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在与年龄相关的黄斑退化中加速的大脑缩,微观结构衰退和连接病变
Jacques A Stout1, Ali Mahzarnia2, Rui Dai2
1Brain Imaging and Analysis Center, Duke University Medical Center, Durham, NC 27710, USA.
Biomedicines
|January 23, 2024
概括
与年龄相关的黄斑变性 (AMD) 与认知能力下降有关,显示大脑体积和白质完整性的变化. 这些广泛的脑部变化表明,AMD影响了视觉路径之外的整体脑衰老.
科学领域:
- 神经科学是一个神经科学.
- 眼科医生 眼科 眼科
- 放射学 放射学是一门学科.
背景情况:
- 与年龄相关的黄斑变性 (AMD) 越来越多地与认知障碍有关.
- 对于AMD对大脑衰老轨迹的确切影响仍然不完全理解.
研究的目的:
- 通过使用纵向扩散核磁共振 (MRI) 来研究AMD患者大脑变化的位置,程度和时间动态.
- 探索视网膜健康和AMD中的大脑结构/功能之间的关系.
主要方法:
- 长度扩散MRI研究,40名参与者 (20名AMD,20名对照) 超过2年.
- 基于voxel的形态测量和扩散张力成像分析,以评估大脑体积和白质的完整性 (分数无otropy-FA).
- 捆绑分析以检查特定的白质道,包括语言间和语言-小脑连接.
主要成果:
- 在基线,AMD参与者在状,状和带状环环中显示灰质体积减少.
- 在2年内,AMD参与者表现出叶皮质体积减小的加速,叶和上额叶皮质体积减小的FA.
- 在基线时,Lingual gyrus流线长度在AMD中减少,在随访时观察到FA相关捆绑的差异,表明视力丧失的下游影响.
结论:
- AMD与大脑广泛的结构变化有关,影响认知和视觉处理网络.
- 这些发现表明,AMD加速了大脑的衰老,并影响了超越主要视觉处理区域的神经通路.
- 这项研究强调了视网膜健康和大脑完整性之间的重要联系,视力损失具有下游的神经后果.
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