Hello,
I saw this news clip today online, and was so amazed by it, I thought I would pass it on to you. It’s about people who suffer some sort of brain trauma, and when they recover, they speak in a new voice – usually with what seems to be a recognizable regional accent like say British, French or Spanish. Some people think they are faking it, but that is a lot of acting for many years. Watch the video or do your own research if you like – you be the judge. Interesting stuff! Here is the video link:
http://cosmos.bcst.yahoo.com/up/player/popup/index.php?rn=222561&cl=10658658&ch=224106
Or you can read a bit more at Wikipedia:
http://en.wikipedia.org/wiki/Foreign_accent_syndrome