Feed on
Posts
Comments

In the sci-fi movie “Strange days“, Ralph Fiennes plays a petty pusher dealing with (illegal) recorded memories. The secret technology of this movie was based on so-called SQUIDs, making it possible to record any sensory input and even feeling and mood a person is in.

Today, I was alerted about the success of the work of Jack Gallant in reconstructing visual perception from brain images. The movie below displays the results.

Of course, these images are crude, but they nevertheless are a tell-tale sign of the future being brought much closer.

Here is the abstract from the paper presented in Current Biology:

Quantitative modeling of human brain activity can provide crucial insights about cortical representations [1,2] and can form the basis for brain decoding devices [3,4,5]. Recent functional magnetic resonance imaging (fMRI) studies have modeled brain activity elicited by static visual patterns and have reconstructed these patterns from brain activity [6,7,8]. However, blood oxygen level-dependent (BOLD) signals measured via fMRI are very slow [9], so it has been difficult to model brain activity elicited by dynamic stimuli such as natural movies. Here we present a new motion-energy [10,11] encoding model that largely overcomes this limitation. The model describes fast visual information and slow hemodynamics by separate components. We recorded BOLD signals in occipitotemporal visual cortex of human subjects who watched natural movies and fit the model separately to individual voxels. Visualization of the fit models reveals how early visual areas represent the information in movies. To demonstrate the power of our approach, we also constructed a Bayesian decoder [8] by combining estimated encoding models with a sampled natural movie prior. The decoder provides remarkable reconstructions of the viewed movies. These results demonstrate that dynamic brain activity measured under naturalistic conditions can be decoded using current fMRI technology.

So what is next? Translating these images to one’s own cerebrum?

-Thomas

One Response to “Mind-reading from brain scanning info?”

  1. article that appeared good enough to be read so that adds to knowledge when reading

Leave a Reply

Sharing Buttons by Linksku