- ynic-users

by rem

Dear Users This Thursday (24th April) there will be a seminar at YNiC from 4-5 pm about "Hyperpolarised gas MR physics and engineering". The speaker is Dr. Jim Wild from the University of Sheffield: http://www.shef.ac.uk/medicine/staff/wild.html All are welcome and drinks will be available afterwards. Best wishes Rebecca -- ************************************************************************ Dr. Rebecca E. Millman Science Liaison Officer York Neuroimaging Centre The Biocentre York Science Park Heslington YO10 5DG Tel: +44 (0) 1904 567614 Fax: +44 (0) 1904 435356

17 years

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[Fwd: REMINDER- PENS Training Center “Imaging Brain Function: From Synapses to Networks” - Deadline approaching]

by Gary Green

<http://fens.org> <http://fens.mdc-berlin.de/> */Federation of European Neuroscience Societies/* ............................................................................................................................................................................................... ------------------------------------------------------------------------ ................................................................................................................................................................................................ *FENS Office Berlin* Max Delbrück Center for Molecular Medicine (MDC) Berlin-Buch Robert-Rössle-Str. 10 13092 Berlin Tel.: +49 30 9406 3336 Fax: +49 30 9406 3819 e-mail: gibson(a)mdc-berlin.de <mailto:gibson@mdc-berlin.de>, a.buchheister(a)mdc-berlin.de <mailto:a.buchheister@mdc-berlin.de> <http://mars.glia.mdc-berlin.de/pens/> <http://fens.mdc-berlin.de/pens/> <http://www.ibro.info/> .......................................................................................................................................................................................... * PENS Training Center *Imaging Brain Function: From Synapses to Networks* * * **This is to remind you that the **PENS Training Center**: * *Imaging Brain Function: From Synapses to Networks <http://fens.mdc-berlin.de/pens/2008/schools/lausanne/>* ** *invites student applications. The School will be held in Lausanne and Geneva, **Switzerland**, from **September 7-27, 2008** * *The deadline for application is **April 15, 2008**.* *For more* *information and application please contact*: http://fens.org/pens/2008/schools/lausanne/ ................................................................................................................................................................................................. *FENS OFFICE BERLIN* Max Delbrück Center for Molecular Medicine (MDC) Berlin-Buch, Robert-Rössle-Str. 10, D-13092 Berlin Tel.: +49 30 9406 3336, Fax: +49 30 9406 3819 e-mail: a.buchheister(a)mdc-berlin.de <mailto:a.buchheister@mdc-berlin.de>

17 years, 1 month

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YNiC ASC - March 27th - Auditory fMRI

by Michael Simpson

Dear all, this is just a reminder of the YNiC ASC tomorrow, which Quentin Summerfield will be chairing, on the subject of Auditory fMRI. It will take place in Psychology B020 at 4.30pm Thursday 27th March. The agenda will be as follows: * Rebecca Millman will start the session with a presentation on Safety and Practical Issues relating to Auditory fMRI. * Quentin Summerfield will then make a presentation on his previous experiences of fMRI at Nottingham. * Andre Gouws will then make a presentation about Technical Issues relating to Auditory fMRI. * A discussion about possible ways forward in York will follow. Thanks, Michael -- Dr Michael Simpson Science Liaison Officer York Neuroimaging Centre Innovation Way York YO10 5DG Tel: 01904 567614 Web: http://www.ynic.york.ac.uk

17 years, 1 month

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[Fwd: [Eeglablist] MBL Neuroinformatics 2008]

by Gary Green

Dear Colleagues FYI Gary -------- Original Message -------- Subject: [Eeglablist] MBL Neuroinformatics 2008 Date: Tue, 18 Mar 2008 17:38:06 -0700 (PDT) From: Diane Whitmer <dwhitmer(a)biomail.ucsd.edu> To: eeglablist(a)sccn.ucsd.edu ---------- Forwarded message ---------- Date: Tue, 18 Mar 2008 09:51:06 -0400 From: Catherine Hemmerdinger <catherineh(a)mbl.edu> To: catherineh(a)mbl.edu Subject: Neuroinformatics 2008 This is a gentle reminder follow-up e-mail to the e-mail copied below. Thanks for your help. We write to inform you of the opportunity for your graduate students, post-docs and colleagues to participate in the MBL special topics course "Neuroinformatics" , described at the link below, devoted to neuronal data analysis and modeling with an emphasis on signal processing and statistics. This course attracts leaders in the field to teach a unique and intensive schedule. In addition, faculty and students have numerous opportunities for informal discussion and to analyze real data sets. We believe that the educational experience and the ability to network with leading scientists from many institutions, provided by this course, is not available at any single home institution. Substantial financial aid is available to defray the cost of tuition. Neuroinformatics Course Dates: August 16 - 31, 2008 Directors: Partha Mitra, Cold Spring Harbor Laboratory David Kleinfeld. UC San Diego Location: Marine Biological Laboratory, Woods Hole MA * Application Deadline: April 11, 2008 * http://www.mbl.edu/education/courses/special_topics/neufo.html This course contains pedagogical lectures on basic statistical techniques as well as focussed mini-workshops on specific neuroscience topics where applications of these techniques are critical. Thank you in advance for passing on this information. Based on comments from alumni this educational experience has had a profound effect on their scientific career. Sincerely, Partha Mitra David Kleinfeld VISIT OUR WEB SITE: http://www.mbl.edu/education/ -- Catherine Hemmerdinger Assistant to the Director of Education Marine Biological Laboratory 7 MBL Street Woods Hole, MA 02543 tel: (508) 289-7340 fax: (508) 289-7931 e-mail: catherineh(a)mbl.edu _______________________________________________ Eeglablist page: http://sccn.ucsd.edu/eeglab/eeglabmail.html To unsubscribe, send an empty email to eeglablist-unsubscribe(a)sccn.ucsd.edu For digest mode, send an email with the subject "set digest mime" to eeglablist-request(a)sccn.ucsd.edu -- Gary Green York Neuroimaging Centre The Biocentre York Science Park Innovation Way Heslington York YO10 5DG http://www.ynic.york.ac.uk tel. 01904 435349 fax 01904 435356 mobile 07986 778954

17 years, 1 month

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Back on

by Andy Ellis

Contrary to my previous email, I will be practising my EPS talk tomorrow (Tuesday) at 4.30 in YNiC. 'The neural basis of the right visual field advantage for visual word recognition' by Ellis, Barca, Cornelissen, Simpson, Urooj and Woods. Andy -- Professor Andy Ellis Department of Psychology University of York York YO10 5DD England Tel. +44 (0)1904 433140 http://www.york.ac.uk/depts/psych/www/people/biogs/awe1.html

17 years, 1 month

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Angel Nevado's leaving dinner

by Gary Green

Dear Colleagues Angel Nevado will be leaving soon to take up a position in Madrid. To celebrate his success in obtaining his prestigious new position and to thank him for all of his contributions whilst he has been working in York, there will be celebratory drinks and a dinner on Wednesday evening. Drinks will be served at YNiC from 5pm on Wednesday. The dinner will be at the ASK restaurant at about 8pm that same evening. If you wish to attend, please email me Gary -- Gary Green York Neuroimaging Centre The Biocentre York Science Park Innovation Way Heslington York YO10 5DG http://www.ynic.york.ac.uk tel. 01904 435349 fax 01904 435356 mobile 07986 778954

17 years, 1 month

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seminar today at YNiC

by Gary Green

Dear colleagues Today there will be a new project presentation by Cindy Hagan on 'Crossmodal Integration of Tone of Voice' 4pm, YNiC Open Plan area New project proposal seminars are an opportunity to contribute to the design and implementation of the science programme at YNiC. Users are required to make a presentation as part of the application process. All welcome Refreshments wil be provided ------------- The next seminar will be 'The neural basis of the right visual field advantage for word recognition' by Andy Ellis, Laura Barca, Piers Cornelissen, Michael Simpson, Uzma Urooj & Will Woods on Tuesday the 18th of March at 4.30pm in the YNiC open plan area All welcome Refreshments will be provided -- Gary Green York Neuroimaging Centre The Biocentre York Science Park Innovation Way Heslington York YO10 5DG http://www.ynic.york.ac.uk tel. 01904 435349 fax 01904 435356 mobile 07986 778954

17 years, 2 months

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[Fwd: CVPR group seminar on 12th March, Wednesday in Computer Science Dept.]

by Gary Green

Dear colleagues, We will have a seminar on next wednesday, 12th March about medical image analysis by Dr. Lee Harrison, UCL. We would like to invite you and your group members to join the seminar. The detail of the seminar is as follows. Please could you circulate this email to your group members, and we welcome every one to join the seminar. Best regards, Fan Zhang Computer Vision and Pattern Recognition Group, Computer Science Department, University of York, UK ----------------------------------------------------------------------------------------------------------------------------- Lee Harrison (University College London) Title: "Spatial models of functional magnetic resonance images" 11:15AM - 12:30AM, 12th March, Wednesday in Room CS103, Computer Science Building ----------------------------------------------------------------------------------------------------------------------------- "I will talk about Bayesian spatial models of fMRI time-series data. In particular, we use a weighted graph Laplacian (WGL) to partition a brain volume into computationally manageable segments, using an isoperimetric partitioning algorithm (Grady 2006). Data from each segment is then entered into a 2-level general linear model (GLM) with matrix-variate normal densities over likelihood and prior at the 1st and 2nd levels. The spatial covariance matrix of the prior over voxels is given by the heat kernel of a WGL and all parameters and hyperparameters e.g. controlling dispersion of the heat kernel, are optimized using an EM algorithm with Fisher-Scoring ascent scheme. The benefits of this approach are that GLM parameters have an explicit and (generally) non-stationary spatial model. This allows formal model comparison of different hypotheses about how data are generated, e.g. from a stationary or non-stationary spatial process." -- Gary Green York Neuroimaging Centre The Biocentre York Science Park Innovation Way Heslington York YO10 5DG http://www.ynic.york.ac.uk tel. 01904 435349 fax 01904 435356 mobile 07986 778954

17 years, 2 months

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ASK - AUDITORY fMRI at YNiC - 27th of March

by Andre Gouws

Dear colleagues, _Auditory stimulus delivery in fMRI._ This ASK session will be held at 4:30 pm on Thursday the 27th of March. This is a change from the original scheduling of Wednesday the 19th of March. We will confirm the venue, but hope to host the session in B020 as before. Remember that these sessions are intended to be a forum where you can air your concerns, share your expertise and request a wish list for solutions to be provided at (not necessarily by!) YNiC. We hope to see you there. Regards, Andre' ************************************************************************ Andre Gouws User Support Manager York Neuroimaging Centre The Biocentre York Science Park Heslington YO10 5DG Tel: +44 (0) 1904 435328 Fax: +44 (0) 1904 435356

17 years, 2 months

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Brain awareness week

by Gary Green

Welcome to 'Brain Awareness Week 2008'! - an annual opportunity for neuroscientists across the globe to focus on celebrating and communicating progress in brain science to the public. Coordinated in the UK by the European Dana Alliance for the Brain (www.edab.net <http://www.edab.net/> ), one of the events is... ---- National Brain Science Writing Prize 2008. In collaboration with EDAB, At-Bristol and Focus magazine, the BNA is launching a competition this week to find the best brain communicators. Could you write a newspaper-style article celebrating the amazing world of brain science? To find out more, contact: www.youramazingbrain.org <http://www.youramazingbrain.org/> . Closing date for entries: 30th June, 2008. -- Gary Green York Neuroimaging Centre The Biocentre York Science Park York YO10 5DG tel (+44) (0) 1904 435349 fax (+44) (0) 1904 435356 mobile 07986778954

17 years, 2 months

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YNiC today

by Gary Green

Dear colleagues Last week we held a YNiC Thursday seminar on using Unix on the Macs. The attendance was quite low suggesting that Users probably had enough knowledge on this topic for them to be able to do what they needed at that level of computing. The original idea was that the session would continue this week but as we have had apologies even from those who had attended last week, it seems that we should not hold today's seminar. So, NO seminar today. Next week there will be a new project presentation, 4pm, Thursday the 13th, YNiC open plan. All welcome Gary -- Gary Green York Neuroimaging Centre The Biocentre York Science Park Innovation Way Heslington York YO10 5DG http://www.ynic.york.ac.uk tel. 01904 435349 fax 01904 435356 mobile 07986 778954

17 years, 2 months

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URGENT : Scratch space

by Gary Green

Dear colleagues As you know we have been encouraging users to use their 'scratch' disc space for temporary files and as a workspace for intermediate analysis. We monitor the total usage of this space daily and it is growing very rapidly. We predict that this space will run out in a few days if we do not act. The majority of the usage is by just a few users but, please, if you have a large amount of data/information in scratch, can you look at it and endeavour to delete anything that is redundant. If we do not do this then the systems will fail. One way of getting around these problems is to use a group space for your project. Group scratch is not used much and is an efficient way of sharing information without it having to be duplicated by each user, within a group, in their own scratch space. If your project does not have a group scratch directory then please email it-support(a)ynic.york.ac.uk thanks Gary -- Gary Green York Neuroimaging Centre The Biocentre York Science Park Innovation Way Heslington York YO10 5DG http://www.ynic.york.ac.uk tel. 01904 435349 fax 01904 435356 mobile 07986 778954

17 years, 2 months

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MEG now available

by Gary Green

Dear Colleagues MEG is now up and running again. You can now book your MEG sessions again through Claire. It looks as though the Polhemus failed due to a fault in an serial line isolator. So the whole system failed due to a £5 component. Sorry! While we were waiting for a delivery of a new Polhemus system and the engineeer, the YNiC team took the opportunity to reorganise the MEG equipment room. The equipment and cables have been tidied, labelled and organised. Please do not change anything in the equipment room as there is now actually no need to change cables or equipment. The camera has also been moved in the MSR (magnetically shielded room) and it is now possible to monitor your subjects during an experiment even if you are using the large screen. Please remember to tell your subjects that they are being monitored. Happy MEGing Gary -- Gary Green York Neuroimaging Centre The Biocentre York Science Park Innovation Way Heslington York YO10 5DG http://www.ynic.york.ac.uk tel. 01904 435349 fax 01904 435356 mobile 07986 778954

17 years, 2 months

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Today at YNiC

by Gary Green

Dear colleagues Today we are being visited by the VC, the pro-VC for research and Sir David Cooksey. David Cooksey wrote the recent government report on medical research which has resulted in the setting up of the National Institute of Medical Research and the integration of the NHS R&D programme with the MRC. His current main interests are concerned with translational research. If ...., you were thinking of visiting YNiC yourself today then it would help us if you happened to be present in open plan between 1.30 and 2.15 with some interesting images on the screen. If anyone is doing experiments within MRI or MEG then please be prepared to have visitors ask some questions about what you are doing. Of course I cannot predict if they will visit, whether they will be on time or whether they will actually stop as we walk through open plan. thank you Gary -- Gary Green York Neuroimaging Centre The Biocentre York Science Park York YO10 5DG tel (+44) (0) 1904 435349 fax (+44) (0) 1904 435356 mobile 07986778954

17 years, 2 months

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[Fwd: [SPM] UCLA Advanced Neuroimaging Summer School]

by Gary Green

FYI We are now accepting applications for the 2008 UCLA Advanced Neuroimaging Summer School, to be help July 14-25, 2008 in Los Angeles, CA. For more information and to apply for the course, please visit: http://www.poldracklab.org/nitp2008 Cheers, Russ --- Russell A. Poldrack, Ph.d. Associate Professor Wendell Jeffrey and Bernice Wenzel Term Chair in Behavioral Neuroscience UCLA Department of Psychology Franz Hall, Box 951563 Los Angeles, CA 90095-1563 phone: 310-794-1224 fax: 310-206-5895 email: poldrack(a)ucla.edu web: www.poldracklab.org

17 years, 2 months

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YNiC ASC - March 19th - Auditory fMRI

by Michael Simpson

Dear all, this is just a quick mailing to advertise a YNiC ASC on March 19th. It will be on the subject of Auditory fMRI, and will be chaired by Quentin Summerfield. Should you want to contribute anything to the agenda, please email Quentin in advance <aqs1(a)york.ac.uk>. Otherwise, simply come along and join in the discussion. As before, a short digest of the YNiC ASC will be emailed to ynic-users a few days after the session. Nearer the time, Quentin will forward an agenda (i.e. once it has been established). And as before, the session will take place in Psychology B020, at 4pm. Thanks, Michael -- Dr Michael Simpson Science Liaison Officer York Neuroimaging Centre Innovation Way York YO10 5DG Tel: 01904 567614 Web: http://www.ynic.york.ac.uk

17 years, 2 months

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Thursday Seminar

by Sam Johnson

Hello all, Just a reminder and a little more information about this Thursday's Seminar at YNiC. Mark has prepared an introduction to Unix that I will do my very best to translate into something we mere mortals can understand. This week we'll be covering some of the generic basics, including the permissions problem I know has been an issue of late. There'll also be information on some simple command line tools and the basics of scripting. Next week we'll be looking at YNiC specific information, including some useful hints and tips that will hopefully help to save you time and blood pressure. Thanks, Sam

17 years, 2 months

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MEG at YNiC : current status

by Gary Green

Dear colleagues I am sorry to have to announce that MEG is not working. We have had a problem since late last week with the Polhemus system which is needed for co-registration of the data with MRI. We thought we had fixed it over the weekend but it is now clear that we have to have a new unit flown in from San Diego. We will also need to get 4D engineers to attend to fix the problem as it is not simply one of replacing the unit. Unfortunately this means that MEG may be unavailable until the middle of next week. I know this is going to be a major inconvenience as MEG is currently very busy. As soon as it is working again we will let you know and will help you rebook or reorganise your time in MEG. We will almost certainly have to organise block booking so that several participants can be scanned one after the other to get through the backlog. The MEG system itself is working fine! Projects are stalled because of a piece of equipment that costs less than 1% of the original MEG cost. Sorry, Gary -- Gary Green Director York Neuroimaging Centre The Biocentre York Science Park Innovation Way Heslington York YO10 5DG http://www.ynic.york.ac.uk tel. 01904 435349 fax 01904 435356 mobile 07986 778954

17 years, 2 months

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[Fwd: [Eeglablist] FIAS Summer School Theoretical Neuroscience & Complex Systems (2-24 August 2008, Frankfurt, Germany)]

by Gary Green

<apologies for multiple postings> Announcement and Call for Applications: The Frankfurt Institute for Advanced Studies (FIAS) is organizing a PENS-Blackwell Summer School on: Theoretical Neuroscience & Complex Systems Frankfurt, Germany, August 2-24, 2008 We invite applications for this three-week summer school from graduate students and post-docs in experimental and computational neuroscience and theoretical physics. Up to 30 students will be accepted. The school is supported by PENS - the Programme of European Neuroscience Schools, an IBRO-FENS collaboration. Application deadline: Monday, April 7. School: http://fias.uni-frankfurt.de/neuro_school/ Application: http://fens.mdc-berlin.de/pens/2008/schools/frankfurt/ Scientific Directors: W. Maass, C. von der Malsburg, G. Pipa, W. Singer, J. Triesch, M. Tsodyks Lecturers and Tutors Include: * Dana Ballard, UT Austin, USA * Emery Brown, Harvard/MIT, Cambridge, USA * Yang Dan, UC Berkeley, USA * Sophie Deneve, CNRS, France * Rodney Douglas, ETH Zurich, Switzerland * Jordi Garcia-Ojalvo, Universitat Politecnica de Catalunya, Spain * Wulfram Gerstner, EPFL, Switzerland * Ann Graybiel, MIT, USA * Mary Hayhoe, UT Austin, USA * Jurgen Kurths, University of Potsdam, Germany, * Jorg Lucke, FIAS, Germany * Wolfgang Maass, Technische Universitat, Graz, Austria * Christoph von der Malsburg, FIAS, Germany * Sergio Neuenschwander, MPIH, Germany * Danko Nikolic, MPIH, Germany * Gordon Pipa, FIAS and MPIH, Germany * Austra Saudargiene, Vytautas Magnus University, Lithuania * Kerstin Schmidt, MPIH, Germany * Wolf Singer, MPIH, Germay * Olaf Sporns, Indiana University, USA * Jochen Triesch, FIAS, Germany * Peter Uhlhaas, MPIH, Germany * Raul Vicente, FIAS and MPIH, Germany * Cornelius Weber FIAS, Germany * Michael Wibral, MPIH, Germany * Kai Willadsen, FIAS, Germany * Junmei Zhu, FIAS, Germany Topics: mathematical and biological foundations of theoretical neuroscience; analysis of neural data; modelling of neurons and small networks; plasticity and learning; modelling higher cognitive functions, embodiment Format: - a 3-day pre-school to establish a common foundation and language - daily lectures by renowned international faculty - hands-on work on self-defined projects in interdisciplinary groups - round table discussions - a social and cultural program Registration Fees, Travel Expenses and Waivers: The school covers the expenses for accommodation and the cultural program. Students will have to pay a registration fee of 400 EURO. A small number of grants are available for students who need support for their travel expenses and a waiver for the registration fee. They are primarily intended for students from disadvantaged regions. If you consider applying for financial support, please indicate this in your application. We also need an estimate of your travel expenses (in EUROs). For further information, please contact: Neuro School Frankfurt Institute for Advanced Studies Johann Wolfgang Goethe University Ruth-Moufang-Str. 1 60438 Frankfurt am Main Germany email: neuro_school(a)fias.uni-frankfurt.de tel: +49 69 798 47601 fax: +49 69 798 47611

17 years, 2 months

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Msc project presentations

by Silvia Gennari

Hi, all, This is just a reminder that the second part of the Msc project presentations that have started last week will continue tomorrow Thursday at 4PM at YNiC. Everyone is welcome S Silvia Gennari Department of Psychology University of York York, YO10 5DD United Kingdom

17 years, 2 months

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[Fwd: [Comp-neuro] Call for applications: PGCN 2008 Course on The Hippocampus and Navigation]

by Maribel Pulgarin

Dear All, Some may find this course interesting. Maribel -- ________________________________ Maribel Pulgarin MEG Manager York Neuroimaging Centre Innovation Way York YO10 5DG Tel: 01904 567614 Fax: 01904 435356 Web: http://www.ynic.york.ac.uk ----- Mensaje reenviado ---- De: Mate Lengyel <lmate(a)gatsby.ucl.ac.uk> Para: comp-neuro(a)neuroinf.org Enviado: miércoles, 13 de febrero, 2008 17:30:48 Asunto: [Comp-neuro] Call for applications: PGCN 2008 Course on The Hippocampus and Navigation Call for applications: The Hippocampus and Navigation 31 March - 4 April 2008 Champalimaud Foundation Neuroscience Program Instituto Gulbenkian de Ciência Oerias, Portugal This intensive, week-long course will explore one of the most intensively investigated and fascinating regions of the mammalian brain, the hippocampus. Leading researchers will provide background on classical and contemporary views of this structure, ranging from the microcircuit to the behavioral level. Topics of focus will include the anatomy and physiology of the hippocampal formation, navigation and spatial processing, neural maps and memory, and cortico-hippocampal replay of neural activity. The integration of experimental and theoretical/computational approaches will be emphasized. Tutorials and seminars will be complemented by debates, focus lectures and discussions. A final symposium will address the future of hippocampal research. A list of instructors is below; full schedule information is available at http://pgcn.igc.gulbenkian.pt/doku.php/pgcn:course:navigation_hippocampus:s…. Up to 10 places available for students for this course. Applications are especially encouraged from doctoral students and postdoctoral fellows with some general background in neuroscience. There will be no tuition charge but students will be expected to pay their own travel, board and accommodation. The course runs as part of the Gulbenkian-Champalimaud Neuroscience Program (PGCN), an PhD program in the biological bases of behavior. Logistical assistance for local accommodation will be provided. Further logistical information is available at the course web site. Applications should be sent to Miguel Remondes (remondes(a)MIT.EDU <mailto:remondes@MIT.EDU>) and include a CV, names and email of 2 references, and a short statement of interest (max 500 words). Application deadline is 24 February, 2008. Course organizers: Miguel Remondes (MIT) Mate Lengyel (U Cambridge) Program director: Zach Mainen (CFNP, IGC) Course instructors: Francesco Battaglia (U Amsterdam) Sue Becker (McMaster U) Verner Bingman (BGSU) Neil Burgess (UCL) József Csicsvári (U Oxford) Anthony Dickinson (U Cambridge) Howard Eichenbaum (BU) Fred Gage (Salk I) Wulfram Gerstner (EPFL) Mike Hasselmo (BU) Stefan Leutgeb (Trondheim) Ole Paulsen (U Oxford) Cosme Salas (U Sevilla) Wendy Suzuki (NYU) Alessandro Treves (SISSA) Nachum Ulanovsky (Weizmann I) Matt Wilson (MIT) Menno Witter (Trondheim) Sponsored by: Champalimaud Foundation Gulbenkian Foundation -- Mate Lengyel, PhD Computational and Biological Learning Lab Cambridge University Engineering Department Trumpington Street, Cambridge CB2 1PZ, UK tel +44 (0)1223 748 532, fax +44 (0)1223 332 662 lmate(a)gatsby.ucl.ac.uk <mailto:lmate@gatsby.ucl.ac.uk>, gatsby.ucl.ac.uk/~lmate _______________________________________________ Comp-neuro mailing list Comp-neuro(a)neuroinf.org <mailto:Comp-neuro@neuroinf.org> http://www.neuroinf.org/mailman/listinfo/comp-neuro

17 years, 2 months

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YNiC ASC session on Virtual Electrode Analyses in MEG

by Andy Ellis

Dear All NOTES ON THE YNIC ANALYSIS SUPPORT COLLOQUIUM ON VIRTUAL ELECTRODE ANALYSES IN MEG, WEDNESDAY 13 FEBRUARY 2008. The current YNiC MEG tools allow us to create beautiful and defensible images showing how the brain's responses to stimuli evolve over time. But beamforming requires the comparison of active windows with passive windows, and the use of active windows less that 200 ms long is not recommended. So while moving windows convey a good initial impression of the progression of neural events, they do not take full advantage of MEG's potential for looking at the detailed timing of those events. There is another issue with beamformed brain maps, which is that it is not easy to compare results across conditions. You can point out that there is a significant response in a particular brain region in one condition of an experiment but not in another, but it could be that the response just makes it over the threshold in one condition and just falls below threshold in the other. The absolute difference in the magnitude of the two responses (or, to be accurate, the magnitude of the difference between the two active and passive conditions) may be small. Virtual electrodes offer the potential for asking intelligent questions about the strength and time course of events at specific points in the brain, allowing direct comparisons between conditions and making better use of the temporal resolution of MEG. Piers Cornelissen presented the results of some virtual electrode analyses he and his colleagues have done, comparing responses to different types of stimuli at different regions of interest in the brain. Piers showed results in the form of time-frequency histograms ('Stockwell plots'), separating out evoked and induced components of the total response; also event-related frequency (ERF) plots showing changes in the amplitude of evoked responses over time. He also discussed techniques that he and his colleagues have used for making statistical comparisons across conditions in both types of analysis. A lengthy and gripping discussion ranged over: 1. The best method to identify regions of interest, 2. How best, having identified a point of interest in a standardised brain, to identify the corresponding points in individual participant brains, and 3. What issues are involved in doing individual and group level analyses, and what would be the best analyses to adopt within YNiC, at least as interim solutions that will allow research groups to make progress with these techniques. Doing virtual electrode analyses at a group level is a complex business but has strong appeal to a number of researchers. Piers has a working solution which he and Uzma will document and make available. In complement to this documentation, YNiC will document the assumptions and issues associated with Virtual Electrode Analysis at the group level. It was also clear in the discussion that connectivity measures applied to Virtual Electrode analysis are going to be important to understanding more about the signals recorded in MEG, and more about how functional interactions involving different regions in the brain evolve over time. Deep thought will be given to this topic within YNiC. Ideas for future fora are welcomed. Andy Ellis and Michael Simpson -- Professor Andy Ellis Department of Psychology University of York York YO10 5DD England Tel. +44 (0)1904 433140 http://www.york.ac.uk/depts/psych/www/people/biogs/awe1.html

17 years, 3 months

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Last nights YNiC ASC session.

by Michael Simpson

Dear all, just to say thanks to Andy and Piers for chairing last nights YNiC ASC session; a digest of which will be forwarded to the User list in due course. Given that we gave everyone the option to leave at 5pm, but everyone stayed until 5.30, I'll interpret it to have been and success! It was good that it generated so much discussion. On which note, would anyone like to volunteer to chair the next YNiC ASC session? If so, send an email to the ynic-users stating the topic for discussion, and the date on which you would like to hold the session. I look forward to hearing from you all ... thanks, Michael -- Dr Michael Simpson Science Liaison Officer York Neuroimaging Centre Innovation Way York YO10 5DG Tel: 01904 567614 Web: http://www.ynic.york.ac.uk

17 years, 3 months

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master students presentations

by Silvia Gennari

Hi, all, This is just a reminder that tomorrow (Thursday) at 4PM, MSC students will be giving presentations at YNiC. Everyone is welcome Silvia Gennari Department of Psychology University of York York, YO10 5DD United Kingdom

17 years, 3 months

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Virtual electrode analysis in MEG: the 1st YNiC ASC

by Andy Ellis

Dear All I will attempt to chair a discussion this Wednesday (11th) at 4pm on virtual electrode analysis in MEG. The meeting is the first of the proposed YNiC Analysis Support Colloquia looking at current and future needs for data analysis (MRI as well as MEG). The meeting will take place in the Psychology lecture theatre (B020), NOT in YNiC. Virtual electrode analyses probe individual points in the brain. They potentially allow you to chart the response at that location over time, taking full advantage of the capacity of MEG to record changes over time with millisecond accuracy. Some of us feel, possibly naively, that the ability to do virtual electrode analyses at a group as well as an individual level is all that stands between us and world domination. Piers will begin by demonstrating some group level analyses that he and colleagues have done as part of an MEG study that included written words, consonant strings and faces as stimuli. The aim of the session, however, is not to discuss the meaning of different studies, but what what forms of virtual electrode analysis are possible, and what we could hope to learn from them. If you have attempted any virtual electrode analyses, or think that you may want to do some in future, please bring them along. Anyone who has any results to share is welcome to bring along some slides. So that's Wednesday at 4pm in Psychology B020. Andy -- Professor Andy Ellis Department of Psychology University of York York YO10 5DD England Tel. +44 (0)1904 433140 http://www.york.ac.uk/depts/psych/www/people/biogs/awe1.html

17 years, 3 months

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