皮层微观结构和半球专业化-A扩散成像分析在年轻人和老年人
Paweł P Wróbel1, Hanna Braaß1, Benedikt M Frey1
1Department of Neurology, University Medical Center Hamburg-Eppendorf, Hamburg, Germany.
The European journal of neuroscience
|August 29, 2024
概括
皮质扩散张力成像 (DTI) 揭示了大脑侧面化的微结构专业化和与年龄相关的变化,为神经可塑性和衰老中的缩提供了洞察力. 这与皮质厚度形成鲜明对比,皮质厚度没有表现出侧面化的年龄相关变化.
科学领域:
- 神经科学是一个神经科学.
- 放射学 放射学是一门学科.
- 老年学是一门学科.
背景情况:
- 皮层可塑性对于理解衰老中的补偿机制和结构储备至关重要.
- 皮层厚度 (CT) 提供了对神经可塑性病理生理学的有限洞察力,与微观结构特征不同.
- 扩散张力成像 (DTI) 测量如分数异构性,轴向扩散性和辐射扩散性提供皮质微观结构变化的敏感指标.
研究的目的:
- 通过皮质DTI研究半球专业化的微观结构相关物.
- 检查与年龄有关的影响,对皮质DTI参数的横向化.
- 为了比较DTI测量和CT之间的年龄依赖的横向化模式.
主要方法:
- 分析了91名健康的年轻人和老年人的DTI和CT数据.
- 从Destrieux地图集中的区域提取数据.
- 评估扩散度 (微分异型,轴扩散度,辐射扩散度) 和CT的横向化和年龄效应.
主要成果:
- 扩散测量表明,在专门的运动,语言,视觉,听觉和下皮层中出现了横向化.
- 在前额,角,上和侧皮层中观察到与年龄相关的DTI测量的横向化增加.
- 皮层厚度 (CT) 在横向化方面没有表现出任何年龄相关的变化.
结论:
- 皮层DTI有效地捕获与功能专业化相关的微结构性质,与组织学发现保持一致.
- 在前额头和头顶区域内的扩散措施的与年龄相关的变化可能会揭示健康衰老中与缩相关的可塑性.
- 与CT相比,DTI提供了与年龄相关的微观结构变化和横向化的更敏感的测量.
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