Yes, but its not ideal. You need a ground and reference electrode, at least one electrode to detect eye movement (one above the eye and one below is better), and at least one at Cz or wherever you think you should see a maximal component of interest.
To the great comment given by Alen I would like to add that although it is possible, you may not be satisfied with the result specially if you want to work in single trial analysis (e.g. in BCI analysis) or use EEG signal processing algorithms
Thanks Alan and Pouya for your answers..
according to your experiences how many channels are ideally used in the ERP and single trial analysis (BCI)
You pose a tricky question as there are big differences between ideally, good enough, and what you can get away with. What this really boils down to is your specific question of interest. If you are focusing on uncovering the neural processes underlying a specific task then you might require a lot of post processing and even source localization. In this case a lot (>64) of channels would be ideal. However, if you are trying to create and improve a BCI for use in a clinical population that tires easily, then one of the systems with just a few channels (~16-24) that sets-up quickly and easily might be good enough. However, if you just want to make a demo BCI off of a large and commonly found signal like a P300, then you might get away with a system with less than 8 total electrodes.
Yeh mr. Ahmed, definitely u can but the main important point to be noticed here is the sample rate of the system. It also depends on what type of study (intervention) u are going to do.
Yes, Ahmed - the key thing is to think very carefully about what you want to get out of the study and what information you need. An example is attached from the Medical Research Council Cognition and Brain Sciences Unit in Cambridge.
If I am just interested in visual stimuli (images of someone), so which channels are better to record the ERPs?
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