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Collateral Pathways from the Ventromedial Hypothalamus Mediate Defensive Behaviors

Open access
Wang, Li, Chen, Irene Z., Lin, Dayu·2015·Neuron

Abstract

Summary The ventromedial hypothalamus (VMH) was thought to be essential for coping with threat, although its circuit mechanism remains unclear. To investigate this, we optogenetically activated steroidogenic factor 1 (SF1)-expressing neurons in the dorsomedial and central part of VMH (VMHdm/c), and observed a range of context dependent somatomotor and autonomic responses resembling animals' natural defensive behaviors. By activating independent pathways emanating from VMHdm/c, we demonstrated that VMHdm/c projection to the dorsolateral periaqueductal gray (dlPAG) induces inflexible immobility, while the VMHdm/c to anterior hypothalamic nucleus (AHN) pathway promotes avoidance. Furthermore, consistent with the behavior changes induced by VMH to AHN pathway activation, direct activation of the AHN elicited avoidance and escape jumping but not immobility. Finally, retrograde tracing studies revealed that nearly 50% of PAG- projecting VMHdm/c neurons send collateral projection to the AHN and vice versa. Thus, VMHdm/c neurons employ a one-to-many wiring configuration to orchestrate multiple aspects of defensive behaviors.

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Metadata

Authors
Wang, L., Chen, I. Z., & Lin, D.
Venue
Neuron
Publisher
Elsevier BV
Published
2015-03
Volume
85
Issue
6
Pages
1344-1358
ISSN
0896-6273 (ISSN-L)
OpenAlex
W2042656725
Cited by
322
References
5
FWCI
11.06
Type
journal article
Language
en
Open access
bronze

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CoChat. (2026). Citation check: Collateral Pathways from the Ventromedial Hypothalamus Mediate Defensive Behaviors. https://app.cochat.ai/papers/10.1016/j.neuron.2014.12.025
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Wang, L., Chen, I. Z., & Lin, D. (2015). Collateral Pathways from the Ventromedial Hypothalamus Mediate Defensive Behaviors. Neuron. https://doi.org/10.1016/j.neuron.2014.12.025

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