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Barb M, the following is serious stuff (out of character for me, right?): In the USA, as far as I know in all states, the electrical current pulsates at 60 Hertz, originally known as 60 Cycles-per-second, so every appliance or device that runs from the power lines also pulses 60 times per second, if you look at a single light bulb you may be able to actually see it brighten and dim to that frequency. In other countries the frequency is 50 CPS, or maybe 25CPS, which was used many years ago in Canada, and parts of the USA, I have heard from a person who lived in Bufflo New York, where they had 25 CPS, it was very noticible. A fan motor will run at a multiple of the frequency, if you shine a bright light at the fan at 60 cycles, the fan will appear stopped. What your symptoms are caused by, may be a combination of either natural daylight being interupted by the fan blade at a repetitive rate, or a light bulb being interupted by the fan blades. If you have 4 blades blocking a light at 60 cycles per second, the eye sees 15 flashes a second. parkinson tremors are said to be in the range of 8 to 15 cycles per second.......When my dad was able to walk around, he seemed to have less problem with freezing in the light of the sun, basically a non-pulsed source of light, then when inside under a 60 cycle driven lighting system. I think there is a definite relationship here! Barb, does your feeling happen more or less depending on what kind of lighting is used? Do you have any fans that have lights mounted above the blades? If so, are they flourescent, or regular light bulbs? Ken B