“USF psilocybin study”:
http://hscweb3.hsc.usf.edu/blog/2013/07/15/low-doses-of-psychedelic-drug-erases-conditioned-fear-in-mice/
The original research paper:
http://link.springer.com/article/10.1007/s00221-013-3579-0
New studies from The University of South Florida indicate that psilocybin found in “shrooms”, triggers new brain cell growth, and erases frightening memories from mice.
The studies showed that mice treated with low doses of psilocybin had significant growth of new brain cells, because the mushroom binds to a brain receptor that stimulates new brain cell growth, and short term memory formation.
This interesting discovery has given more plausibility to the Stoned Ape Theory, Terence Mckenna’s suggestion that human evolution was initiated by the mind expanding benefits of psychedelic experiences.
Researchers are eager to look into the idea of using magic mushrooms to cure mental problems like PTSD (Post Traumatic Stress Disorder) and chronic depression but the legal status of shrooms restricts freedom in experiments.
Mice trained to fear electric shock when hearing a noise associated with the shock, stopped reacting in fear to the noise when given a small dose of psilocybin, much more quickly, in contrast to mice given no psilocybin.
The science behind psilocybin treating depression is, depressed individuals typically have over active medial prefrontal cortex regions of the brain, and psilocybin eases this, and makes the brain function normally here.