image: Measuring PCI involves perturbing the brain with transcranial magnetic stimulation and recording its immediate response by means of electroencephalography. Zipping the brain's response to a magnetic perturbation to calculate its information content allows discriminating between conscious and unconscious subjects. This image relates to a paper that appeared in the August 14, 2013, issue of Science Translational Medicine, published by AAAS. The paper, by A.G. Casali at the University of Milan in Milan, Italy, and colleagues was titled, "A Theoretically Based Index of Consciousness Independent of Sensory Processing and Behavior." view more
Credit: Image courtesy of Marcello Massimini