`titrebSUMMARY`/titreb `!-- 91:'RES ST' --bNeuroplasticity and development : morphosyntax in children with early focal brain damage `!-- 92:'résumé moins' --bThis study investigates morpho-syntactic development in school aged children with pre- or peri-natal unilateral focal brain damage to better understand the process of language acquisition when there is early damage to one cerebral hemisphere. To obtain a comprehensive profile, we used two complementary contexts, a narrative task that represents a quasi-naturalistic setting, and a more constrained morphological production task that elicits Tag questions. Participants in the first task were ages 3;11 to 12;11 and included 33 children with left hemisphere damage (LHD), 19 with right hemisphere damage (RHD) and 73 age matched typically developing children (TD). The second task included children aged 4;0-16;0 years : 11 with LHD, 10 with RHD and 24 TD. The data from these children bear on three basic questions in developmental psycholinguistics and brain-language relations : 1 / the degree to which brain organization for language is specified early in development ; 2 / the extent and nature of neuroplasticity for language ; and 3 / the nature of the language acquisition process itself.