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Hypothalamic Circuits for Predation and Evasion.

Yi Li1, Jiawei Zeng2, Juen Zhang1

  • 1National Institute of Biological Sciences, Beijing 102206, China.

Neuron
|February 6, 2018
PubMed
Summary
This summary is machine-generated.

Predation and evasion behaviors are controlled by distinct neural pathways from the lateral hypothalamus (LH) to the midbrain periaqueductal gray (PAG). Inhibitory LH GABA neurons drive predation, while excitatory LH glutamate neurons drive evasion.

Keywords:
GABAchemogeneticsescape behaviorfiber photometryglutamatehunting behaviorlateral hypothalamusoptogeneticsperiaqueductal gray

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Area of Science:

  • Neuroscience
  • Behavioral Biology
  • Animal Behavior

Background:

  • Predator-prey interactions are critical survival events.
  • The hypothalamus plays a role in predation and evasion, but specific neural circuits are unclear.

Purpose of the Study:

  • To define the neural circuits in the lateral hypothalamus (LH) that control predation and evasion behaviors.
  • To investigate the roles of inhibitory and excitatory projections from the LH to the periaqueductal gray (PAG).

Main Methods:

  • Used optogenetics to manipulate neuronal activity in mice.
  • Recorded neural activity in the LH during predation and evasion.
  • Investigated projections from the LH to the PAG.

Main Results:

  • Inhibitory GABA neurons in the LH projecting to the PAG were activated during predation.
  • Optogenetic stimulation of these GABA neurons induced predatory attacks, while inhibition blocked predation.
  • Excitatory glutamate neurons in the LH projecting to the PAG were activated during evasion.
  • Optogenetic stimulation of these glutamate neurons induced evasion, while inhibition impaired it.

Conclusions:

  • Two distinct neural systems within the LH-PAG projection control predation and evasion.
  • These behaviors are regulated by dissociable modular command systems.