Anatomical traces of vocabulary acquisition in the adolescent brain.

Détails

ID Serval
serval:BIB_551557C70D8E
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Anatomical traces of vocabulary acquisition in the adolescent brain.
Périodique
Journal of Neuroscience
Auteur⸱e⸱s
Lee H., Devlin J.T., Shakeshaft C., Stewart L.H., Brennan A., Glensman J., Pitcher K., Crinion J., Mechelli A., Frackowiak R.S., Green D.W., Price C.J.
ISSN
1529-2401 (Electronic)
ISSN-L
0270-6474
Statut éditorial
Publié
Date de publication
2007
Volume
27
Numéro
5
Pages
1184-1189
Langue
anglais
Notes
Publication types: Comparative Study ; Journal Article ; Research Support, N.I.H., Extramural ; Research Support, Non-U.S. Gov'tPublication Status: ppublish
Résumé
A surprising discovery in recent years is that the structure of the adult human brain changes when a new cognitive or motor skill is learned. This effect is seen as a change in local gray or white matter density that correlates with behavioral measures. Critically, however, the cognitive and anatomical mechanisms underlying these learning-related structural brain changes remain unknown. Here, we combined brain imaging, detailed behavioral analyses, and white matter tractography in English-speaking monolingual adolescents to show that a critical linguistic prerequisite (namely, knowledge of vocabulary) is proportionately related to relative gray matter density in bilateral posterior supramarginal gyri. The effect was specific to the number of words learned, regardless of verbal fluency or other cognitive abilities. The identified region was found to have direct connections to other inferior parietal areas that separately process either the sounds of words or their meanings, suggesting that the posterior supramarginal gyrus plays a role in linking the basic components of vocabulary knowledge. Together, these analyses highlight the cognitive and anatomical mechanisms that mediate an essential language skill.
Mots-clé
Adolescent, Adult, Brain/anatomy & histology, Brain/physiology, Child, Female, Humans, Language Development, Learning/physiology, Magnetic Resonance Imaging/methods, Male, Vocabulary, Wechsler Scales
Pubmed
Web of science
Open Access
Oui
Création de la notice
11/09/2011 17:59
Dernière modification de la notice
20/08/2019 14:09
Données d'usage