Shoji Hiroaki, Koizumi Natsuko, Ozaki Hisaki
Laboratory of Physiology, Faculty of Education, Ibaraki University, 2-1-1 Bunkyo, Mito 310-8512, Japan.
Res Dev Disabil. 2009 Mar-Apr;30(2):219-28. doi: 10.1016/j.ridd.2008.03.004. Epub 2008 May 14.
Linguistic lateralization in 10 adolescents with Down syndrome (average age: 15.7 years), 15 adolescents with intellectual disabilities of unknown etiology (average age: 17.8 years), 2 groups of children without disabilities (11 children, average age: 4.7 years; 10 children, average age: 8.5 years), and 14 adolescents without disabilities (average age: 18.7 years) was examined, using a dichotic monitoring test (DMT). Different Japanese words with 2 consonant-vowel syllables were presented to each ear simultaneously. Participants pressed a button when they heard the target word. The younger children without disabilities and the adolescents with intellectual disabilities exhibited a right-ear advantage, whereas the adolescents with Down syndrome showed the reverse pattern, i.e., a left-ear advantage. These results suggest that there is atypical linguistic lateralization in adolescents with Down syndrome.
使用双耳分听监测测试（DMT）对10名唐氏综合征青少年（平均年龄：15.7岁）、15名病因不明的智力残疾青少年（平均年龄：17.8岁）、两组无残疾儿童（11名儿童，平均年龄：4.7岁；10名儿童，平均年龄：8.5岁）以及14名无残疾青少年（平均年龄：18.7岁）的语言侧化进行了检查。同时向每只耳朵呈现由两个辅音-元音音节组成的不同日语单词。参与者听到目标单词时按下按钮。无残疾的年幼儿童和智力残疾青少年表现出右耳优势，而唐氏综合征青少年则呈现相反的模式，即左耳优势。这些结果表明唐氏综合征青少年存在非典型的语言侧化。
