View Full Version : EMG onset determination

04-07-2004, 05:02 AM
Hi to all,
I am Sujani,a research engineer at the ADAM Center at Long Island
University, NY. The ADAM Center is a small laboratory that does research on
human movement. To date, we have focused on 3D kinematics and force
platform data capture and analysis.

Currently, I have started looking at the surface EMG data that we have
collected. We are particularly interested in onset and offset EMG
timing and would like to develop a computerized algorithm that allows us to
evaluate differing filters, threshold criteria (SD from baseline, etc),
samples assessed, etc. I particularly enjoyed the articles by Hodges
and Bui (1996): ³A comparison of computer-based methods for the
determination of onset of muscle contraction using electromyography² in
Electroencephalography and Neurophysiology.

I was wondering if I could get the latest updates and details on EMG
onset determination. As I was browsing the web, I came across a lot of
literature. It looks like each person uses a different value for
threhold, frequency for filtering,sample rate etc. What is the best way to
determine the onset?

I found out that some work has been done in MATLAB in this regard.
Before I start to write a new program in Labview, I was wondering if anyone
know about any shareware that may be available? Any ideas or
suggestions are welcome.

Research Engineer
ADAM Center
Long Island University
Brooklyn, New York
E-mail: an_sujani@yahoo.com

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