Document Detail

Neural signatures of number processing in human infants: evidence for two core systems underlying numerical cognition.
MedLine Citation:
PMID:  21399717     Owner:  NLM     Status:  MEDLINE    
Behavioral research suggests two cognitive systems are at the foundations of numerical thinking: one for representing 1-3 objects in parallel and one for representing and comparing large, approximate numerical magnitudes. We tested for dissociable neural signatures of these systems in preverbal infants, by recording event-related potentials (ERPs) as 6-7.5 month-old infants (n = 32) viewed dot arrays containing either small (1-3) or large (8-32) sets of objects in a number alternation paradigm. If small and large numbers are represented by the same neural system, then the brain response to the arrays should scale with ratio for both number ranges, a behavioral and brain signature of the approximate numerical magnitude system obtained in animals and in human adults. Contrary to this prediction, a mid-latency positivity (P500) over parietal scalp sites was modulated by the ratio between successive large, but not small, numbers. Conversely, an earlier peaking positivity (P400) over occipital-temporal sites was modulated by the absolute cardinal value of small, but not large, numbers. These results provide evidence for two early developing systems of non-verbal numerical cognition: one that responds to small quantities as individual objects and a second that responds to large quantities as approximate numerical values. These brain signatures are functionally similar to those observed in previous studies of non-symbolic number with adults, suggesting that this dissociation may persist over vast differences in experience and formal training in mathematics.
Daniel C Hyde; Elizabeth S Spelke
Related Documents :
3547167 - The missing pericallosal artery on sonography: a sign of agenesis of the corpus callosu...
7770127 - Intracranial lesions in the fullterm infant with hypoxic ischaemic encephalopathy: ultr...
16291347 - Prenatal impairment of brain serotonergic transmission in infants.
24515617 - Incidence, management, and outcomes of cardiovascular insufficiency in critically ill t...
2927987 - Reduction of mortality, morbidity, and respiratory distress syndrome in infants weighin...
117967 - Muscle protein degradation in premature human infants.
Publication Detail:
Type:  Journal Article; Research Support, N.I.H., Extramural    
Journal Detail:
Title:  Developmental science     Volume:  14     ISSN:  1467-7687     ISO Abbreviation:  Dev Sci     Publication Date:  2011 Mar 
Date Detail:
Created Date:  2011-11-28     Completed Date:  2012-06-11     Revised Date:  2014-09-17    
Medline Journal Info:
Nlm Unique ID:  9814574     Medline TA:  Dev Sci     Country:  England    
Other Details:
Languages:  eng     Pagination:  360-71     Citation Subset:  IM    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Brain / physiology*
Brain Mapping
Brain Waves
Cognition / physiology*
Evoked Potentials*
Mathematical Concepts*
Reaction Time
Visual Perception*
Grant Support

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Developmental continuity? Crawling, cruising, and walking.
Next Document:  Stiffness Control of a Continuum Manipulator in Contact with a Soft Environment.