"Speeds everything up" ... cocaine.  "Speeds everything up" ...
cocaine.  US researchers have uncovered part of what's
happening, on a cellular level, to make cocaine addicts going
cold turkey feel so awful.  The results provide a better
understanding of what's creating that crashing low of withdrawal
- and may offer a clue for researchers looking to mitigate the
symptoms and keep the user from relapsing.  It is kind of like
going down a steep hill so you have to start riding that brake
really hard.   Bradley Winters  Studying genetically-engineered
mice, the researchers focused on a molecule - called cannabinoid
receptor 1, or CB1 - that slows communication between nerve
cells.  The molecule is particularly important in what is called
the nucleus accumbens region of the brain, which governs emotion
and motivation.  It was already well-known that cocaine produces
strong effects on that part of the brain. But this is the first
study of cocaine's impact on CR1 production, and what that means
for the nucleus acc