Hi everyone, I haven't been able to find anything about this by searching the forum, hopefully I haven't missed it somewhere... I had an EEG done a few months ago and although it came back 'normal' (yeah right - I just don't fit into their box!), I had some really strong reactions to the directed hyperventilation and the photostimulation. The hyperventialtion made me twitch and jerk and have some convulsions, and squirm. But the photostimulation was really intense. I kind of expected it to be - I always avoid that kind of stimulation. It used red flashing red lights, probably some of you are familiar with this. And it made me lose complete control neurologically, and go into this physiological nightmare-state of hell in the body. I started sobbing uncontrollably. Afterward felt weak and exhausted and sick and had a very hard time moving to get up. The technician emphasized that the reading was totally 'normal' and said no one else had reacted that way. I reacted similarly when trying to do a neuro-integration biofeedback program involving light stimulation at my doctor's office last spring, so I know this is a repeatable phenomenon for myself. Strobe light also mak me feel unwell, but not to this extent. Does anyone know what causes this? Has anyone had a similar experience? Thanks.