Hi Anish, do you want to detect these movements or do you also want to discriminate between these movements?
There are several hints I would like to give you: 1) You have to be very careful that you will not actually use myographic activity instead of brain activity (I assume you want to use brain activity only). Especially with movements that require muscle activity of muscle groups close to the EEG electrodes. 2) The SNR of the brain patterns associated with movements is usually very well correlated with the size of the corresponding cortical area. That is, finger movements or tongue movements produce better (easier to detect or discriminate) patterns than shoulder or elbow movements, since the latter two have much smaller cortical representations in the motor cortex. 3) Because of the previous two points I suggest you should focus on discriminating the following tasks: (right finger(s), left finger(s), foot movement (both at the same time). For electrode locations, I suggest to cover the motor-sensory area as good as it is possible with your number of electrodes and your electrode caps available - including the positions C3, C4, and Cz. 4) For additional information, I suggest you should read some of the many papers that have been written about this topic. Best, Bernhard Graimann Anish Mittal wrote: > > I want to detect the various body movements like eye blink,teeth > clinch,shoulder movement,finger movement,leg movement,hand > clapping,tongue movement through EEG signals.It is not possible through > the placement of electrodes as in 10-20 system. > The primary motor cortex or M1, is one of the principal brain areas > involved in motor function.(refer to: > http://www.brainconnection.com/topics/?main=anat/motor-anat > <http://www.brainconnection.com/topics/?main=anat/motor-anat>). > So i think all the electrodes should be placed in this region only. > How i should place the electrodes of the EEG machine so that i can > detect these physical movements( i have a machine with 19 electrodes) > > Awaiting reply > > Anish Mittal > Btech Electrical > IIT Roorkee > > > > ------------------------------------------------------------------------ > > _______________________________________________ > BCI-info mailing list > [email protected] > https://mlist.tugraz.at/mailman/listinfo/bci-info _______________________________________________ BCI-info mailing list [email protected] https://mlist.tugraz.at/mailman/listinfo/bci-info
