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在海马体中改变的DTI标尺与创伤性脑损伤后的形态和结构变化有关

Palkin Arora^1,2, Richa Trivedi³, Megha Kumari^1,4

¹Radiological, Nuclear and Imaging Sciences (RNAIS), Institute of Nuclear Medicine and Allied Sciences (INMAS), DRDO, Delhi, India.

Brain structure & function

|February 21, 2024

概括

创伤性脑损伤 (TBI) 在海马体中引起显著的微观结构变化. 在体内MRI成像显示了细胞和结构的改变,有助于诊断TBI诱导的海马体损伤.

科学领域:

神经科学是一个神经科学.
生物医学成像技术生物医学成像技术
病理学病理学病理学

背景情况:

粗和分散的创伤性脑损伤 (TBI) 是常见的,导致大脑微观结构的变化.
创伤可以导致功能障碍和认知缺陷,特别是影响海马.

研究的目的:

在TBI后纵向评估海马体的微观结构变化,使用体内MRI成像.
为了将扩散张力成像 (DTI) 发现与TBI后海马体的组织学变化相关联.

主要方法:

患有中度体重下降诱导的TBI的雄性大鼠接受了纵向体内MRI成像 (受伤后4小时至30天).
扩散张力成像 (DTI) 分析测量了明显扩散系数 (ADC),辐射扩散率 (RD) 和轴向扩散率 (AD).
组织学检查评估了微质细胞,星体细胞,以及Aβ阳性纤维和神经质斑块的存在.

主要成果:

DTI分析显示,TBI后ADC,RD和AD值显著下降.
组织学分析显示微质细胞和星体细胞在所有时间点的形态参数发生了变化.
在受伤后,海马体表现出Aβ阳性纤维和神经质斑块.

结论:

在海马体中,TBI会诱导复杂的形态,细胞和结构变化.
在体内MRI成像技术可以诊断这些TBI诱导的海马变化.
早期诊断可能有助于预防长期的功能缺陷.

关键词:

星球细胞是星球细胞.在Aβ沉积过程中,关闭式头部伤害关闭式头部伤害扩散张力成像的成像方法微质细胞中的微质细胞

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