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FW: [BIOMCH-L] summation -Seeking for a good solution for headfixation during TMS

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  • FW: [BIOMCH-L] summation -Seeking for a good solution for headfixation during TMS


    Thanks a lot for all your responses. Some weeks ago I had the following

    > Hi to all!
    > In our group, we are doing experiments with Transcranial magnetic
    > stimulation (TMS) above the cranium to investigate motor control. For
    > that purpose, we want to ensure robustness inter-session, intra
    > and repeatability at different days.
    > I wanted to ask for a good solution for this problem.
    > Thank you from advance and best regards.

    I have summarized the responses in the following:

    -----Original Message-----
    From: Ball, Kevin Ph.D. []
    Sent: Wednesday, May 07, 2003 8:32 PM
    To: 'Amir Katz'
    Cc: Dishman, J. Donald D.C.; Greiner, Thomas M. Ph.D.
    Subject: RE: [BIOMCH-L] Seeking for a good solution for head fixation
    during TMS

    Hello Amir,

    Please take a look at the enclosed paper.
    J. Donald Dishman, DC,a Kevin A. Ball, PhD,b and Jeanmarie Burke, PhDb,
    Central Motor Excitability Changes After Spinal Manipulation: A
    Transcranial Magnetic Stimulation Study, Journal of Manipulative and
    Physiological Therapeutics, Volume 25 . Number 1 . January 2002
    We use an Optotrak for this purpose. This provides us with real-time
    feedback for the purposes of
    maintaining precise alignment of the coil.

    Hope this helps.

    Thanks, Kevin

    Kevin Arthur Ball PhD
    Director, Biomechanics/Gait Research Laboratory
    New York Chiropractic College
    2360 State Rte 89
    Seneca Falls, NY 13148 (alumnus)
    315-568-3858 315-568-3204 FAX

    Hello Amir

    To ensure accurate and reproducible coil placement, we place a flexible,
    latex-coated nylon 0.5 x 0.5 cm grid on the scalp and we orientate it
    according to anatomic landmarks based on the 10 to 20 International
    system of EEG electrode placement. Using this method you may find the
    hotspot for certain muscle every time you want stimulate. Federico

    Villagra, Federico []

    Hello Amir,

    I do not work on TMS, but I have some colleagues here that do. From
    my limited understanding of this technique, one of the simplest and
    best ways to get people to stay still is to use a bite bar. best

    Young-Hui Chang

    Dear Amir Katz
    Unfortunately we don't have solutions for head fixation but if you are
    looking at evaluating the movement you generate, our KineView 2D
    movement analyser can do it in a very effective way. If you are looking
    at EMG for evaluating muscle contraction and want utmost freedom of
    movement, consider KineMyo digital wireless emg. If you want both,
    KinePro will do it. For more information, check and don't
    hesitate to be in contact. Best regards Baldur

    Baldur Thorgilsson,
    Kine ehf,
    Skulagata 26, 101 Reykjavik, Iceland
    tel: +354 580 8300, +354 5808302, fax +354 5808309

    There are a few options to control for head movement, which you know is
    critical to the success of the experiment. I can attach a photo of one
    system we use, but it is a bit complicated and it is uncomfortable for
    the subject since it is slightly heavy. The best solution has been a
    video camera tripod with a clamp. Wrap the handle of the wand with
    paper so it does not get damaged. It takes a little while to get used
    to this, but it is cost effective and functional. Someone still must be
    there to make sure the wand stays in the correct position and to control
    for head movement on the part of the subject. So far this has worked
    well for me.
    We also use a cap we can write on to trace the
    shape of the coil on the person's head. I use frosting caps that women
    use to dye their hair. They work very well. That way you can locate
    the exact spot on the scalp, and record it. with this method, I have
    been very consistent in locating the MEP's in my study.

    Beekhuizen, Kristina []

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