Rafati Ali H, Ardalan Maryam, Vontell Regina T, Mallard Carina, Wegener Gregers
Translational Neuropsychiatry Unit, Department of Clinical Medicine, Aarhus University, 8000 Aarhus C, Denmark.
Institute of Neuroscience and Physiology, Centre for Perinatal Medicine and Health, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
Heliyon. 2022 Jul 8;8(7):e09871. doi: 10.1016/j.heliyon.2022.e09871. eCollection 2022 Jul.
The dynamic geometry of neuronal development is an essential concept in theoretical neuroscience. We aimed to design a mathematical model which outlines stepwise in an innovative form and designed to model neuronal development geometrically and modelling spatially the neuronal-electrical field interaction. We demonstrated flexibility in forming the cell and its nucleus to show neuronal growth from inside to outside that uses a fractal cylinder to generate neurons (pyramidal/sphere) in form of mathematically called 'surface of revolution'. Furthermore, we verified the effect of the adjacent neurons on a free branch from one-side, by modelling a 'normal vector surface' that represented a group of neurons. Our model also indicated how the geometrical shapes and clustering of the neurons can be transformed mathematically in the form of vector field that is equivalent to the neuronal electromagnetic activity/electric flux. We further simulated neuronal-electrical field interaction that was implemented spatially using Van der Pol oscillator and taking Laplacian vector field as it reflects biophysical mechanism of neuronal activity and geometrical change. In brief, our study would be considered a proper platform and inspiring modelling for next more complicated geometrical and electrical constructions.
神经元发育的动态几何学是理论神经科学中的一个重要概念。我们旨在设计一个数学模型,该模型以创新的形式逐步勾勒出来,旨在从几何学角度对神经元发育进行建模,并对神经元-电场相互作用进行空间建模。我们展示了在形成细胞及其细胞核方面的灵活性,以显示从内到外的神经元生长,这使用分形圆柱体以数学上称为“旋转曲面”的形式生成神经元(锥体/球体)。此外,我们通过对代表一组神经元的“法向量曲面”进行建模,验证了相邻神经元对一侧自由分支的影响。我们的模型还表明,神经元的几何形状和聚类如何以矢量场的形式进行数学变换,该矢量场等同于神经元电磁活动/电通量。我们进一步模拟了神经元-电场相互作用,该相互作用在空间上使用范德波尔振荡器实现,并采用拉普拉斯矢量场,因为它反映了神经元活动和几何变化的生物物理机制。简而言之,我们的研究将被视为一个合适的平台,并为未来更复杂的几何和电气结构提供启发性的建模。