Investigating the relation between striatal volume and IQ.

Authors

Penny A MacDonald, The Brain and Mind Institute, Natural Sciences Centre, Room 226, University of Western Ontario, London, Ontario, Canada & Department of Clinical Neurological Sciences, University of Western Ontario, London, Ontario, CanadaFollow
Hooman Ganjavi, Department of Psychiatry, University of Western Ontario, London, Ontario, Canada
D Louis Collins, McConnell Brain Imaging Centre, Montreal Neurological Institute, McGill University, Montréal, Québec, Canada
Alan C Evans, McConnell Brain Imaging Centre, Montreal Neurological Institute, McGill University, Montréal, Québec, Canada
Sherif Karama, McConnell Brain Imaging Centre, Montreal Neurological Institute, McGill University, Montréal, Québec, Canada & Department of Psychiatry, Douglas Mental Health University Institute, McGill University, Montréal, Québec, Canada

Document Type

Article

Publication Date

3-1-2014

Journal

Brain Imaging and Behavior

Volume

8

Issue

1

First Page

52

Last Page

59

URL with Digital Object Identifier

10.1007/s11682-013-9242-3

Abstract

The volume of the input region of the basal ganglia, the striatum, is reduced with aging and in a number of conditions associated with cognitive impairment. The aim of the current study was to investigate the relation between the volume of striatum and general cognitive ability in a sample of 303 healthy children that were sampled to be representative of the population of the United States. Correlations between the WASI-IQ and the left striatum, composed of the caudate nucleus and putamen, were significant. When these data were analyzed separately for male and female children, positive correlations were significant for the left striatum in male children only. This brain structure-behavior relation further promotes the increasingly accepted view that the striatum is intimately involved in higher order cognitive functions. Our results also suggest that the importance of these brain regions in cognitive ability might differ for male and female children.