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The function of the left angular gyrus in mental arithmetic: Evidence from the associative confusion effect
Human brain mapping, 2013-05, Vol.34 (5), p.1013-1024
Grabner, Roland H.
Ansari, Daniel
Koschutnig, Karl
Reishofer, Gernot
Ebner, Franz
2013
Details
Autor(en) / Beteiligte
Grabner, Roland H.
Ansari, Daniel
Koschutnig, Karl
Reishofer, Gernot
Ebner, Franz
Titel
The function of the left angular gyrus in mental arithmetic: Evidence from the associative confusion effect
Ist Teil von
Human brain mapping, 2013-05, Vol.34 (5), p.1013-1024
Ort / Verlag
Hoboken: Wiley Subscription Services, Inc., A Wiley Company
Erscheinungsjahr
2013
Link zum Volltext
Quelle
Free E-Journal (出版社公開部分のみ)
Beschreibungen/Notizen
While the left angular gyrus (lAG) has been repeatedly implicated in mental arithmetic, its precise functional role has not been established. On the one hand, it has been speculated that the lAG is involved in task‐specific processes. On the other hand, the observation of relative deactivation during arithmetic has led to the contention that differential lAG activation reflects task‐unrelated difficulty effects associated with the default mode network (DMN). Using functional magnetic resonance imaging, we investigated the neural correlates of the associative confusion effect that allowed us to dissociate effects of task difficulty and task‐related arithmetic processes on lAG activation. The associative confusion effect is characterized by poorer performance while verifying addition and multiplication equations whose solutions are associated with the other operation (confusion equations: e.g., “9 × 6 = 15”) compared with solutions unrelated to both operations (non‐confusion equations: e.g., “9 × 6 = 52”). Comparing these two conditions revealed higher activation of the anterior lAG (areas PGa, PFm, and PF) and the left dorsolateral prefrontal cortex for the confusion problems. This effect displayed only slight anatomical overlap with the well‐established reverse problem‐size effect (small minus large problems) and task‐related deactivation in the parietal cortex. The finding of greater lAG activity (less deactivation) in the more difficult task condition is inconsistent with the hypothesis that lAG activation during mental arithmetic reflects task difficulty related modulations of the DMN. Instead, the present findings provide further support for the symbol‐referent mapping hypothesis, suggesting that the lAG mediates the automatic mapping of arithmetic problems onto solutions stored in memory. Hum Brain Mapp, 2013. © 2011 Wiley Periodicals, Inc.
Sprache
Englisch
Identifikatoren
ISSN: 1065-9471
eISSN: 1097-0193
DOI: 10.1002/hbm.21489
Titel-ID: cdi_pubmedcentral_primary_oai_pubmedcentral_nih_gov_6870455
Format
–
Schlagworte
Adult
,
Association Learning - physiology
,
Biological and medical sciences
,
Brain Mapping
,
Cognition. Intelligence
,
Confusion
,
default mode network
,
fact retrieval
,
Female
,
fMRI
,
Functional Laterality - physiology
,
Fundamental and applied biological sciences. Psychology
,
Gyrus Cinguli - blood supply
,
Gyrus Cinguli - physiology
,
Humans
,
Image Processing, Computer-Assisted
,
Investigative techniques, diagnostic techniques (general aspects)
,
Magnetic Resonance Imaging
,
Male
,
Mathematics
,
Medical sciences
,
Mental imagery. Mental representation
,
Nervous system
,
Oxygen - blood
,
parietal cortex
,
problem solving
,
Problem Solving - physiology
,
Psychology. Psychoanalysis. Psychiatry
,
Psychology. Psychophysiology
,
Radiodiagnosis. Nmr imagery. Nmr spectrometry
,
Reaction Time - physiology
,
symbol-referent mapping
,
Young Adult
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