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RESEARCH PRODUCT
Does the left inferior parietal lobule contribute to multiplication facts?
Natasja Van HarskampPeter RudgeLisa Cipolottisubject
AdultMaleCognitive NeuroscienceExperimental and Cognitive PsychologyLeft frontal lobeNeuropsychological Testsbehavioral disciplines and activitiesFunctional LateralityMental ProcessesLeft precentral gyrusParietal LobeHumansNeurologic ExaminationSettore M-PSI/02 - Psicobiologia E Psicologia FisiologicaLeft inferior parietal lobuledyscalculia arithmetical fact retrieval multiplication and division impairment left inferior parietal lobulesupramarginal and angular gyriParietal lobeSubtractionAnatomyMagnetic Resonance ImagingNeuropsychology and Physiological PsychologyReadingBrain InjuriesMultiplicationLeft superiorPsychologyMathematicsCognitive psychologyPars opercularisdescription
We report a single case, who presents with a selective and severe impairment for multiplication and division facts. His ability to retrieve subtraction and addition facts was entirely normal. His brain lesion affected the left superior temporal and to lesser extent in the left middle temporal gyri and the left precentral gyrus extending inferiorly to the pars opercularis of the left frontal lobe. Interestingly, the left supramarginal and angular gyri (SMG/AG) were spared. This finding realised a double dissociation with a previously reported patient, who despite lesions in the SMG/AG did not have a multiplication impairment (van Harskamp et al., 2002). The previously suggested crucial role of the SMG/AG in the retrieval of simple multiplication facts is therefore poorly supported (Cohen et al., 2000; Lee, 2000).
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2005-12-15 | Cortex; a journal devoted to the study of the nervous system and behavior |