Altered perceptual sensitivity to kinematic invariants in Parkinson's disease.

ABSTRACT: Ample evidence exists for coupling between action and perception in neurologically healthy individuals, yet the precise nature of the internal representations shared between these domains remains unclear. One experimentally derived view is that the invariant properties and constraints characterizing movement generation are also manifested during motion perception. One prominent motor invariant is the "two-third power law," describing the strong relation between the kinematics of motion and the geometrical features of the path followed by the hand during planar drawing movements. The two-thirds power law not only characterizes various movement generation tasks but also seems to constrain visual perception of motion. The present study aimed to assess whether motor invariants, such as the two

SUBMITTER: Dayan E 

PROVIDER: S-EPMC3281839 | biostudies-literature | 2012

REPOSITORIES: biostudies-literature