Neural correlates of top-down modulation of haptic shape versus roughness perception.

ABSTRACT: Exploring an object's shape by touch also renders information about its surface roughness. It has been suggested that shape and roughness are processed distinctly in the brain, a result based on comparing brain activation when exploring objects that differed in one of these features. To investigate the neural mechanisms of top-down control on haptic perception of shape and roughness, we presented the same multidimensional objects but varied the relevance of each feature. Specifically, participants explored two objects that varied in shape (oblongness of cuboids) and surface roughness. They either had to compare the shape or the roughness in an alternative-forced-choice-task. Moreover, we examined whether the activation strength of the identified brain regions as measured by functional magn

SUBMITTER: Mueller S 

PROVIDER: S-EPMC6864886 | biostudies-literature | 2019 Dec

REPOSITORIES: biostudies-literature