在神经纤维素瘤类型1中被破坏的前端对象动力学:在工作记忆过程中降低灵敏度和非典型调制
Marta C Litwińczuk1, Shruti Garg2,3, Caroline Lea-Carnall1,4
1School of Health Sciences, University of Manchester, Manchester, UK.
Human brain mapping
|February 3, 2026
概括
神经纤维素瘤类型1 (NF1) 涉及非典型的大脑连接,影响工作记忆. 患有NF1的个体在认知任务过程中表现出前对对面区域内明显的自我连接模式.
科学领域:
- 神经科学是一个神经科学.
- 神经发育障碍 神经发育障碍
- 认知神经科学 认知神经科学
背景情况:
- 神经纤维素瘤类型1 (NF1) 是一种与认知缺陷相关的遗传疾病,特别是在工作记忆中.
- 在NF1个体中,在工作记忆任务中观察到异常的大脑激活模式.
- 假设前端对面的有效连接性改变是这些工作记忆困难的基础.
研究的目的:
- 为了调查NF1.1青少年在工作记忆期间前两侧有效连接的变化.
- 具体来说,要检查在前端对象网络中的自我连接 (内在的抑制影响).
- 测试NF1具有更大的抑制性内在自我连接的特征的假设.
主要方法:
- 功能磁共振成像 (fMRI) 在口头工作记忆任务中用于43名NF1青少年和26名对照.
- 应用了动态因果建模 (DCM) 来估计双边前端对象网络 (dlPFC, vlPFC, SPG, IPG) 内的有效连接.
- 用参数实证贝叶斯与贝叶斯模型缩小和离开一个的交叉验证来分析群体差异和可概括性.
主要成果:
- NF1参与者在左背侧前额皮质 (dlPFC) 和左下侧回 (IPG) 中表现出更大的内源性自我连接性.
- 在NF1组中,工作记忆调制显示左腹侧前额皮层 (vlPFC) 的内在连接性增加,但左 dlPFC,左上顶顶回 (SPG) 和右 IPG 的连接性降低.
- 连接参数与诊断状态正相关,表明预测值.
结论:
- 在NF1参与者的特定地区内源性自我连接性增加表明区域对输入的敏感性降低.
- 在NF1中,工作记忆处理涉及到复杂的调制连接模式,超出了简单的增强抑制.
- 在NF1中对工作记忆需求的非典型适应可能源于内生和任务唤起的连接模式之间的差异.
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