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风险/奖励决策和前叶皮层甲醇胺调节的乱是由轻度创伤性脑损伤引起的
Christopher P Knapp1, Eleni Papadopoulos1, Jessica A Loweth1
1Department of Cell Biology and Neuroscience, Rowan-Virtua School of Translational Biomedical Engineering and Sciences, Stratford, NJ, USA.
Behavioural brain research
|April 18, 2024
概括
重复轻度创伤性脑损伤 (rmTBI) 改变了冒险行为和大脑化学成分,其影响因受伤后的性别和时间而异. 这些发现凸显了rmTBI后前额叶皮质的性别特异性变化.
科学领域:
- 神经科学是一个神经科学.
- 行为神经科学 行为神经科学
- 创伤性脑损伤研究研究
背景情况:
- 轻度创伤性脑损伤 (mTBI) 影响认知功能,包括冒险行为.
- 重复轻度TBI (rmTBI) 和性别特异性结局的影响在很大程度上是未知的.
- 前额叶皮层 (PFC) 和其类甲醇胺系统对于风险/回报处理至关重要,并且受到TBI的影响.
研究的目的:
- 研究rmTBI对风险/奖励决策行为的影响.
- 在rmTBI之后,在PFC内检查catecholamine调节的性别特异性变化.
- 描述由rmTBI引起的依赖时间的变化.
主要方法:
- 鼠被施加虚假,单次 (smTBI) 或三次闭头受控皮质冲击 (CH-CCI) 损伤.
- 风险/回报决策使用概率计价任务 (PDT) 进行评估.
- 在PFC分区域测量了氨酸氧酶 (TH) 和北上腺素再吸收载体 (NET) 的水平.
主要成果:
- 在受伤后的第一周,mTBI增加了风险选择的偏好.
- 在rmTBI后的第四周,男性表现出延迟的处理速度 (增加风险选择的延迟).
- 女性在 smTBI 后表现出增加的 OFC TH,而两性在 rmTBI 后表现出减少的 OFC NET.
结论:
- 轨道前皮层 (OFC) 在rmTBI后容易受到catecholamine失衡的影响.
- rmTBI在决策和 катехо拉胺监管中引发了依赖时间和性别的变化.
- 这些发现表明PFC区在TBI诱导的行为和神经化学变化中的差异性参与.
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