I had one of me neurostimulators replaced at the San Francisco Veterans Medical Center this summer and in the aftermath programming one setting caused me to to become emotional, sobbing. Susan Heath, my programmer, attributed this to feedback in the limbic system. Maryse's posting this week also used this term. Searching PubMed I found numerous references to studies and articles which contained the same term which related to risk taking. The searches are here with the results: http://tinyurl.com/yzzc8kr A small number of you are interested enough to discover 2+2 and a smaller number will actually go to a medical library and look at the full study. I used to be in that small number spending lots of time in he journal stacks but I have slacked off in my old age and no longer have access to a medical library here in paradise. Perhaps some of you will pick up where I left off. The studies pointed to by the tinyurl above will be updated. Save the tinyurl as PD - Risk Taking. John Cottingham ---------------------------------------------------------------------- To sign-off Parkinsn send a message to: mailto:[log in to unmask] In the body of the message put: signoff parkinsn