Why do we remember bad things? A single chemical may make all the difference

  • Share
  • Read Later

With a single well-timed injection, scientists show they can erase a bad memory from the mind of a rat.

For their remarkable finding, researchers from Brazil and Argentina gave electric shocks to rats and then tested how long the animals remembered and tried to avoid shocks in the future. The researchers showed that rats will quickly forget a shock if, 12 hours after the event, they’re given a memory-wiping shot of something called a D1 dopamine receptor antagonist — a substance that knocks out major receptors for one of the brain’s key neurotransmitters, dopamine. Rats that received a milder shock, however, could be made to remember that less serious event for longer, if they received a shot of a dopamine promoter 12 hours after the event.

The magic number was 12. Shots didn’t seem to work if given immediately after the fearful event, and they didn’t seem to work if given nine hours after the event. This result, published today in the journal Science, suggests that dopamine may not play much of a role in forming thoughts and fears, but rather in lodging those experiences in long-term memory. And that’s a chemical mechanism that may well occur in humans as well as rats.

27 comments
SamirRazaXhaikh
SamirRazaXhaikh

Very interesting blog. Alot of blogs I see these days don't really provide anything that I'm interested in, but I'm most definately interested in this one. Just thought that I would post and let you know. louisiana limousine  : http://louisianalimousine.com

SamirRazaXhaikh
SamirRazaXhaikh

Thanks for taking the time to discuss that, I feel strongly about this and so really like getting to know more on this kind of field. Do you mind updating your blog post with additional insight? It should be really useful for all of us. seo services in birmingham : http://seobirmingham.marketing1on1.com/

smithjohan
smithjohan

A reliable blog always comes-up with new and exciting information and while reading I have experience that this blog is really have all those quality that qualify a blog to be a good one <a href="http://joyoforganics.com/" rel="dofollow">click site</a>

smithjohan
smithjohan

A reliable blog always comes-up with new and exciting information and while reading I have experience that this blog is really have all those quality that qualify a blog to be a good one. <a href="http://holisticrecoverycenters.com/" rel="dofollow">see it here</a>

smithjohan
smithjohan

The malestream media couldn't even grant women tokenistic majority status in fashion reporting. If HBO were to do a sitcom about the voices of this generation that reflected just who had the power to speak<a href="http://top10seomarketing.com/" rel="dofollow">Palm Beach SEO</a>

smithjohan
smithjohan

Appreciate this one, you are a great author. It's really written in depth analysis and have urged visitors to look forward more on your writing http://bgm.me/r/3810004

caryhani
caryhani

That's pretty powerful stuff. I like the way your logic follows, and how you're able to put it into words with such a powerful post! I am enthralled. <a href="http://petercelnicker.com/" rel="dofollow">Real Estate in Plantation</a>

caryhani
caryhani

What you're saying is completely true. I know that everybody must say the same thing, but I just think that you put it in a way that everyone can understand. I also love the images you put in here. They fit so well with what you're trying to say! http://risingtidecharters.com/

caryhani
caryhani

You should proud to your self for having able to write down some really wonderful tips and hints. Great articles, I think it would be a good asset. Unquestionably been having more things opened <a href="http://www.dcplasticsurgerycenter.com/liposuction/" rel="dofollow">liposuction DC</a>

caryhani
caryhani

Free untethered jailbreak on iPhone 4 and 4s with working Cydia by following step-by-step instructions, using safe and completely reversible methods for any iphone. http://jailbreakingiphone4s.com/