I'm not as
> interested
> > in the hardware as I am in the 'software', or more accurately the methods
> > used to transform these voltages from signal domain into other spaces
> (such
> > as inferring complex 'actions' or decoding sight).
> >
> > What I am really wondering is how far have we come in this respect? Of
> > course there are well known products such as Emotiv, but I am more
> > interested in tackling the problem and coming up with a better solution
> > than just buying some premade device. An in order to do so, I feel like I
> > need some background knowledge and need to know where we stand today. I
> was
> > hoping you guys could help me out with that!
> >
> > Just as a start, are there any papers in temporal correlation of
> different
> > regions of the brain with respect to intention to action? The closest
> thing
> > I have found to that is 'Detection of self-paced reaching movement
> > intention from EEG signals' by Eileen Lew et all. (
> > http://infoscience.epfl.ch/record/178379/files/LewChSiMi12.pdf) But
> sadly,
> > they did not tackle the particular thing I am interested in.
> >
> > Best Regards,
> > Jay
>
>
> --
> Ivan <[email protected]>
>
>
> --
> Ivan <[email protected]>
>
>
> ------------------------------------------------------------------------------
> November Webinars for C, C++, Fortran Developers
> Accelerate application performance with scalable programming models.
> Explore
> techniques for threading, error checking, porting, and tuning. Get the most
> from the latest Intel processors and coprocessors. See abstracts and
> register
> http://pubads.g.doubleclick.net/gampad/clk?id=60136231&iu=/4140/ostg.clktrk
> _______________________________________________
> Openeeg-list mailing list
> [email protected]
> https://lists.sourceforge.net/lists/listinfo/openeeg-list
> Go to the above address to change your
> subscription options, e.g unsubscribe.
>

------------------------------------------------------------------------------
November Webinars for C, C++, Fortran Developers
Accelerate application performance with scalable programming models. Explore
techniques for threading, error checking, porting, and tuning. Get the most 
from the latest Intel processors and coprocessors. See abstracts and register
http://pubads.g.doubleclick.net/gampad/clk?id=60136231&iu=/4140/ostg.clktrk