相关实验视频
Updated: Feb 8, 2026
07:44
Localization of the Locus Coeruleus in the Mouse Brain
Published on: March 7, 2019
19.2K
在小鼠下丘脑中对侵略位点的功能性识别
Dayu Lin1, Maureen P Boyle, Piotr Dollar
1Division of Biology 216-76, California Institute of Technology, 1201 East California Boulevard, Pasadena, California 91125, USA. dayu.lin@nyumc.org
Nature
|February 11, 2011
概括
在雄性小鼠中,特定的下丘脑神经元的光遗传刺激会触发侵略性. 沉默这些神经元抑制了战斗,揭示了侵略和交配行为的独特的神经回路.
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
- 神经生物学 神经生物学 神经生物学
背景情况:
- 低垂体区域的电刺激可以诱导动物的攻击行为.
- 精确的神经回路及其与交配行为的关系仍然不清楚.
- 脑刺激引起的侵略性以前没有在小鼠中被证明.
研究的目的:
- 通过对小鼠进行基因操纵,研究特定的下丘脑神经元在侵略中的作用.
- 为了确定腹中介质下丘脑 (VMHvl) 的腹侧部分的光遗传刺激是否会引起攻击行为.
- 检查VMHvl神经元对于自然攻击的必要性及其与交配电路的关系.
主要方法:
- 在雄性小鼠中对VMHvl神经元进行光遗传和药物遗传操纵.
- 在神经刺激后观察攻击行为.
- 通过药物遗传沉默可逆抑制侵略性.
- 在社交互动期间立即进行早期基因分析和单单元记录.
主要成果:
- 对VMHvl神经元的光遗传刺激导致雄性小鼠对雌性,无生命物体和其他雄性产生攻击性.
- 药物遗传抑制VMHvl神经元可逆地抑制了男性之间的侵略.
- 确定了VMHvl内的不同神经元子群,用于战斗和交配行为.
- 在攻击期间激活的神经元被发现在交配期间被抑制.
结论:
- 在VMHvl中的特定神经元足以在雄性小鼠中引起侵略性.
- VMHvl神经元对于自然发生的男性之间的侵略是必要的.
- 在VMHvl中有一个神经基质,用于侵略和交配行为之间的竞争.
更多相关视频
06:00Cortex-, Hippocampus-, Thalamus-, Hypothalamus-, Lateral Septal Nucleus- and Striatum-specific In Utero Electroporation in the C57BL/6 Mouse
Published on: January 18, 2016
29.0K
11:48Genetic Manipulation of the Mouse Developing Hypothalamus through In utero Electroporation
Published on: July 24, 2013
16.5K
相关概念视频
01:26Locus of Control
227
Locus of control describes how individuals perceive the causes of events in their lives, influencing motivation and well-being. Introduced by Julian Rotter in 1954, it is categorized into internal and external locus of control.Internal Locus of ControlIndividuals with an internal locus of control believe their actions determine outcomes, fostering responsibility, self-efficacy, and motivation. For example, an employee may attribute career success to hard work. Research links this mindset to...
227
01:23Diencephalon: Hypothalamus and Coordination
4.2K
The hypothalamus is a small yet highly complex and essential brain region that plays a crucial role in regulating various bodily functions. Anatomically, it is located at the base of the brain, just above the brainstem and below the thalamus, forming part of the limbic system.
The hypothalamus interacts with other brain regions, including the pituitary gland, through a direct physical connection called the hypothalamic-pituitary axis. The hypothalamus receives somatic and visceral inputs and...
The hypothalamus interacts with other brain regions, including the pituitary gland, through a direct physical connection called the hypothalamic-pituitary axis. The hypothalamus receives somatic and visceral inputs and...
4.2K
01:47Aggression
30.4K
Humans engage in aggression when they seek to cause harm or pain to another person. Aggression takes two forms depending on one’s motives: hostile or instrumental. Hostile aggression is motivated by feelings of anger with intent to cause pain; a fight in a bar with a stranger is an example of hostile aggression. In contrast, instrumental aggression is motivated by achieving a goal and does not necessarily involve intent to cause pain (Berkowitz, 1993); a contract killer who murders for...
30.4K
01:19Root-Locus Method
518
A cruise control system in a car is designed to maintain a specified speed automatically by adjusting the gas pedal. The system continuously measures the vehicle's speed and makes fine adjustments to the pedal to achieve this goal. The root locus method is particularly useful for understanding how the cruise control system's behavior changes under varying conditions, such as when the car goes uphill, downhill, or faces strong wind resistance.
This system can be represented by a block...
This system can be represented by a block...
518
01:15Construction of Root Locus
421
The construction of a root locus involves several key steps to analyze and visualize the behavior of a system's poles with varying gain. The number of branches in the root locus equals the number of closed-loop poles and is symmetrical about the real axis.
For positive gain values, the root locus exists on the real axis to the left of an odd number of finite open-loop poles or zeros. The root locus starts at the open-loop poles and traces the paths of the closed-loop poles as the gain...
For positive gain values, the root locus exists on the real axis to the left of an odd number of finite open-loop poles or zeros. The root locus starts at the open-loop poles and traces the paths of the closed-loop poles as the gain...
421
01:05Properties of the Root Locus
308
The root locus method is an invaluable tool for analyzing higher-order systems without needing to factor the denominator of the transfer function. A pole of the system is identified when the characteristic polynomial in the transfer function's denominator equals zero.
To determine if a point lies on the root locus, the criterion involves the sum of angles contributed by all poles and zeros to that point. Specifically, this sum must be an odd multiple of 180 degrees. The gain at any point on...
To determine if a point lies on the root locus, the criterion involves the sum of angles contributed by all poles and zeros to that point. Specifically, this sum must be an odd multiple of 180 degrees. The gain at any point on...
308