IMPORTANT NOTICE

June 25, 2015
I will no longer be updating this website. The traffic on this site is low and the response effort to maintain it is too high. I will instead be focusing on the Facebook page and Twitter account for CDBS, both of which generate much more activity than the website. If you are a fan of CDBS, please don't leave! Simply follow me on Facebook or Twitter...

Tuesday, January 29, 2013

Pavlov's Rats? Rodents Trained to Link Rewards to Visual Cues


In experiments on rats outfitted with tiny goggles, scientists say they have learned that the brain's initial vision processing center not only relays visual stimuli, but also can "learn" time intervals and create specifically timed expectations of future rewards...Results of the study, in the journal Neuron, suggest that connections within nerve cell networks in the vision-processing center can be strengthened by the neurochemical acetylcholine (ACh), which the brain is thought to secrete after a reward is received. Only nerve cell networks recently stimulated by a flash of light delivered through the goggles are affected by ACh, which in turn allows those nerve networks to associate the visual cue with the reward. Because brain structures are highly conserved in mammals, the findings likely have parallels in humans, they say. more

No comments: