Marcotte A C, LaBarba R C
Brain Lang. 1987 Jul;31(2):276-300. doi: 10.1016/0093-934x(87)90075-7.
The cerebral lateralization patterns for speech production in 57 normal hearing and deaf adolescents were studied using the dual-task paradigm. Normal hearing subjects showed left hemispheric dominance for speech production, whereas both the congenitally deaf and those with early acquired deafness showed atypical cerebral representation for speech production. Deaf subjects whose hearing loss occurred after 2 years of age displayed a pattern of mixed cerebral dominance related to complexity of speech production or task difficulty. These results are interpreted as evidence for a relationship between linguistic/cognitive stage of development and the ontogenesis of cerebral lateralization. A parallel lateralization hypothesis of left cerebral dominance for speech production is offered.
采用双任务范式研究了57名听力正常和失聪青少年言语产生的大脑半球侧化模式。听力正常的受试者在言语产生方面表现出左半球优势，而先天性失聪者和早期获得性失聪者在言语产生方面均表现出非典型的大脑表征。2岁后出现听力损失的失聪受试者表现出与言语产生复杂性或任务难度相关的混合大脑优势模式。这些结果被解释为语言/认知发展阶段与大脑半球侧化个体发生之间关系的证据。提出了言语产生左脑优势的平行侧化假说。
