FYI. Keith made an interesting comment about his love for the smell 
(and taste) of vanilla. Well, for me it's chocolate.

George
Captain
The USS Ronald E. McNair (Boston)
- - - - - - - - -
http://www.nytimes.com/2005/08/23/science/23nose.html
SCIENCE: FINDINGS
This Is Your Brain on Chocolate
By DONALD G. McNEIL Jr.
Published: August 23, 2005

You remember Isaac Newton, his apple and the "Why didn't it fall 
up?" question. In the olfactory sciences, a crucial line of inquiry 
was opened up some years ago when a friend of a psychologist who was 
studying food asked, "If I hate the smell of Limburger cheese, why 
is it so delicious?" 

Researchers at Yale, the John B. Pierce Laboratory and the 
University of Dresden may now be closer to a biological answer. They 
got 11 volunteers to lie inside magnetic brain scanners with 
separate straws leading to the fronts of their noses (the part above 
the lip) and the backs (above the palate).

The subjects were taught to make facial motions that closed off 
their palate and kept the experiment from being clouded by any sense 
of taste.

Four odors were pumped in: butanol, farnesol (both described 
as "pleasantly musky"), lavender and chocolate. 

Only chocolate activated two different regions. Smelled from up 
front, it lighted up pleasure-anticipation neurons; from the back, 
it lighted up food-reward neurons. 

The scientists are unsure why only chocolate had that effect. Prof. 
Dana Small of the Yale team said it suggested that the brain changed 
smell perceptions based on eating, which is rarely done with 
lavender or musk. 

Another nasal expert, Dr. Leslie Vosshall of Rockefeller University, 
suggested confirmation with liver and brussels sprouts. 

But Dr. Small is interested in food addiction, and she wants an 
answer to her own Newtonian question: "If I don't want the buttered 
popcorn, why is it that every time I go to the movies, I'm a goner?" 
-0-







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