A Structural MRI Study of Human Brain Development from Birth to 2 Years
| Autor: | Rebecca C. Knickmeyer, John H. Gilmore, Chaeryon Kang, Kathy Wilber, Robert M. Hamer, J. Keith Smith, Dianne D. Evans, Weili Lin, Sylvain Gouttard, Guido Gerig |
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| Rok vydání: | 2008 |
| Předmět: |
Male
Pathology medicine.medical_specialty Hippocampus Brain mapping Article White matter Pregnancy Internal medicine Image Processing Computer-Assisted medicine Humans Brain Mapping medicine.diagnostic_test General Neuroscience Age Factors Infant Newborn Brain Infant Magnetic resonance imaging Human brain medicine.disease Magnetic Resonance Imaging medicine.anatomical_structure Ventricle Child Preschool Brain size Cardiology Autism Female Psychology |
| Zdroj: | The Journal of Neuroscience. 28:12176-12182 |
| ISSN: | 1529-2401 0270-6474 |
| Popis: | Brain development in the first 2 years after birth is extremely dynamic and likely plays an important role in neurodevelopmental disorders, including autism and schizophrenia. Knowledge regarding this period is currently quite limited. We studied structural brain development in healthy subjects from birth to 2. Ninety-eight children received structural MRI scans on a Siemens head-only 3T scanner with magnetization prepared rapid gradient echo T1-weighted, and turbo spin echo, dual-echo (proton density and T2 weighted) sequences: 84 children at 2–4 weeks, 35 at 1 year and 26 at 2 years of age. Tissue segmentation was accomplished using a novel automated approach. Lateral ventricle, caudate, and hippocampal volumes were also determined. Total brain volume increased 101% in the first year, with a 15% increase in the second. The majority of hemispheric growth was accounted for by gray matter, which increased 149% in the first year; hemispheric white matter volume increased by only 11%. Cerebellum volume increased 240% in the first year. Lateral ventricle volume increased 280% in the first year, with a small decrease in the second. The caudate increased 19% and the hippocampus 13% from age 1 to age 2. There was robust growth of the human brain in the first two years of life, driven mainly by gray matter growth. In contrast, white matter growth was much slower. Cerebellum volume also increased substantially in the first year of life. These results suggest the structural underpinnings of cognitive and motor development in early childhood, as well as the potential pathogenesis of neurodevelopmental disorders. |
| Databáze: | OpenAIRE |
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