Age of acquisition effects on the functional organization of language in the adult brain  

Oleh:

Mayberry, Rachel I. ; Chen, Jen-Kai ; Witcher, Pamela ; Klein, Denise

Jenis: Article from Journal - ilmiah internasional
Dalam koleksi: Brain and Language (Full Text) vol. 119 no. 1 (2011), page 16-29.
Topik: Age of acquisition; Critical period; fMRI; Sign language; ASL; Grammatical judgment; Language processing; Broca’s area; Visual processing; Brain development
Fulltext: 119_01_Mayberry.pdf (1.44MB)

Isi artikel

Using functional magnetic resonance imaging (fMRI), we neuroimaged deaf adults as they performed two linguistic tasks with sentences in American Sign Language, grammatical judgment and phonemic-hand judgment. Participants’ age-onset of sign language acquisition ranged from birth to 14 years; length of sign language experience was substantial and did not vary in relation to age of acquisition. For both tasks, a more left lateralized pattern of activation was observed, with activity for grammatical judgment being more anterior than that observed for phonemic-hand judgment, which was more posterior by comparison. Age of acquisition was linearly and negatively related to activation levels in anterior language regions and positively related to activation levels in posterior visual regions for both tasks.

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