Object-directed action representations are componentially built in parietal cortex.

ABSTRACT: The inferior parietal lobule supports action representations that are necessary to grasp and use objects in a functionally appropriate manner [S. H. Johnson-Frey, Trends Cogn. Sci. 8, 71-78 (2004)]. The supramarginal gyrus (SMG) is a structure within the inferior parietal lobule that specifically processes object-directed patterns of manipulation during functional object use. Here, we demonstrate that neural representations of complex object-directed actions in the SMG can be predicted by a linear encoding model that componentially builds complex actions from an empirically defined set of kinematic synergies. Each kinematic synergy represents a unique combination of finger, hand, wrist, and arm postures and movements. Control analyses demonstrate that models based on image-co

SUBMITTER: Caglar LR 

PROVIDER: S-EPMC12402996 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature