کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6028584 | 1580920 | 2014 | 11 صفحه PDF | دانلود رایگان |
- Proposes various growth models for modeling MWF trajectories
- Demonstrates modeling of MWF trajectories of 122 male infants under 5Â years
- Statistically compares tested models using Bayesian information criterion
- Generates first four-dimensional model of whole-brain myelination of early childhood
- Discusses the utility of developed model
An emerging hypothesis in developmental and behavioral disorders is that they arise from disorganized brain messaging or reduced connectivity. Given the importance of myelin to efficient brain communication, characterization of myelin development in infancy and childhood may provide salient information related to early connectivity deficits. In this work, we investigate regional and whole brain growth trajectories of the myelin water fraction, a quantitative magnetic resonance imaging measure sensitive and specific to myelin content, in data acquired from 122 healthy male children from 3 to 60Â months of age. We examine common growth functions to find the most representative model of myelin maturation and subsequently use the best of these models to develop a continuous population-averaged, four-dimensional model of normative myelination. Through comparisons with an independent sample of 63 male children across the same age span, we show that the developed model is representative of this population. This work contributes to understanding the trajectory of myelination in healthy infants and toddlers, furthering our knowledge of early brain development, and provides a model that may be useful for identifying developmental abnormalities.
Journal: NeuroImage - Volume 84, 1 January 2014, Pages 742-752