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Lesion Mapping of Cognitive Abilities Linked to Intelligence
Journal article   Open access   Peer reviewed

Lesion Mapping of Cognitive Abilities Linked to Intelligence

Jan Gläscher, Daniel Tranel, Lynn K Paul, David Rudrauf, Chris Rorden, Amanda Hornaday, Thomas Grabowski, Hanna Damasio and Ralph Adolphs
Neuron (Cambridge, Mass.), Vol.61(5), pp.681-691
03/12/2009
DOI: 10.1016/j.neuron.2009.01.026
PMCID: PMC2728583
PMID: 19285465
url
https://doi.org/10.1016/j.neuron.2009.01.026View
Published (Version of record) Open Access

Abstract

The Wechsler Adult Intelligence Scale (WAIS) assesses a wide range of cognitive abilities and impairments. Factor analyses have documented four underlying indices that jointly comprise intelligence as assessed with the WAIS: verbal comprehension (VCI), perceptual organization (POI), working memory (WMI), and processing speed (PSI). We used nonparametric voxel-based lesion-symptom mapping in 241 patients with focal brain damage to investigate their neural underpinnings. Statistically significant lesion-deficit relationships were found in left inferior frontal cortex for VCI, in left frontal and parietal cortex for WMI, and in right parietal cortex for POI. There was no reliable single localization for PSI. Statistical power maps and cross-validation analyses quantified specificity and sensitivity of the index scores in predicting lesion locations. Our findings provide comprehensive lesion maps of intelligence factors, and make specific recommendations for interpretation and application of the WAIS to the study of intelligence in health and disease.
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