Sunit,
When placing the electrodes for surface EMG the general basic rules are as
follows,
1. Place the positive and negative electrodes along a line which runs
parallel to the fibres of the muscle.
2. Ideally both positive and negative electrodes should be placed the
same side of the point where the motor neuron joins the muscle fibres. Since
this will vary from muscle to muscle and is difficult to determine it is
recommended that for optimal measurement you refer to appropriate literature
such as Cram J, Kasman G, 'Introduction to Surface Electromyography. ' 1998,
Gaithersburg: Aspen Publishers.
3. The neutral electrode should be place on a part of the body close
to the other two electrodes but with little or no muscle tissue, e.g. a
'boney' surface. To objective is to find an electrically neutral location on
the body close to the muscle.
With regards to the video link you have studied, I have made the following
observations with respect to the above points.
1. The positive and negative electrodes appear to be well place in
that they are aligned parallel to the muscle fibres.
2. Off the top of my head I dont know the exact location of the point
of activation for the motor neurons in the bi-cep however even if this rule
isnt adhered to and the other two are, some signal is normally observed
though it may not be the optimal signal.
3. There is an electrically neutral location close to the elbow which
the user in the video appears to be using. It can be indentified by finding
where the bone is close to the skin in this area.
Hopefully the above information can help you obtain the signal you are
looking for.
Best Regards,
Karol
From: shimmer-users-***@eecs.harvard.edu
[mailto:shimmer-users-***@eecs.harvard.edu] On Behalf Of Sunit Verma
Sent: 03 February 2012 19:00
To: shimmer-users
Subject: [Shimmer-users] Placement of electrodes for EMG Sensing
Hi all,
I am trying to use EMG sensor but I am not sure the placement of 3 leads. As
of now I am put + and - electrodes to my biceps and N electrode was attached
to the other side of the muscle. I have followed
this link for attaching the electrode
http://youtu.be/VnrsWdA6dzE
I am still not sure whether it will work for shimmer as I am not getting
positive outcome with that placement. Can anyone please provide information
on how to place electrodes on body for EMG sensing?
--
Regards,
Sunit Verma
Graduate Student
Arizona State Univeristy