[FieldTrip] Question about minimum norm estimate pipeline
Stolk, A.
a.stolk at fcdonders.ru.nl
Fri May 31 08:11:23 CEST 2013
Hi Steve, A quick guess; did you correctly align your resliced mri to Talairach space by indicating the commissures ( http://imaging.mrc-cbu.cam.ac.uk/imaging/FindingCommissures ) and, if I'm correct, a point in the same place, e.g. between the hemispheres? This should update the transformation matrix. Best regards, Arjen ----- Oorspronkelijk bericht -----
> Van: "Stephen Politzer-Ahles" <politzerahless at gmail.com>
> Aan: fieldtrip at science.ru.nl
> Verzonden: Vrijdag 31 mei 2013 05:53:45
> Onderwerp: [FieldTrip] Question about minimum norm estimate pipeline
> Hello all,
> I have not yet gotten a response to my question below, but in the
> meantime I have another question about the minimum norm estimate
> workflow--specifically, about the coordinate system for the
> skull-stripped anatomy in the step described at
> http://fieldtrip.fcdonders.nl/tutorial/minimumnormestimate#preprocessing_of_the_anatomical_mrisave_to_disk
> . I'm confused by the following bit of code:
> % ensure that the skull-stripped anatomy is expressed in the same
> coordinate system as the anatomy
> seg.transform = mri_tal.transform;
> In my data, mri_tal.coordsys is 'spm' (I presume this is the result of
> re-aligning to Talairach in the previous step?) whereas seg.coordsys
> is 'ctf' (as a result of re-aligning to CTF several steps earlier).
> (But mri_tal also has a field mri_tal.transformorig, which seg does
> not have.) So should I really be using the same transform for both, as
> shown in the tutorial?
> Apologies if this question is pretty basic; I'm just trying to
> pinpoint where the mis-alignment described in my message below
> occurred, so I want to make sure I understand each step of the
> workflow correctly
> Best,
> Steve
> > Message: 1
> > Date: Sat, 25 May 2013 08:11:18 -0500
> > From: Stephen Politzer-Ahles < politzerahless at gmail.com >
> > To: fieldtrip at donders.ru.nl
> > Subject: [FieldTrip] Sourcespace and volume conductor misaligned
> > Message-ID:
> > <CAJT2k_9-hd_sM=hp4P-CUu+=aduSOMyZV7XPG0= fFk0ouR0wzA at mail.gmail.com
> > >
> > Content-Type: text/plain; charset="utf-8"
> >
> > Hello all,
> >
> > I am going through the workflow at
> > http://fieldtrip.fcdonders.nl/tutorial/minimumnormestimate . After
> > making
> > the volume conduction model using ft_prepare_headmodel(), I noticed
> > that
> > although the volume conduction model and sourcespace have the same
> > orientation and overall size/shape (after I converted the volume
> > conduction
> > model to cm, which wasn't in the tutorial but my original model came
> > out in
> > mm), they don't quite line up, as you can see in this figure:
> >
> > http://i.imgur.com/mGEtLOa.png
> >
> > I did interactively re-align the data to CTF (twice--in step 2 of
> > "Preprocessing of the anatomical MRI" and in step 4 of "Source
> > model")
> > using fiducials, and to Talairach (step 5 of "Preprocessing of the
> > anatomical data"), so I'm not sure how it ended up this way. The
> > code I've
> > used at each step is basically the same as that in the tutorial.
> >
> > Is there any way to line up my volume conduction model and
> > sourcespace now,
> > without going back and re-running most of the workflow?
> >
> > Best,
> > Steve
> >
> > --
> > Stephen Politzer-Ahles
> > University of Kansas
> > Linguistics Department
> > http://people.ku.edu/~sjpa/
> On Sat, May 25, 2013 at 1:56 PM, < fieldtrip-request at science.ru.nl >
> wrote:
> >
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> > than "Re: Contents of fieldtrip digest..."
> >
> >
> > Today's Topics:
> >
> > 1. Sourcespace and volume conductor misaligned
> > (Stephen Politzer-Ahles)
> > 2. Re: fieldtrip Digest, Vol 30, Issue 31 (Johanna Zumer)
> >
> >
> > ----------------------------------------------------------------------
> >
> > Message: 1
> > Date: Sat, 25 May 2013 08:11:18 -0500
> > From: Stephen Politzer-Ahles < politzerahless at gmail.com >
> > To: fieldtrip at donders.ru.nl
> > Subject: [FieldTrip] Sourcespace and volume conductor misaligned
> > Message-ID:
> > <CAJT2k_9-hd_sM=hp4P-CUu+=aduSOMyZV7XPG0= fFk0ouR0wzA at mail.gmail.com
> > >
> > Content-Type: text/plain; charset="utf-8"
> >
> > Hello all,
> >
> > I am going through the workflow at
> > http://fieldtrip.fcdonders.nl/tutorial/minimumnormestimate . After
> > making
> > the volume conduction model using ft_prepare_headmodel(), I noticed
> > that
> > although the volume conduction model and sourcespace have the same
> > orientation and overall size/shape (after I converted the volume
> > conduction
> > model to cm, which wasn't in the tutorial but my original model came
> > out in
> > mm), they don't quite line up, as you can see in this figure:
> >
> > http://i.imgur.com/mGEtLOa.png
> >
> > I did interactively re-align the data to CTF (twice--in step 2 of
> > "Preprocessing of the anatomical MRI" and in step 4 of "Source
> > model")
> > using fiducials, and to Talairach (step 5 of "Preprocessing of the
> > anatomical data"), so I'm not sure how it ended up this way. The
> > code I've
> > used at each step is basically the same as that in the tutorial.
> >
> > Is there any way to line up my volume conduction model and
> > sourcespace now,
> > without going back and re-running most of the workflow?
> >
> > Best,
> > Steve
> >
> > --
> > Stephen Politzer-Ahles
> > University of Kansas
> > Linguistics Department
> > http://people.ku.edu/~sjpa/
> > -------------- next part --------------
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> > >
> >
> > ------------------------------
> >
> > Message: 2
> > Date: Sat, 25 May 2013 20:54:59 +0200
> > From: Johanna Zumer < johanna.zumer at donders.ru.nl >
> > To: FieldTrip discussion list < fieldtrip at science.ru.nl >
> > Subject: Re: [FieldTrip] fieldtrip Digest, Vol 30, Issue 31
> > Message-ID:
> > <CAL4kA6eTL_TwECF62W-OoWY= Y1mpBR6QoOLh+ug8AcXNbVxQ1A at mail.gmail.com
> > >
> > Content-Type: text/plain; charset="utf-8"
> >
> > Dear Jing,
> >
> > 1. Every MRI scanner is different, so I'm not familiar with that
> > naming
> > scheme, but it seems the 'GAD' at the end of the file name indicates
> > that
> > was with the Gadolinium contrast agent, so I would suggest to not
> > use that,
> > but instead use the first (plain) T1.
> >
> > 2. I'm not sure what to suggest. I assume you can see the vitamin E
> > marker
> > clearly when viewing the DICOM file? Is the issue that some slices
> > are
> > missing in the conversion, or that the contrast on the image is not
> > the
> > same? or right/left flipped?
> >
> > Best,
> > Johanna
> >
> >
> > 2013/5/23 WangJing < 13681530640 at 139.com >
> >
> > > Dear Johanna,
> > >
> > > Thank you for your suggestion.
> > > 1.I have two folder of T1 MRI, one is t1_vibe_tra_4,and another is
> > > t1_vibe_traGAD-5. which one is best?
> > > 2.when I convert MRI from DICOM into CTF format,the vitamin E
> > > marker
> > > didn't be found. what can I do?
> > >
> > > Best Regards,
> > > Jing Wang
> > >
> > >
> > >
> > >
> > > ------------------------------
> > > ----The following is the content of the forwarded email----
> > > From?fieldtrip-request< fieldtrip-request at science.ru.nl >
> > > To?fieldtrip< fieldtrip at science.ru.nl >
> > > Date?2013-05-22 15:33:13
> > > Subject?fieldtrip Digest, Vol 30, Issue 31
> > >
> > > Send fieldtrip mailing list submissions to
> > > fieldtrip at science.ru.nl
> > >
> > > To subscribe or unsubscribe via the World Wide Web, visit
> > > http://mailman.science.ru.nl/mailman/listinfo/fieldtrip
> > > or, via email, send a message with subject or body 'help' to
> > > fieldtrip-request at science.ru.nl
> > >
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> > > fieldtrip-owner at science.ru.nl
> > >
> > > When replying, please edit your Subject line so it is more
> > > specific
> > > than "Re: Contents of fieldtrip digest..."
> > >
> > >
> > > Today's Topics:
> > >
> > > 1. Re: question About head model (Johanna Zumer)
> > >
> > >
> > > ----------------------------------------------------------------------
> > >
> > > Message: 1
> > > Date: Wed, 22 May 2013 09:30:17 +0200
> > > From: Johanna Zumer < johanna.zumer at donders.ru.nl >
> > > To: FieldTrip discussion list < fieldtrip at science.ru.nl >
> > > Subject: Re: [FieldTrip] question About head model
> > > Message-ID:
> > > <CAL4kA6fyA18h3eFkBKu0V5+y4eA1rCZuaf8UGTZ1=
> > > HsAS_X0-w at mail.gmail.com >
> > > Content-Type: text/plain; charset="utf-8"
> > >
> > > Dear Jing,
> > >
> > > It is best to use the T1 MRI rather than the other scans. To open
> > > a DICOM
> > > format file, you can try one of these options:
> > >
> > > % read the DICOM files
> > > mri = ft_read_mri('single_file_of_DICOM_series.IMA');
> > > % or use a graphical file selection[f, p] = uigetfile
> > > <
> > > http://www.mathworks.com/access/helpdesk/help/techdoc/ref/uigetfile.html
> > > >('*');
> > > mri = ft_read_mri(fullfile
> > > <
> > > http://www.mathworks.com/access/helpdesk/help/techdoc/ref/fullfile.html
> > > >(p,
> > > f));
> > >
> > >
> > > I copied the above from documentation on the FieldTrip wiki:
> > >
> > > http://fieldtrip.fcdonders.nl/faq/how_can_i_convert_an_anatomical_mri_from_dicom_into_ctf_format
> > >
> > >
> > > Then you can save the 'mri' into a *.mat file for future use with
> > > FieldTrip.
> > >
> > > Best regards,
> > > Johanna
> > >
> > >
> > > 2013/5/22 WangJing < 13681530640 at 139.com >
> > >
> > > > Hi
> > > > I am a freshman about field trip.
> > > > I am trying to build the forward model. but my mri data is
> > > > different from
> > > > the data in the tutorial. So I don't know how to bulid the head
> > > > model. I
> > > > use the date which is from the paper "Open Database of Epileptic
> > > > EEG with
> > > > MRI and Postoperational Assessment of Foci?a Real World
> > > > Verification for
> > > > the EEG Inverse Solutions", http://eeg.pl/epi
> > > . MRI recordings containing a
> > >
> > > > T1, T2 or fluid attenuated inversion recovery (FLAIR) weighted
> > > > brain scans
> > > > with morphologic substrate of the epilepsy (mostly cortical
> > > > dysplasias,
> > > > dysplastic tumors etc.). In some cases there is also a scan with
> > > > the
> > >
> > > > gadolinium (GAD) contrast. The images were collected by Siemens
> > > > Sonata 1.5T
> > > > scanner. The data is stored in the Digital Imaging and
> > > > Communications in
> > > > Medicine (DICOM) format. The name of the scan?s folder indicates
> > > > its
> > > > weighting.The scans have the following resolutions: T1: 512 ?
> > > > 512 pixels,
> > > > pixel spacing 0.4687 mm, slice thickness 1.2 mm, T2: 256 ? 256
> > > > pixels,
> > > > pixel spacing 0.9375 mm,slice thickness 2.5 mm.
> > >
> > > > In the tutorial,the mri data stored in only one file, while the
> > > > data which
> > >
> > > > I used have many files, I don't know how to process. who can
> > > > help me,Thanks1
> > > > Thanks very much!
> > > > Best Reagards
> > > > Jing Wang
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > ------------------------------
> > > > ----The following is the content of the forwarded email----
> > > > From?fieldtrip-request< fieldtrip-request at science.ru.nl >
> > > > To?fieldtrip< fieldtrip at science.ru.nl >
> > > > Date?2013-05-21 23:59:18
> > > > Subject?fieldtrip Digest, Vol 30, Issue 29
> > > >
> > > > Send fieldtrip mailing list submissions to
> > > > fieldtrip at science.ru.nl
> > > >
> > > > To subscribe or unsubscribe via the World Wide Web, visit
> > > > http://mailman.science.ru.nl/mailman/listinfo/fieldtrip
> > > > or, via email, send a message with subject or body 'help' to
> > > > fieldtrip-request at science.ru.nl
> > > >
> > > > You can reach the person managing the list at
> > > > fieldtrip-owner at science.ru.nl
> > > >
> > > > When replying, please edit your Subject line so it is more
> > > > specific
> > > > than "Re: Contents of fieldtrip digest..."
> > > >
> > > >
> > > > Today's Topics:
> > > >
> > > > 1. Re: problem in connectivityanalysis (Gabriel Gonzalez
> > > > Escamilla)
> > > >
> > > >
> > > > ----------------------------------------------------------------------
> > > >
> > > > Message: 1
> > > > Date: Tue, 21 May 2013 17:52:21 +0200
> > > > From: Gabriel Gonzalez Escamilla < ggonesc at upo.es >
> > > > To: FieldTrip discussion list < fieldtrip at science.ru.nl >
> > > > Subject: Re: [FieldTrip] problem in connectivityanalysis
> > > > Message-ID: < 1348f6433edc26f9.519bb455 at upo.es >
> > > > Content-Type: text/plain; charset="iso-8859-1"
> > > >
> > > > Thank you so much for your answer J?rn,
> > > >
> > > >
> > >
> > > > Now I got it, so, I will let the 'fourier' as input to
> > > > ft_connectivityanalysis, because for some indices I will need
> > > > the auto-spectrum, and if I fully undertood what you said, it
> > > > will be the same, as they always take the phase information from
> > > > the fourier transform. And fieltrip will automatically compute
> > > > the csd if the input is the frequency data.
> > > >
> > > >
> > >
> > > > Nevertheless, it give me some error when I tried to use the
> > > > output from 'powandcsd' of freqanalysis, always gives me a
> > > > matrix dimensions error, and when I use the output 'fourier'
> > > > from connectivityanalysis, it computes almost all indices to ok,
> > > > raging from? -1 to 1 (I'm saw that they are signed, so this is
> > > > ok), the problem are the ImC ranging from -inf to inf, and the
> > > > PLV values ranging from 0 to inf, but when I use the 'fourier'
> > > > the values are. Which for me is really weird.
> > > >
> > > >
> > > >
> > >
> > > > I have checked internally, and even when I always use the
> > > > 'fourier' as input, when it internally calculates cross-spectrum
> > > > for the ImC and PLV, the data.crsspctrm is different, e.g:
> > > > data.dimord = 'rpt_rpt_chan_chan_freq'
> > > > ans size(data.crsspctrm) = [1 7 59 59];
> > > >
> > >
> > > > So, both are apparently the same, but the data inside this
> > > > matrices is different,
> > > >
> > > >
> > >
> > > > for example, when calculating the ImC the first 7 columns for
> > > > the first two rows are:
> > > > val(:,:,1,1)
> > > > ?[0.9323? 0.3679? 0.8629? 1.6436? 0.6404? 1.8782? 0.1139]
> > > > val(:,:,1,2)
> > > >
> > >
> > > > ?[0.8509-0.1555i? 0.2507-0.1066i? 0.8173-0.0290i?
> > > > 1.4328-0.2427i? 0.5457-0.0500i? 1.6505-0.0161i? 0.0993+0.0016i]
> > > >
> > > > while when calculating the PLV are:
> > > > val(:,:,1,1)
> > > > ?[1? 1? 1? 1? 1? 1? 1]
> > > > val(:,:,1,2)
> > > >
> > >
> > > > ?[0.9694-0.2133i? 0.7011-0.3564i? 0.9951-0.0104i?
> > > > 0.9014-0.3481i? 0.9781-0.0819i? 0.9982-0.0046i? 0.9507-0.0483i]
> > > >
> > > >
> > > >
> > >
> > > > I'm pretty sure I'm doing something wrong here, but I don't
> > > > really have a clue,
> > > >
> > > >
> > >
> > > > If I use the fourier transform to calculate the 'csd' in
> > > > ft_connectivity analysis and use this csd as input to all other
> > > > ft_connectivityanalysis indices all of them are set to NaN or 1,
> > > > not ranging between any numbers.
> > > >
> > > >
> > > >
> > > >
> > > >
> > >
> > > > On the other hand, I have seen searching on the net, that
> > > > fieltrip is capable of create surrogate data, by shifting the
> > > > phase information on every trial for only one electrode of each
> > > > pair while using the original samples of each trials on the
> > > > second channel, but I couldn't find on the manual how to do such
> > > > a thing. Is there any way to compute this kind of surrogates for
> > > > every sensor? or was it something that some one suggest to
> > > > somebody?
> > > >
> > > >
> > > > Many thanks in advanced,
> > > > Gabriel.
> > > >
> > > >
> > > >
> > > >
> > > > ----- Mensaje original -----
> > > > De: "J?rn M. Horschig" < jm.horschig at donders.ru.nl >
> > > > Fecha: Martes, 21 de Mayo de 2013, 9:03 am
> > > > Asunto: Re: [FieldTrip] problem in connectivityanalysis
> > > > A: FieldTrip discussion list < fieldtrip at science.ru.nl >
> > > >
> > > >
> > > >
> > > >
> > > >
> > > > > Dear Gabriel,
> > > > >
> > > >
> > >
> > > > > A) As you see, this makes an average over the epochs of each
> > > > > channel, and not over the samples (which in this case are the
> > > > > 9 frequencies of the FFT), And I would like to have the
> > > > > opposite, this is, to get the imaginary part of coherence for
> > > > > each epoch (repetition) on all my channels and not for each
> > > > > frequency, something like: chan_chan_rpt or chancbm_rpt, Is
> > > > > this possible?
> > > > >
> > > >
> > >
> > > > > No. You should think of coherence more as a measure for the
> > > > > consistency of the phase relation between channels across
> > > > > trials, so coherence is just not defined per trial,neither
> > > > > would it make sense to compute coherence for a single trial.
> > > > >
> > > >
> > >
> > > > > B) Another question I have is: for the Imaginary part of
> > > > > Coherence is not necessary to compute the cross-spectrum with
> > > > > 'powandcsd', only the FFT, but for the PLV, PPC or WPLI is
> > > > > that way too? I see some terminology issues here. Let me try
> > > > > to explain in a simple (aka least-mathematical I can think of)
> > > > > way:
> > > > >
> > > >
> > >
> > > > > For all these connectivity measures, we need the phase
> > > > > information from the Fourier transform (FFT) to compute the
> > > > > cross-spectral density matrix (CSD). The CSD can be regarded
> > > > > as the equivalent in the frequency domain to the covariance
> > > > > matrix in the time domain, thus it is a measures how a certain
> > > > > channels activity is co-modulated with another channels
> > > > > activity (for a particular frequency) - makes pretty much
> > > > > sense to make use of this when computing connectivity, right?
> > > > > :)
> > > >
> > >
> > > > > As you might know, a Fourier transform returns complex
> > > > > numbers, where the imaginary part of this number contains
> > > > > phase information. When calling ft_freqanalysis, you can
> > > > > decide if it shall only return the (squared) real part of the
> > > > > frequency spectrum (cfg.output='pow'), or instead the full CSD
> > > > > (cfg.output = 'powandcsd'). Alternatively, you can also let
> > > > > ft_freqanalysis return the raw Fourier coefficients
> > > > > (cfg.output='fourier'). From the Fourier coefficients,
> > > > > however, you can easily obtain the CSD or the power spectrum
> > > > > basically by multiplication the Fourier matrix with itself
> > > > > (transposed). All of these measures quantify the phase
> > > > > relation between channels across trials, and as phase
> > > > > information is coded in the imaginary part of the fourier
> > > > > output, thus for connectivityanalysis you need the CSD which
> > > > > can be obtained either by 'powandcsd' or by 'fourier'.
> > > > >
> > > > > I hope that somehow clarifies your questions.
> > > > >
> > > > > Best,
> > > > > J?rn
> > > > >
> > > > > On 5/17/2013 5:45 PM, Gabriel Gonzalez Escamilla wrote:
> > > > > Dear Fieltrip experts,
> > > > >
> > > >
> > >
> > > > > I have my continuous data imported to fieldtrip with matlab,
> > > > > I'm looking for performing connectivity analysis between pairs
> > > > > of sensors, I have succed as:
> > > >
> > >
> > > > > data.trials {1xNepochs}; % Nepochs = 7, each epoch with 59
> > > > > channels and 2000 samples
> > > > > data.label {59x1};
> > > > > data.time {1xNepochs};
> > > > >
> > > > > then, calculate only the FFT of all sensors as:
> > > > > cfg=[];
> > > > > cfg.output='fourier';
> > > > > cfg.method='mtmfft';
> > > > > cfg.taper='hanning';
> > > > > cfg.foilim=[8.5 9.5];
> > > > > cfg.tapsmofrq=0;
> > > > > cfg.trials='all';
> > > > > cfg.keeptrials='yes';
> > > > > cfg.channel='all';
> > > > > fourier=ft_freqanalysis(cfg, data)
> > > > > as output I get:
> > > > > dimord = 'rpttap_chan_freq'
> > > > > freq= [1x9]
> > > > > fourierspctrm=[7x59x9 double]
> > > > >
> > > > > Then compute the imaginary part of coherency as:
> > > > > cfg=[];
> > > > > cfg.method ='cohe';
> > > > > cfg.complex='imag';
> > > > > cfg.channelcbm={'all' 'all'};
> > > > > coher = ft_connectivityanalysis (cfg, fourier)
> > > > > as output get:
> > > > > dimord='chan_chan_freq';
> > > > > cohspctrm=[59x59x9 double];
> > > > > dof=7;
> > > > >
> > > > > I have two main questions:
> > > > >
> > > >
> > >
> > > > > A) As you see, this makes an average over the epochs of each
> > > > > channel, and not over the samples (which in this case are the
> > > > > 9 frequencies of the FFT), And I would like to have the
> > > > > opposite, this is, to get the imaginary part of coherence for
> > > > > each epoch (repetition) on all my channels and not for each
> > > > > frequency, something like: chan_chan_rpt or chancbm_rpt, Is
> > > > > this possible?
> > > > >
> > > > >
> > > > >
> > > >
> > >
> > > > > B) Another question I have is: for the Imaginary part of
> > > > > Coherence is not necessary to compute the cross-spectrum with
> > > > > 'powandcsd', only the FFT, but for the PLV, PPC or WPLI is
> > > > > that way too?
> > > > >
> > > > >
> > > > >
> > > > >
> > > > > Many thanks in advanced,
> > > > > Gabriel.
> > > > >
> > > > >
> > > > >
> > > >
> > >
> > > > > _______________________________________________ > fieldtrip
> > > > > mailing list >
> > > > fieldtrip at donders.ru.nl
> > > > http://mailman.science.ru.nl/mailman/listinfo/fieldtrip
> > > > >
> > > >
> > >
> > > > > -- > J?rn M. Horschig > PhD Student > Donders Institute for
> > > > > Brain, Cognition and Behaviour > Centre for Cognitive
> > > > > Neuroimaging > Radboud University Nijmegen > Neuronal
> > > > > Oscillations Group > FieldTrip Development Team > > P.O. Box
> > > > > 9101 > NL-6500 HB Nijmegen > The Netherlands > > Contact: >
> > > > > E-Mail:
> > > > jm.horschig at donders.ru.nl > Tel: +31-(0)24-36-68493 > Web:
> > > > http://www.ru.nl/donders
> > >
> > > > > > Visiting address: > Trigon, room 2.30 > Kapittelweg 29 >
> > > > > > NL-6525 EN Nijmegen > The Netherlands >
> > > > > > _______________________________________________
> > > > > fieldtrip mailing list
> > > > > fieldtrip at donders.ru.nl
> > > > > http://mailman.science.ru.nl/mailman/listinfo/fieldtrip
> > > >
> > > >
> > >
> > > > <font size="3">--------------------------<br />PhD. student
> > > > Gabriel Gonz?lez-Escamilla<br />Laboratory of Functional
> > > > Neuroscience<br />Department of Physiology, Anatomy, and Cell
> > > > Biology<br />University Pablo de Olavide<br />Ctra. de Utrera,
> > > > Km.1<br />41013 - Seville<br />- Spain -<br /><br />Email:
> > > > ggonesc at upo.es <br /> http://www.upo.es/neuroaging/es/ </font>
> > > >
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> > > > ------------------------------
> > > >
> > > > _______________________________________________
> > > > fieldtrip mailing list
> > > > fieldtrip at donders.ru.nl
> > > > http://mailman.science.ru.nl/mailman/listinfo/fieldtrip
> > > >
> > > > End of fieldtrip Digest, Vol 30, Issue 29
> > > > *****************************************
> > > >
> > > > _______________________________________________
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> > > ------------------------------
> > >
> > > _______________________________________________
> > > fieldtrip mailing list
> > > fieldtrip at donders.ru.nl
> > > http://mailman.science.ru.nl/mailman/listinfo/fieldtrip
> > >
> > > End of fieldtrip Digest, Vol 30, Issue 31
> > > *****************************************
> > >
> > > _______________________________________________
> > > fieldtrip mailing list
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> > > http://mailman.science.ru.nl/mailman/listinfo/fieldtrip
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> > ------------------------------
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> > _______________________________________________
> > fieldtrip mailing list
> > fieldtrip at donders.ru.nl
> > http://mailman.science.ru.nl/mailman/listinfo/fieldtrip
> >
> > End of fieldtrip Digest, Vol 30, Issue 36
> > *****************************************
> --
> Stephen Politzer-Ahles
> University of Kansas
> Linguistics Department
> http://people.ku.edu/~sjpa/
> _______________________________________________
> fieldtrip mailing list
> fieldtrip at donders.ru.nl
> http://mailman.science.ru.nl/mailman/listinfo/fieldtrip
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