I had a stroke on March 23, 2005. It was a right frontal bleed.  3 years ago I started to have these 'auras' for lack of a better word.  They last about 10 seconds. I can talk, walk, do my work right through them. They throw me slightly off balance but only slightly. I am getting more lately and the doctor has me on Zonisamide..4 per day.  It slows these feelings I am sure, but doesn't stop them.  I have not and eeg, mri, cat scan...or anything like this...should I????