BIROn - Birkbeck Institutional Research Online

Contrasting effects of vocabulary knowledge on temporal and parietal brain structure across lifespan

Richardson, Fiona M. and Thomas, Michael S.C. and Filippi, Roberto and Harth, H. and Price, C.J. (2010) Contrasting effects of vocabulary knowledge on temporal and parietal brain structure across lifespan. Journal of Cognitive Neuroscience 22 (5), pp. 943-954. ISSN 0898-929X.

[img]
Preview
Text (Publisher's proof)
2878.pdf - Published Version

Download (906Kb) | Preview
Official URL: http://dx.doi.org/10.1162/jocn.2009.21238

Abstract

Using behavioral, structural, and functional imaging techniques, we demonstrate contrasting effects of vocabulary knowledge on temporal and parietal brain structure in 47 healthy volunteers who ranged in age from 7 to 73 years. In the left posterior supramarginal gyrus, vocabulary knowledge was positively correlated with gray matter density in teenagers but not adults. This region was not activated during auditory or visual sentence processing, and activation was unrelated to vocabulary skills. Its gray matter density may reflect the use of an explicit learning strategy that links new words to lexical or conceptual equivalents, as used in formal education and second language acquisition. By contrast, in left posterior tempo- ral regions, gray matter as well as auditory and visual sentence activation correlated with vocabulary knowledge throughout lifespan. We propose that these effects reflect the acquisition of vocabulary through context, when new words are learnt within the context of semantically and syntactically related words.

Item Type: Article
School or Research Centre: Birkbeck Schools and Research Centres > School of Science > Psychological Sciences
Depositing User: Administrator
Date Deposited: 29 Nov 2010 10:50
Last Modified: 17 Apr 2013 12:33
URI: http://eprints.bbk.ac.uk/id/eprint/2878

Archive Staff Only (login required)

Edit/View Item Edit/View Item