Tactile hyperacuity thresholds correlate with finger maps in primary somatosensory cortex (S1)

  • Duncan R
  • Boynton G
  • 101


    Mendeley users who have this article in their library.
  • 53


    Citations of this article.


Behavioral tactile discrimination thresholds were compared with functional magnetic resonance imaging measurements of cortical finger representations within primary somatosensory cortex (S1) for 10 human subjects to determine whether cortical magnification in S1 could account for the variation in tactile hyperacuity thresholds of the fingers. Across 10 subjects, the increase in tactile thresholds from the index finger to the little finger correlated with the decrease in cortical representation across fingers in S1. Additionally, representations of the fingers within S1, in Brodmann areas 3b and 1, were also correlated with the thresholds. These results suggest that tactile hyperacuity is largely determined by the cortical representation of the fingers in S1.

Author-supplied keywords

  • Digit
  • Hand
  • Skin
  • Somatic
  • Touch
  • fMRI

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document


  • Robert O. Duncan

  • Geoffrey M. Boynton

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free