I have a feeling you are experiencing a case of (ADNFLE) or "Autosomal Dominant Nocturnal Frontal Lobe Epilepsy" on the higher end. Mine, unlike JSteel's have never gotten to full-on grand mal seizure. Every blue moon I know sometimes still do the "body jerk," sometimes doing a full uncontrollable jump in my bed while at other times a tiny foot or arm twitch will occur right before I fall into REM sleep because I subconsciously feel it happen. For a while these full and partial body jerks almost always happened to me right before I fall into REM sleep (but sometimes immediately after REM sleep) or while taking a nap; occurring for months on end while in my teens. I have noticed that as I age its frequency decreases and sometimes I go days without it happening. I, on the other hand, have never had the "deja-vu" feeling nor have ever been Rx medicated to deal with it over the years.
I have learned through my nursing courses that these full-body jerks and twitches are caused because of the brain and body's wiring in regards to the sending and receiving of signals being out-of-sync. The best way for me to explain it is:
Right before some of us fall into REM sleep our brains temporarily "shut down" for a split second. This becomes a problem because our body does not recognize this temporary shut down, thus this shut down of the brain creates a mental receptor (signal) "misfire" to the rest of the body telling the body NOT to move. The body instead interprets that signal as a signal FOR it to move, causing a clashing of information/signals and an involuntary movement with a part of or the rest of our body (body being out-of-sync with the mind/brain).
From what I understand not all epilepsy syndromes are lifelong. ADNFLE though, is common around early childhood-to-late teens and tends to decrease as the child ages with adult cases of ADNFLE now becoming more common and still not very frequent. Also medication to combat epilepsy can help but it cannot be fully cured.
In other cases, the brain does this temporary "shut down" at different and random times during the day/night due to external audible or visual influences. This would be an example of the case of (PSE) Photosensitive Epilepsy which is the reason for those stickers that read "Epilepsy Warning..." to be on certain video games and DVD movies. You would know you have PSE if you are most likely playing a certain video game or watching a certain DVD movie (versus a regular game or regular movie without the epilepsy warning sticker on it) due to certain symptoms. Symptoms would be the onset of sudden dizziness, hyperventilation, an odd feeling that results in a massive headache while sweating profusely, and sometimes a sudden feeling like you are going to vomit. Triggers of PSE to occur in an individual are choices of lighting (most likely fluorescent lighting), amount of video flash rate, choice of colors used in the video, visual patterns/movement of the video, and contrast of the video that is playing.
Example: The DVD movie Cloverfield! ....

I saw the movie the whole way through but was sweating, had a massive near-migraine and was nearly hyperventilating... all while having to keep from vomiting.
I believe an extreme result of PSE on an ungodly scale would be kind of be like the introductory Blanka scene in the original Street Fighter movie with Jean Cleaude Van-Damme. This is were the Brazilian fighter Blanka gets forcefully put into a white chamber and is exposed to hundreds of videos and sounds all on multiple screens for a very lengthy period of time. He then is released from the chamber and comes out looking like an electrocuted psycho and green like the color of a nasal infection and suddenly turns out to be a sort of Manchurian Candidate... yeah, I'd say that would be the extreme result of PSE (and drugs) ..... because ..... drugs are ummm baaad

. lol


Anyway, this is all I know about the subject but I hope this helps. I'd say depending on your age see if these fits decrease to where it may be manageable over time as you age but if not get medicated to cope with yours. Good luck and see doc soon!
* This post has been modified
: 14 years ago