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Collateralization of projections from the paraventricular nucleus of the thalamus to the nucleus accumbens, bed nucleus of the stria terminalis, and central nucleus of the amygdala

Dong, Xinwen, Li, Sa, Kirouac, Gilbert J.·2017·Brain Structure and Function

Abstract

The paraventricular nucleus of the thalamus (PVT) is a midline thalamic nucleus with dense projections to the nucleus accumbens (NAc), dorsolateral region of the bed nucleus of the stria terminalis (BSTDL) and the lateral/capsular region of the central nucleus of the amygdala (CeL/CeC). Recent experimental evidence indicates that the PVT is involved in both appetitive and aversive behaviors. However, it is unknown if subgroups of neurons in the PVT innervate different subcortical targets or if the same neurons issue collaterals to multiple areas. To address this issue, we injected two different fluorescent retrograde tracers, cholera toxin subunit B conjugated to Alexa Fluor-488 or Alexa Fluor-594, into different pairs of the subcortical targets including different parts of the NAc (shell, core, dorsomedial shell, and ventromedial shell), BSTDL, and amygdala (basolateral amygdala and CeL/CeC). The results indicate a moderate to high level of collateralization of projections from neurons in the PVT to NAc, BSTDL, and CeL/CeC suggesting a potential importance of the PVT in simultaneously coordinating the activity of key regions of the brain involved in mediating emotional and motivational behaviors. We also observed a difference in the subcortical targets innervated by the anterior PVT (aPVT) and posterior PVT (pPVT) showing that more neurons in the aPVT innervate the dorsomedial part of the NAc shell, while more neurons in the pPVT innervate the ventromedial NAc shell, BSTDL, and CeL/CeC. This observation is suggestive of a potential functional difference between the aPVT and pPVT.

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Crossref · 10.1007/s00429-017-1445-8

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  • The PVT projects to various reward-associated areas including the NAc, bed nucleus of the stria terminalis, and central amygdala through collateralized projections.

    “Given that the PVT projects to various reward-associated areas including the NAc, bed nucleus of the stria terminalis, and central amygdala through collateralized projections 10,14, mPFC->pPVT neurons are well-positioned to provide top-down control of brain networks.”

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Authors
Dong, X., Li, S., & Kirouac, G. J.
Affiliations
University of Manitoba (CA)
Corresponding author
Kirouac, Gilbert J.
Venue
Brain Structure and Function
Published
2017-05-20
Volume
222
Issue
9
Pages
3927-3943
ISSN
  • 1863-2653 (ISSN-L)
  • 1863-2661
OpenAlex
W2616069238
Cited by
143
References
61
Citations by year
2026: 12 · 2025: 13 · 2024: 17 · 2023: 14 · 2022: 21 · 2021: 26 · 2020: 19 · 2019: 8 · 2018: 10 · 2017: 3
FWCI
6.28
Type
journal article
Language
en
Open access
closed
Locations
  • Brain Structure and Function (publishedVersion)
  • PubMed (publishedVersion)
Funders
Institute of Neurosciences, Mental Health and Addiction (MOP89758)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
Keywords
paraventricular thalamus, collateral projections, nucleus accumbens, bed nucleus of the stria terminalis, central amygdala, subcortical projections, cholera toxin B subunit, retrograde tracing
MeSH terms
Animals, Brain Mapping, Cholera Toxin, Functional Laterality, Male, Neural Pathways, Nucleus Accumbens, Phosphopyruvate Hydratase, Septal Nuclei, Rats, Sprague-Dawley, Midline Thalamic Nuclei, Rats

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