* Optic radiation structure and anatomy in the normally developing brain determined using diffusion MRI and tractography.
- The optic radiation (OR) is a component of the visual system known to be myelin mature very early in life. Diffusion tensor imaging (DTI) and its unique ability to reconstruct the OR in vivo were used to study structural maturation through analysis of DTI metrics in a cohort of 90 children aged 5-18 years. As the OR is at risk of damage during epilepsy surgery, we measured its position relative to characteristic anatomical landmarks. Anatomical distances, DTI metrics and volume of the OR were investigated for age, gender and hemisphere effects. We observed changes in DTI metrics with age comparable to known trajectories in other white matter tracts. Left lateralization of DTI metrics was observed that showed a gender effect in lateralization. Sexual dimorphism of DTI metrics in the right hemisphere was also found. With respect to OR dimensions, volume was shown to be right lateralised and sexual dimorphism demonstrated for the extent of the left OR. The anatomical results presented for the OR have potentially important applications for neurosurgical planning.
=>重要な, 有力な, 重大な, 大切な
Overview of adj important
The adj important has 5 senses (first 4 from tagged texts)
1. (146) important, of import -- (of great significance or value; "important people"; "the important
questions of the day")
2. (4) significant, important -- (important in effect or meaning; "a significant change in tax
laws"; "a significant change in the Constitution"; "a significant contribution"; "significant
details"; "statistically significant")
3. (2) crucial, important -- (of extreme importance; vital to the resolution of a crisis; "a crucial
moment in his career"; "a crucial election"; "a crucial issue for women")
4. (1) authoritative, important -- (having authority or ascendancy or influence; "an important
official"; "the captain's authoritative manner")
5. important -- (having or suggesting a consciousness of high position; "recited the decree with an
important air"; "took long important strides in the direction of his office")
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