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ckozey51
09-06-2004, 09:53 PM
Hi Kevin
20 kohms may be fine depending on the input impedance of your
amplifiers i.e. should be a 1% ratio between skin/input impedance.
See Winter's chapter in Kumar and Mital "EMG and Ergonomics"
1996 Taylor and Frances Publishers.
Cheryl Kozey

Hi List,

Has anyone had any experience with high skin impedance when
measuring
surface EMG in kids? We're testing 10-12 yr olds at the moment
and I'm
having very little success lowering the impedances below 20k
without
aggressive de-braiding (which I want to avoid). We are measuring
impedance
with a non-polarising meter and I have found precedence where
only alcohol
was used for preparation (However, impedance was not reported).

Kevin Netto
NHMRC (funded) Research Officer
School of Physiotherapy, Curtin University of Technology
GPO Box U1987, WESTERN AUSTRALIA 6845
K.Netto@curtin.edu.au

http://www.physiotherapy.curtin.edu.au/home/staff/netto/
t: +61 8 9266 3681
f: +61 8 9266 3699
m: +61 0417 990 469



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C. Kozey, Ph.D.
Professor
School of Physiotherapy
Dalhousie University
Halifax NS
B3H 3J5
494-2635

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