most doctors say you need a good 7-8 hours sleep a night (as an adult). but would someone miss out on the "rest and repair" which sleep brings by having a polyphasic sleep cycle?

There have been numerous occasions when I have consciously noted that a song sounds slower or faster than on a different occasion. When I try and keep pace with the rhythm in my head I find that I am still in time but my brain is telling me that both the tempo of the song and in my mind is different to a previous experience of the song. The difference is very small but noticeabe. Is it possible that my mind is perceiving time at a faster or slower pace?

Scientists found that religeous experiences such as visions and 'feeling a presence' could be caused by epilepsy of a specific area of the brain.  If anti-epileptic drugs are used to treat hallucinations does it follow that they are caused by epilepsy of a different part of the brain?