Fundamental Research Division
The DRF at the CEA assemble approximately 6,000 scientists since January 2016.
Découvertes et avancées | Scientific result | Cognition | MRI
Researchers at the CEA-Joliot (NeuroSpin) have succeeded in systematically decoding the cognitive activity associated with various brain activation patterns as recorded by functional MRI. This feat was achieved using neural networks trained on the largest public brain imaging database.
Functional MRI (fMRI) can be used to visualize the brain structures involved in a cognitive process, allowing us to "see the brain think". Conversely, it is much more difficult to identify the cognitive processes involved when an fMRI image is taken in an unknown context.
In fact, this "decoding" requires a statistical analysis of the brain activity involved in a large number of cognitive processes.
Researchers at the NeuroSpin set out to meet this challenge by exploiting all available statistical maps of fMRI images from the largest data repository available, NeuroVault.
They were able to distinguish more than 50 classes of cognitive processes, despite the heterogeneity of the training data, without any a priori knowledge of the experimental setting. These results demonstrate that image-based meta-analyses can be conducted on a large scale and with minimal manual data processing. Moreover, they now enable the identification of cognitive processes associated with specific brain activities.
CEA is a French government-funded technological research organisation in four main areas: low-carbon energies, defense and security, information technologies and health technologies. A prominent player in the European Research Area, it is involved in setting up collaborative projects with many partners around the world.