New DCP Publication by Giroud et. al.

Asymmetric sampling in human auditory cortex reveals spectral processing hierarchy

Jérémy Giroud, Agnès Trébuchon, Daniele Schön, Patrick Marquis, Catherine Liegeois-Chauvel, David Poeppel, Benjamin Morillon



Speech processing is now known to be distributed across the two hemispheres, but the origin and function of lateralization continues to be vigorously debated. The asymmetric sampling in time (AST) hypothesis predicts that (1) the auditory system employs a two-timescales processing mode, (2) present in both hemispheres but with a different ratio of fast and slow timescales, (3) that emerges outside of primary cortical regions. Capitalizing on intracranial data from 96 epileptic patients we sensitively validated each of these predictions and provide a precise estimate of the processing timescales. In particular, we reveal that asymmetric sampling in associative areas is subtended by distinct two-timescales processing modes. Overall, our results shed light on the neuro functional architecture of cortical auditory processing.

You can find the paper at: https://journals.plos.org/plosbiology/article?id=10.1371/journal.pbio.3000207