As part of a cool project in blogging on Google+ ("plogging"), Nature editor Noah Gray writes about a recent experiment that found that specific neurons in the human amygdala respond instantly to images of animals. These responses were stronger and faster than when other neurons responded to those images, and stronger and faster than when the animal-centric neurons responded to other types of images.
The amygdala is well known to be involved in fear modulation and memory, as well as influencing other types of emotional processing. So is it expected that cells in this structure would respond so strongly to the sight of animals? There is a moderate precedent from the non-human primate literature. Studies in macaques have revealed strong firing of amygdalar neurons to faces, so categorical responses aren't unique in the amygdala. This is true in humans as well, but humans also maintain a different dedicated brain region for face processing, perhaps opening up some portions of the amygdala to take on additional, different roles. But why would we need a dedicated system for animal imagery, elevating this particular stimulus to such an important position in our recognition system? Well this is all speculation, but it isn't difficult to state the obvious and stress that animals were critical as prey for our ancient ancestors, as well as potential threats. Thus, early man may have developed a system to speed our reaction times to such an important category as the landscape was visually scanned for information. Placing this system in a brain region critical to emotion processing could have also more-easily mobilized action through a rapid activation of attack or flight responses.
Image: Animal Kingdom Sign, a Creative Commons Attribution Share-Alike (2.0) image from pixeljones's photostream
The Breitbart chief and Trump campaign CEO’s sexist bullying was evident in the early days of Biosphere 2 in Arizona, then a quasi “space colonization” and environmental research project. Stephen K. Bannon, who recently took a leave from running Breitbart.com to become Donald Trump’s chief campaign executive, once bullied women in the historic environmental research […]
Jesse Singal requested this shoop, and I delivered. After all, who’s downloading pirated papers? Everyone. (I’ve uploaded this to Redbubble if you’d like a poster—of course, you can just as well pirate it.)
Hydraulic Press Channel shows why carbon fiber and variants like carbon nanotubes have so many uses: depending on the configuration, they can hold up against the hydraulic press.
While Netflix and Hulu have seemingly dominated the streaming market with their limited selections, we’ve looked a little outside the box and found something pretty great as an alternative. SelectTV combines all the content of cable with the convenience of streaming, and it’s affordable too.SelectTV is an online subscription service that packs an impressive library of over […]
These days, the vape market is saturated with low-quality products, making it nearly impossible to separate the gems from the duds. The Atmos Rx Dry Herb Vaporizer stands out from crowd for two reasons: its impressive battery life and durable construction. This high-end little gadget is compact enough to fit in your pocket, and packs a powerful punch, […]
If you’re like us, you occasionally get ambitious with your dinner and try to cook multiple sides plus a main dish. These efforts usually end as a cold meal plus a pile of dishes to wash. MasterPan Multi-Sectional Meal Skillet makes it super easy to make multiple dishes at once without the hassle. This heavy gauge bottom pan […]