Fast cortical dynamics encode tactile grating orientation during active touch.

ABSTRACT: Touch-based object recognition relies on perception of compositional tactile features like roughness, shape, and surface orientation. However, besides roughness, it remains unclear how these different tactile features are encoded by neural activity that is linked with perception. Here, we establish a cortex-dependent perceptual task in which mice discriminate tactile gratings on the basis of orientation using only their whiskers. Multielectrode recordings in the barrel cortex reveal weak orientation tuning in average firing rates (500-ms time scale) during grating exploration despite high levels of cortical activity. Just before decision, orientation information extracted from fast cortical dynamics (100-ms time scale) more closely resembles concurrent psychophysical measurements than sing

SUBMITTER: Harrell ER 

PROVIDER: S-EPMC8442870 | biostudies-literature | 2021 Sep

REPOSITORIES: biostudies-literature