在远离发病的亨廷顿病基因扩展的年轻成年人中发现持续注意力受损和功能连接性改变的发现
Christelle Langley1,2, Michela Leocadi3, Nicola Z Hobbs3
1Department of Psychiatry, University of Cambridge, Cambridge, UK.
Alzheimer's & dementia : the journal of the Alzheimer's Association
|January 13, 2026
概括
患有亨廷顿病基因扩展 (HDGE) 的年轻人表现出早期和持续的注意力缺陷. 这些认知障碍与大脑网络功能连接的改变有关,这表明运动症状出现之前的早期变化.
科学领域:
- 神经科学是一个神经科学.
- 认知科学 认知科学
- 遗传学 是一个遗传学.
背景情况:
- 认知障碍是亨廷顿病 (HD) 的决定性特征.
- 早期发现认知功能障碍对于了解疾病进展至关重要.
研究的目的:
- 为了研究持续的注意力和功能性大脑连接在年轻的成年人与亨廷顿病基因扩展 (HDGE).
- 为了确定注意力缺陷是否存在于HDGE的早期并随着时间的推移而持续存在.
- 探索HDGE中注意力缺陷的神经基础.
主要方法:
- 在71名参与者 (43名HDGE,28名对照) 的长度研究,持续时间约4.7年.
- 使用剑桥神经心理测试自动化电池 (CANTAB) 快速视觉信息处理任务.
- 使用休息状态功能磁共振成像 (fMRI) 专注于与注意力相关的感兴趣区域.
主要成果:
- 与对照组相比,HDGE个体的持续注意力明显较差 (padj = 0.007).
- 在4.7年的随访期间,没有观察到持续注意力的显著下降.
- 功能连接分析揭示了注意力网络 (头 - 眼皮,眼形 - 轨道) 的群体差异,以及前额和头顶区域的时间变化.
结论:
- 持续的注意力缺陷是HDGE年轻人早期和持续的特征.
- 与注意力相关的大脑回路中的功能连接的改变与这些缺陷有关.
- 注意力可以作为HDGE的早期认知生物标志物,反映出症状前的大脑变化.
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