Devenny D A, Silverman W P
Institute for Basic Research in Developmental Disabilities, New York State Office of Mental Retardation and Developmental Disabilities, Staten Island. 10314.
J Ment Defic Res. 1990 Jun;34 ( Pt 3):253-60. doi: 10.1111/j.1365-2788.1990.tb01536.x.
The relationship between speech dysfluency and manual lateralization was studied in 31 adults with Down's syndrome. Analysis of speech samples from videotapes indicated that frequency of dysfluency ranged from normal to very severe; 42% of the subjects were stutterers. Manual lateralization was measured by the demonstrated use of five objects (pencil, comb, toothbrush, ball and scissors); 61% of the subjects had a clear right-hand preference, 13% a left-hand preference, and the remaining subjects (39%) were mixed-handed. Increased dysfluency was associated with increased non-right-handedness, and this finding could not be explained by reference to either generalized linguistic or intellectual deficits. Results suggest individual variation in the speech motor control system in adults with Down's syndrome which may be associated with anomalous cerebral dominance.
对31名唐氏综合征成年人的言语不流畅与手部偏侧化之间的关系进行了研究。对录像带中的言语样本分析表明，不流畅的频率从正常到非常严重不等；42%的受试者是口吃者。通过对使用五种物品（铅笔、梳子、牙刷、球和剪刀）的表现来测量手部偏侧化；61%的受试者明显偏好右手，13%偏好左手，其余受试者（39%）两手都用。不流畅程度的增加与非右利手的增加有关，而且这一发现无法用一般的语言或智力缺陷来解释。结果表明唐氏综合征成年人的言语运动控制系统存在个体差异，这可能与异常的大脑优势有关。
