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    Many thanks to everyone that replied to my question regarding marker
    attachment. Evidently the study of biomechanics has caused substantial
    hair loss, because toupee tape seems to be the solution of choice. In
    addition there were a variey of spray-on adhesive skin preps and
    Super-glue. Replies are compiled below.

    1. You could try spirit gum...used to attach fake mustaches, etc. We
    used
    it to attach markers before.

    2. I have used a skin glue by the brand name of "Stomahesive" to attach

    small plastic jigs to the lateral malleoli and knee joint lines of
    individuals while they performed a knee bending exercise. To each
    jig we
    attached an LED for use with an OPTOTRAK system.

    The "Stomahesive", which is in effect a glue that is used to attach
    colostomy bags, etc. is an easy to use skin glue that holds up well
    for
    the tasks that I have used it for. How it would work with your
    calcaneal
    device I am not sure, but my experience tells me that it holds up
    well as
    skin temperature rises and when a subject perspires. It also washes
    off
    relatively easily from the skin surface and can be washed from the
    plastic surface immediately after use or at a later date. When
    using
    this glue, it is important to not use too little or too much to
    achieve
    optimal adhesion.

    I purchased the glue at a medical supply store, one that was located

    close to a hospital setting. I hope this is of some help. Good
    luck.

    3. Have you tried Animal mesh tape? If yes, read no further. It's a
    sort
    of 'clingy, sticky' tape wrap used to adhere splints and wound
    wraps
    especially for animals.

    I haven't worked in a motion lab in years and therefore haven't
    purchased the stuff in an equal amount of time. But, I bet your
    friendly vet would know what I'm talking about and refer you to an
    appropriate catalog to order it.

    4. I had good luck using Quick Dry Adhesive (QDA) spray to prep the
    skin
    before applying tape. Its a commor Athletic Training supply.

    5. While at the university of guelph, i learned that crazy glue works
    only in
    tension, not in torsion. we used it to glue everything from
    markers to
    accelerometers to skin! one just needs to be sure that the area is
    free from
    hair, that not too much glue is used, and to use a quick twisting
    motion to
    remove the marker. your subjects may be skeptical, but it does
    work!

    6. try sleek tape.

    7. You don't say what sort of tape that you have been using or how long
    the
    trials are...

    I've always found that toupee tape works very well for holding
    markers onto
    subjects - it's double sided and designed to hold to sweaty skin.
    One
    precaution that you could take would be to use an eyebrow liner
    pencil to mark
    the outline of your plastic marker holder so that it can be replaced
    when it
    falls off.

    8. Have you thought about superglue or the tape used on "breathe-right"
    stickers?

    9. Many years ago, Julian Morris of Oxford Metrics introduced me to a
    double-
    sided tape that is made for attaching wigs to scalps. It comes in a
    roll
    attached to a non-stick paper backing and has no stiff plastic sheet
    in the
    middle like conventional double-sided tape does. That is, the tape
    is
    essentially a layer of adhesive without any backing. Once the tape
    is
    attached to the skin and the paper removed, the adhesive is free to
    change
    shape as the skin changes shape. The tape is very sticky and may be
    worth a
    try. We found some at a theatrical supply store.

    You might also try double-sided foam tape. Because the foam backing
    has some
    flexibility, it may stay attached better than other tapes.

    Good luck in your quest. It is hard to tape things to feet, isn't
    it!

    10. I've used double-sided EMG/ECG electrode tape to affix flexible
    markers
    to the skin surface over the midline of the spine. On a clean
    surface,
    this tape performed well with skin distraction. I've also seen
    rubber
    cement used to affix surface markers for gait studies, although I
    don't
    know if there might be any toxic substance absorbed throught the
    skin.

    11. there is a spray used by athletic trainers that goes on before
    applying
    tape. this spray provides a better surface for the athletic
    tape. you
    might try this

    12. We use a similar method where we attach a shell to the calcaneus
    and must change orthotic conditions. We first put Cramer quick
    drying
    adhesive (QDA) on the skin. It comes in a spray can and is often
    seen (and
    smelled) in training rooms. The tape we use is commonly called
    "McConnell's" tape. If you are not familiar with it, it is a brown
    tape,
    1 1/2 inches wide, very strong and very sticky. The brand we use
    is from
    Smith and Nephew but there are other brands out there. Hope this
    helps.

    13. Try carpet tape. Its double sided, and holds on very well.

    14. Have you tried the type of double-stick tape which is used
    to attach men's hair pieces? This "toupee tape" is very
    sticky and holds firmly. We get it from a beauty
    supply house. Perhaps a figure 8 or heel lock around the
    plastic form, provided it is not too bulky. Best of luck.

    15. We have used super glue to attach accelerometers to the skin
    of the wrist. It worked well and the sensors easily came off
    with the superficial layers of dry skin. We did not have to
    remove them surgically as some might fear. I don't know how
    that would work inside the shoe but you might want to give it
    a try. Use small drops to start with, do not try to cover the
    whole mold because that may be too much glue on the skin.

    16. A similar problem was overcome by the team below, by using modified
    running shoes, which had the posterior heel counter removed, and
    transparent plastic riveted in place of the heel counter. (I
    forget
    which it was?) These were described in the paper I give details of

    below, and came from Nike.

    Brown, Donatelli, Catlin, Wooden (1995) The effect of two types of
    foot
    orthoses on rearfoot mechanics
    JOSPT 21 (5) 258-267

    17. A fellow graduate student at Ohio State used toupee tape to hold on
    finger markers. Worked pretty well.

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