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: [email protected] [mailto:[email protected]] 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://www.youtube.com/watch?v=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
_______________________________________________ Shimmer-users mailing list [email protected] https://lists.eecs.harvard.edu/mailman/listinfo/shimmer-users
