Neuroscience of Avatar

In his book Mirroring People, Marco Iacoboni wrote about a famous Israeli actor mentioning mirror neurons in his acceptance speech during an award ceremony. Movies are probably going to be the first industry (other than the TV commercials) to cash-in on the emerging neuroscience research.
I am yet to watch the movie Avatar but  good thing I didn't watch it before reading this fascinating "neuro centric" review of the movie by Jonah Lehrer.

"The experiment was simple: they showed subjects a vintage Clint Eastwood movie ("The Good, The Bad and the Ugly") and watched what happened to the cortex in a scanner. To make a long story short, the scientists found that when adults were watching the film their brains showed a peculiar pattern of activity, which was virtually universal. (The title of the study is "Intersubject Synchronization of Cortical Activity During Natural Vision".) In particular, people showed a remarkable level of similarity when it came to the activation of areas including the visual cortex (no surprise there), fusiform gyrus (it was turned on when the camera zoomed in on a face), areas related to the processing of touch (they were activated during scenes involving physical contact) and so on. Here's the nut graf from the paper:

 

This strong intersubject correlation shows that, despite the completely free viewing of dynamical, complex scenes, individual brains "tick together" in synchronized spatiotemporal patterns when exposed to the same visual environment.

 

But it's also worth pointing out which brain areas didn't "tick together" in the movie theater. The most notable of these "non-synchronous" regions is the prefrontal cortex, an area associated with logic, deliberative analysis, and self-awareness. (It carries a hefty computational burden.) Subsequent work by Malach and colleagues has found that, when we're engaged in intense "sensorimotor processing" - and nothing is more intense than staring at a massive screen with Dolby surround sound while wearing 3-D glasses - we actually inhibit these prefrontal areas. The scientists argue that such "inactivation" allows us to lose ourself in the movie:

 

Our results show a clear segregation between regions engaged during self-related introspective processes and cortical regions involved in sensorimotor processing. Furthermore, self-related regions were inhibited during sensorimotor processing. Thus, the common idiom ''losing yourself in the act'' receives here a clear neurophysiological underpinnings.

 

What these experiments reveal is the essential mental process of movie-watching. (Other research has also emphasized the ability of stories to blur the difference between fiction and reality.) This doesn't mean that every movie needs to be an action packed spectacle, just as Greenberg was wrong to suggest that every painting should imitate Pollock. But I think it helps reveal why Avatar is such a success. At its core, movies are about dissolution: we forget about ourselves and become one with the giant projected characters on the screen. In other words, they become our temporary avatars, so that we're inseparable from their story. (This is one of the reasons why the Avatar plot is so effective: it's really a metaphor for the act of movie-watching.*) And for a mind that's so relentlessly self-aware, I'd argue that 100 minutes of self-forgetting (as indicated by a quieting of the prefrontal cortex) is a pretty nice cognitive vacation. And Avatar, through a variety of technical mechanisms - from the astonishing special effects to the straightforward story to the use of 3-D imagery - manages to induce those "synchronized spatiotemporal patterns" to an unprecedented degree. That is what the movies are all about, and that is what Avatar delivers.

 

*And just because I've already gone off the deep end of pretentiousness, I thought I though should mention the parable that Avatar made me think of. I found the quote via Borges, but it's from the Chinese philosopher Zhuangzi:

 

Once Zhuangzi dreamt he was a butterfly, a butterfly flitting and fluttering around, happy with himself and doing as he pleased. He didn't know he was Zhuangzi. Suddenly he woke up and there he was, solid and unmistakable Zhuangzi. But he didn't know if he was Zhuangzi who had dreamt he was a butterfly, or a butterfly dreaming he was Zhuangzi"