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在小鼠运输反应的基础上,有触觉机制和影响因素
Zheyi Ni1,2, Connor Neifert1,3, Arturo Rosete1,4
1Neural Systems & Behavior, Marine Biological Laboratory, 7 MBL Street, Woods Hole, MA 02543 USA.
bioRxiv : the preprint server for biology
|September 4, 2024
概括
父母的接送触发了幼鼠的运输反应,其特点是平静和不动. 前部部抓住和失去地面接触是驱动这些行为安全运输的关键感官输入.
科学领域:
- 神经科学是一个神经科学.
- 动物行为 动物行为
- 发展生物学 发展生物学
背景情况:
- 其他哺乳动物,包括幼动物,在被父母起时表现出一种"运输反应".
- 这种反应涉及平静,不动和特定的肢体调整,以促进父母的运输.
研究的目的:
- 为了研究大鼠幼运输反应背后的感觉机制.
- 为了识别特定的刺激和神经通路涉及到这种行为.
主要方法:
- 在小老鼠身上操纵抓住位置 (前部与后部子).
- 应用轻轻的摇动和翻译来模拟父母的运输.
- 在各种身体部位上测试触觉刺激,并评估对地面接触的反应.
- 使用FM1-43膜标记来识别前部皮肤中的 afferent神经终端.
- 检查体感皮质中细胞染色体氧化酶活性,以检查与年龄相关的变化.
主要成果:
- 前部部抓住强烈地引起不动和脚折叠,后部抓住的影响较小.
- 运输反应通过摇和翻译来增强,模仿父母的携带.
- 在横向抓取时前腿的调整可以优化小狗的重心.
- 大多数身体部位的触觉刺激不会显著影响反应,但失去地面接触会破坏反应.
- 在部前部皮肤中观察到密集的内化,这表明它的关键作用.
- 与年龄相关的皮质活动下降与老年幼犬的运输反应减少相关.
结论:
- 子前部抓住和失去地面接触的感觉是小鼠运输反应的主要触发因素.
- 这些刺激启动了舒缓和姿势调整,这对于父母的运输至关重要.
- 密的部前部肌肤在调解这些行为中起着关键作用.
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