Format

Send to

Choose Destination
See comment in PubMed Commons below
Neuropsychologia. 2017 Jan 22. pii: S0028-3932(17)30025-8. doi: 10.1016/j.neuropsychologia.2017.01.019. [Epub ahead of print]

Are numbers grounded in a general magnitude processing system? A functional neuroimaging meta-analysis.

Author information

  • 1University of Western Ontario, London, Ontario, Canada.
  • 2Ghent University, Ghent, Belgium.
  • 3University of Western Ontario, London, Ontario, Canada. Electronic address: daniel.ansari@uwo.ca.

Abstract

It is currently debated whether numbers are processed using a number-specific system or a general magnitude processing system, also used for non-numerical magnitudes such as physical size, duration, or luminance. Activation likelihood estimation (ALE) was used to conduct the first quantitative meta-analysis of 93 empirical neuroimaging papers examining neural activation during numerical and non-numerical magnitude processing. Foci were compiled to generate probabilistic maps of activation for non-numerical magnitudes (e.g. physical size), symbolic numerical magnitudes (e.g. Arabic digits), and nonsymbolic numerical magnitudes (e.g. dot arrays). Conjunction analyses revealed overlapping activation for symbolic, nonsymbolic and non-numerical magnitudes in frontal and parietal lobes. Contrast analyses revealed specific activation in the left superior parietal lobule for symbolic numerical magnitudes. In contrast, small regions in the bilateral precuneus were specifically activated for nonsymbolic numerical magnitudes. No regions in the parietal lobes were activated for non-numerical magnitudes that were not also activated for numerical magnitudes. Therefore, numbers are processed using both a generalized magnitude system and format specific number regions.

KEYWORDS:

Functional magnetic resonance imaging; Neural specialization; Non-numerical magnitude; Nonsymbolic; Numerical magnitude; Symbolic

[PubMed - as supplied by publisher]
PubMed Commons home

PubMed Commons

0 comments
How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Elsevier Science
    Loading ...
    Support Center