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Related Concept Videos

Aggression01:47

Aggression

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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...
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Regulation of Food Intake01:30

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Short-term regulation of food intake primarily involves neural signals from the gastrointestinal (GI) tract, blood nutrient levels, and GI tract hormones. Communication between the gut and brain via vagal nerve fibers plays a significant role in evaluating the contents of the gut. Clinical studies have shown that protein ingestion produces a more prolonged response in these nerve fibers compared to an equivalent amount of glucose. Additionally, the activation of stretch receptors caused by GI...
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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.
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Secondary Motives: Affiliation Motivation and Aggression Motivation01:21

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Affiliation motivation is the intrinsic desire to connect with others and belong to a social group, which plays a crucial role in forming and maintaining personal relationships. This type of motivation is essential for psychological well-being, as it provides individuals with a sense of community and support. An example of this is a student who joins a study group in order to feel a sense of connection. People with high affiliation motivation actively seek social approval, take satisfaction in...
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Hypothalamic-Pituitary Axis01:37

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The response to stress—be it physical or psychological, acute or chronic—involves activation of the Hypothalamic-Pituitary-Adrenal (HPA) axis. The HPA axis is part of the neuroendocrine system because it involves both neuronal and hormonal communication. Its function is to regulate homeostatic systems—metabolic, cardiovascular, and immune—providing the necessary means to respond to a stressor.
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Sympathetic Pathways: Collateral Ganglia and Adrenal Medulla01:27

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The sympathetic pathways of the collateral ganglia and adrenal medulla serve unique but interconnected roles in the sympathetic response.
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A hypothalamic pathway that suppresses aggression toward superior opponents.

Dongyu Wei1, Takuya Osakada1, Zhichao Guo1

  • 1Neuroscience Institute, New York University Langone Medical Center, New York, NY, USA.

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|April 10, 2023
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Summary

Scientists found a brain pathway that regulates aggression in male mice. This pathway helps mice assess an opponent's fighting ability and avoid dangerous fights.

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Area of Science:

  • Neuroscience
  • Behavioral Biology
  • Endocrinology

Background:

  • Aggression requires precise regulation due to its high costs.
  • The medial preoptic area (MPOA) plays a role in social behaviors, including aggression.

Purpose of the Study:

  • To identify the neural pathways involved in modulating aggression in male mice.
  • To investigate the role of estrogen receptor alpha-expressing cells in the caudal MPOA (cMPOAEsr1) and their projection to the ventrolateral VMH (VMHvl).

Main Methods:

  • Utilized calcium imaging to monitor cMPOAEsr1 cell activity during male-male interactions.
  • Employed chemogenetics to inactivate or activate the cMPOAEsr1-VMHvl pathway.
  • Observed behavioral responses of male mice during social confrontations.

Main Results:

  • cMPOAEsr1 cells showed increased activity during male-male interactions, distinct from rostral MPOAEsr1 cells.
  • The activity of cMPOAEsr1 cells correlated with the perceived fighting capability of opponents.
  • Inactivating the cMPOAEsr1-VMHvl pathway increased aggression, while activation suppressed it.

Conclusions:

  • The cMPOAEsr1-VMHvl pathway is crucial for regulating aggression in male mice.
  • This pathway encodes information about opponent fighting ability, potentially preventing disadvantageous conflicts.