Mechanical forces in cerebral cortical folding: a review of measurements and models.

Mechanical forces in cerebral cortical folding: a review of measurements and models.
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DOI:
10.1016/j.jmbbm.2013.02.018
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发表时间:
2014-01
影响因子:
3.9
通讯作者:
Kroenke, C. D.
Kroenke, C. D.
中科院分区:
工程技术2区
文献类型:
--
作者:
Bayly, P. V.;Taber, L. A.;Kroenke, C. D.

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大脑皮层表面的折叠是人类大脑发育的一个关键过程,然而,尽管经过数十年的间接研究和推测,该过程的机制仍然不完全清楚。主要假设集中在皮质圆周扩张、径向生长和神经元纤维(轴突)内部张力的作用。在本文中,我们回顾了生长和形态发生的数学模型的进展以及新的实验数据,这些数据共同有望阐明皮质折叠的机械基础。最近的实验研究不仅阐明了皮层发育的基本细胞和分子过程,还阐明了发育中的大脑的压力状态和机械行为。数学模型和生物力学数据的结合提供了一种客观、定量地评估假设机制的手段,并在给定合理的假设和合理的参数值的情况下确保它们符合物理定律。
Folding of the cerebral cortical surface is a critical process in human brain development, yet despite decades of indirect study and speculation the mechanics of the process remain incompletely understood. Leading hypotheses have focused on the roles of circumferential expansion of the cortex, radial growth, and internal tension in neuronal fibers (axons). In this article, we review advances in the mathematical modeling of growth and morphogenesis and new experimental data, which together promise to clarify the mechanical basis of cortical folding. Recent experimental studies have illuminated not only the fundamental cellular and molecular processes underlying cortical development, but also the stress state and mechanical behavior of the developing brain. The combination of mathematical modeling and biomechanical data provides a means to evaluate hypothesized mechanisms objectively and quantitatively, and to ensure that they are consistent with physical law, given plausible assumptions and reasonable parameter values.
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