Everyone knows what it feels like to be absolutely terrified. And while it might not be your favorite flavor of fun, you can't deny it's a rush. That's because your brain takes fear as a cue to start dishing out its own kind of halloween candy in the form of delicious neurotransmitters.
Morphine and cocaine both do a very good job of hitting the reward centers of your brain — but new research has shown that they do so in opposite ways.
All drugs affect your brain differently... that's assuming, of course, that these drugs have a brain to affect in the first place.
Now we know why people have been dosing themselves with the animal tranquillizer ketamine for years. Scientists have learned that ketamine, known to the experimental among you as Special K, is a powerful, fast-acting antidepressant.
It's bad enough news that Eli Lilly & Co. pulled the plug on an experimental Alzheimer's Disease drug, semagacestat, after dreadful clinical trials. But Lilly's failure makes it more likely Alzheimer's treatment research has been going down a blind alley.
A group of US neuroscientists have been studying why the scent of sweat from terrified people causes other people go into the hyper-alert fight-or-flight mode. People smelling this "stress sweat" in fMRI brain scanners show activity in the emotion-processing amygdala, and are 43 percent more accurate at identifying…