社会行为塑造了同类性别的下丘脑神经组合表现
Ryan Remedios1, Ann Kennedy1, Moriel Zelikowsky1
1Division of Biology and Biological Engineering 156-29, Tianqiao and Chrissy Chen Institute for Neuroscience, California Institute of Technology, Pasadena, California 91125, USA.
Nature
|October 21, 2017
概括
通过改变大脑下丘脑的神经表现来塑造小鼠的天生的行为. 这表明本能行为并非完全固有,而是可以通过学习来改变.
科学领域:
- 神经科学
- 行为生物学
- 内分泌学
背景情况:
- 天生的行为对于动物的生存和繁殖至关重要.
- 遗传社会行为的神经基础及其可塑性潜力尚未得到充分理解.
- 已知腹侧VMHvl (VMHvl) 下丘脑,特别是Esr1+神经元,可以调节雄性动物的社会行为.
研究的目的:
- 通过社会经验来研究内在社会行为的神经表现.
- 根据性和社会相互作用来确定VMH1中的特定神经组合是否适应.
- 探索深层皮层结构的可塑性,
主要方法:
- 利用微内镜在社交交互期间对雄性小鼠VMHvl Esr1+神经元的神经元活动进行成像.
- 在未经验和经验丰富的成年雄性小鼠中,对雄性和雌性同物反应的神经元活动模式进行比较.
- 操纵社会互动水平以评估它们对神经组合形成的影响.
主要成果:
- 没有经验的雄性显示男性和女性入侵者的重叠神经表征.
- 在经验丰富的男性中,性别特异的神经元集团逐渐分离.
- 没有身体互动的有限社会调查并没有导致集体分歧.
- 即使是短暂的性经历 (30分钟) 也会导致组合分离和随后的侵略行为.
结论:
- 天生的社会行为不仅是固定的,而且表现出社会经验所影响的显著可塑性.
- 在下丘脑中神经表现动态地适应社会遭遇, 塑造行为反应.
- 这项研究揭示了深层,进化古老的大脑结构的经验可塑性.
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