Dyscalculia: neuroscience and education.
BACKGROUND: Developmental dyscalculia is a heterogeneous disorder with largely dissociable performance profiles. Though our current understanding of the neurofunctional foundations of (adult) numerical cognition has increased considerably during the past two decades, there are still many unanswered questions regarding the developmental pathways of numerical cognition. Most studies on developmental dyscalculia are based upon adult calculation models which may not provide an adequate theoretical framework for understanding and investigating developing calculation systems. Furthermore, the applicability of neuroscience research to pedagogy has, so far, been limited. PURPOSE: After providing an overview of current conceptualisations of numerical cognition and developmental dyscalculia, the present paper (1) reviews recent research findings that are suggestive of a neurofunctional link between fingers (finger gnosis, finger-based counting and calculation) and number processing, and (2) takes the latter findings as an example to discuss how neuroscience findings may impact on educational understanding and classroom interventions. SOURCES OF EVIDENCE: Finger-based number representations and finger-based calculation have deep roots in human ontology and phylogeny. Recently, accumulating empirical evidence supporting the hypothesis of a neurofunctional link between fingers and numbers has emerged from both behavioural and brain imaging studies. MAIN ARGUMENT: Preliminary but converging research supports the notion that finger gnosis and finger use seem to be related to calculation proficiency in elementary school children. Finger-based counting and calculation may facilitate the establishment of mental number representations (possibly by fostering the mapping from concrete non-symbolic to abstract symbolic number magnitudes), which in turn seem to be the foundations for successful arithmetic achievement. CONCLUSIONS: Based on the findings illustrated here, it is plausible to assume that finger use might be an important and complementary aid (to more traditional pedagogical methods) to establish mental number representations and/or to facilitate learning to count and calculate. Clearly, future prospective studies are needed to investigate whether the explicit use of fingers in early mathematics teaching might prove to be beneficial for typically developing children and/or might support the mapping from concrete to abstract number representations in children with and without developmental dyscalculia.
Clinical Department of Pediatrics IV, Section Neuropediatrics, Innsbruck Medical University, Austria.
Liane
L
Kaufmann
Neurosci Lett. 2007 May 1;417(2):181-6
17367929
Psychol Rev. 1999 Jul;106(3):491-528
10467896
Cereb Cortex. 2005 Nov;15(11):1779-90
15716474
Child Neuropsychol. 2005 Oct;11(5):413-30
16306017
Cortex. 2008 Apr;44(4):359-67
18387566
Dev Med Child Neurol. 2007 Apr;49(4):306-11
17376143
Trends Cogn Sci. 2006 Apr;10(4):146-51
16530462
Psychol Bull. 2005 Jul;131(4):592-617
16060804
Pediatr Neurol. 2001 May;24(5):337-42
11516606
J Clin Exp Neuropsychol. 1995 Apr;17(2):291-321
7629273
Brain Res Cogn Brain Res. 2004 Nov;21(3):412-7
15511656
Br J Educ Psychol. 2004 Mar;74(Pt 1):1-14
15096296
J Cogn Neurosci. 2007 Apr;19(4):684-93
17381258
J Cogn Neurosci. 2007 Apr;19(4):563-76
17381248
Dev Sci. 2005 Jan;8(1):88-101
15647069
Cognition. 2003 Aug;89(1):B15-25
12893126
Cognition. 2004 Sep;93(2):99-125
15147931
Curr Biol. 2003 May 27;13(11):R447-8
12781156
Cortex. 2008 Apr;44(4):368-75
18387567
Trends Cogn Sci. 2004 Jul;8(7):307-14
15242690
Eur Child Adolesc Psychiatry. 2000;9 Suppl 2:II41-57
11138904
Neuron. 2002 Jan 31;33(3):475-87
11832233
Brain Lang. 1977 Jan;4(1):45-62
318903
Cortex. 2008 Apr;44(4):393-9
18387570
Neuroimage. 2005 Apr 15;25(3):888-98
15808989
J Cogn Neurosci. 2006 Nov;18(11):1820-8
17069473
Cortex. 1997 Jun;33(2):219-50
9220256
Cortex. 2008 Apr;44(4):376-85
18387568
Proc Natl Acad Sci U S A. 1998 Jun 23;95(13):7836-41
9636237
Neuroreport. 2005 Nov 7;16(16):1769-73
16237324
J Child Psychol Psychiatry. 2005 Jan;46(1):3-18
15660640
Brain Cogn. 1985 Apr;4(2):171-96
2409994
Neuroreport. 2006 Apr 24;17(6):587-91
16603917
Q J Exp Psychol A. 1997 Nov;50(4):899-923
9450382
Neuropsychologia. 2005;43(11):1609-24
16009243
Trends Neurosci. 1998 Aug;21(8):355-61
9720604
Nat Rev Neurosci. 2005 Jun;6(6):435-48
15928716
Cognition. 2000 Jan 10;74(1):B1-B11
10594312
PLoS Biol. 2006 May;4(5):e125
16594732
J Neurosurg. 2003 Oct;99(4):716-27
14567608
Cognition. 1998 Aug;68(2):B63-70
9818514
Cognition. 2006 Sep;101(2):385-413
16844106
J Learn Disabil. 2001 Jan-Feb;34(1):59-65
15497272
Cogn Neuropsychol. 2003 May 1;20(3):487-506
20957581
Mind Brain Educ. 2007 Mar;1(1):11-19
20383259
Neurology. 1970 Mar;20(3):293-8
5461058
Eur Child Adolesc Psychiatry. 2000;9 Suppl 2:II11-6
11138899
Nature. 1992 Aug 27;358(6389):749-50
1508269
Pediatr Neurol. 2000 Apr;22(4):267-78
10788743