Fryer Susanna L, Frank Lawrence R, Spadoni Andrea D, Theilmann Rebecca J, Nagel Bonnie J, Schweinsburg Alecia D, Tapert Susan F
San Diego State University/University of California-San Diego, Joint Doctoral Program in Clinical Psychology, 6363 Alvarado Court, San Diego, CA 92120, USA.
Brain Cogn. 2008 Jul;67(2):225-33. doi: 10.1016/j.bandc.2008.01.009. Epub 2008 Mar 17.
Diffusion tensor imaging (DTI) has revealed microstructural aspects of adolescent brain development, the cognitive correlates of which remain relatively uncharacterized.
DTI was used to assess white matter microstructure in 18 typically developing adolescents (ages 16-18). Fractional anisotropy (FA) and mean diffusion (MD) were evaluated within the splenium and body of the corpus callosum in relation to cognitive performance.
Visuospatial construction abilities were associated with white matter integrity in both the splenium and body of the corpus callosum, while only splenium integrity was associated with language and psychomotor function.
Results suggest that, for typically developing adolescents, white matter coherence positively relates to visuospatial, psychomotor, and language skills. These findings may have implications for the cognitive functioning of clinical populations in which typical white matter development is altered.
扩散张量成像(DTI)揭示了青少年大脑发育的微观结构方面,但其认知相关性仍相对未得到充分描述。
使用DTI评估18名发育正常的青少年(年龄16 - 18岁)的白质微观结构。在胼胝体压部和体部评估各向异性分数(FA)和平均扩散率(MD)与认知表现的关系。
视觉空间构建能力与胼胝体压部和体部的白质完整性相关,而只有压部完整性与语言和精神运动功能相关。
结果表明,对于发育正常的青少年,白质连贯性与视觉空间、精神运动和语言技能呈正相关。这些发现可能对典型白质发育发生改变的临床人群的认知功能具有启示意义。