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Victoria R Heimer-McGinn1, Taylor B Wise2, Emma R Halter3
1Department of Psychology and Program in Neuroscience, Providence College, United States; Department of Psychology, Roger Williams University, United States.
Neurobiology of learning and memory
|November 1, 2024
概括
动物背部后壁皮层 (dPPC) 病变会损害持续的注意力和处理速度. 补偿机制有助于恢复,但代价是响应速度,这表明dPPC.
科学领域:
- 神经科学是一个神经科学.
- 认知神经科学 认知神经科学
- 动物模型 动物模型
背景情况:
- 人体后壁皮质 (PPC) 对于持续的注意力至关重要,背部区域支持自上而下的处理和腹部区域自下而上的处理.
- 动物PPC在持续的注意力和其子区域之间的潜在功能解离中的作用仍然不清楚.
研究的目的:
- 在动物模型中调查背部PPC (dPPC) 在持续注意力方面的贡献.
- 探索动物PPC中上下和下向上注意力处理之间的潜在功能解离.
主要方法:
- 在老鼠中使用了五个选择的连续反应时间任务 (5CSRTT).
- 具有神经毒性dPPC病变的老鼠与假操作的对照动物之间的行为表现比较.
主要成果:
- 被dPPC损伤的老鼠最初显示出精度下降和处理速度减慢.
- 康复后缺失增加表明持续的注意力缺陷,独立于动机或移动性变化.
- 受伤的老鼠在全球范围内表现出更长的响应延迟,这表明处理速度降低,但没有影响冲动性或强迫性.
结论:
- 动物的dPPC参与调节持续的注意力,特别是支持目标驱动的注意力.
- 有证据表明,在动物PPC中,有功能解离,用于上下与下向上的注意力处理.
- 补偿机制可以支持dPPC损坏后持续的注意力,但处理速度的缺陷.
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