Affordable Access

Publisher Website

Temporal accuracy and variability in the left and right posterior parietal cortex

Authors
Journal
Neuroscience
0306-4522
Publisher
Elsevier
Publication Date
Volume
245
Identifiers
DOI: 10.1016/j.neuroscience.2013.04.041
Keywords
  • Tdcs
Disciplines
  • Computer Science

Abstract

Abstract Several brain-imaging and lesion studies have suggested a role for the posterior parietal cortex (PPC) in computing interval-timing tasks. PPC also seems to have a key role in modulating visuospatial mechanisms, which are known to affect temporal performance. By applying transcranial direct current stimulation (tDCS) over the left and right PPC, we aimed to modulate timing ability performance in healthy humans performing a cognitively controlled timing task. In two separate experiments we compared time-processing abilities of two groups of healthy adults submitted to anodal, cathodal or sham tDCS over right or left PPC, by employing a supra-second time reproduction task. Cathodal stimulation over the right PPC affected temporal accuracy by leading participants to overestimate time intervals. Moreover, when applied to the left PPC, it reduced variability in reproducing temporal intervals. No effect was reported for anodal stimulation. These results expand current knowledge on the role of the parietal cortex on temporal processing. We provide evidence that the parietal cortex of both hemispheres is involved in temporal processing by acting on distinct components of timing performance such as accuracy and variability.

There are no comments yet on this publication. Be the first to share your thoughts.