Cited by 353Regulation of Appetite and ObesityNeurotransmitter Receptor Influence on BehaviorNeuroscience and Neuropharmacology Research

A proposed hypothalamic–thalamic–striatal axis for the integration of energy balance, arousal, and food reward

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Kelley, Ann E., Baldo, Brian A., Pratt, Wayne E.·2005·Journal of Comparative Neurology

Abstract

We elaborate herein a novel theory of basal ganglia function that accounts for why palatable, energy‐dense foods retain high incentive value even when immediate physiological energy requirements have been met. Basal ganglia function has been studied from the perspective of topographical segregation of processing within parallel circuits, with primary focus on motor control and cognition. Recent findings suggest, however, that the striatum can act as an integrated unit to modulate motivational state. We describe evidence that the striatal enkephalin system, which regulates the hedonic impact of preferred foods, undergoes coordinated gene expression changes that track current motivational state with regard to food intake. Striatal enkephalin gene expression is also downregulated by an intrastriatal infusion of a cholinergic muscarinic antagonist, a manipulation that greatly suppresses food intake. To account for these findings, we propose that signaling through a hypothalamic–midline thalamic–striatal axis impinges on the cholinergic interneurons of the striatum, which via their large, overlapping axonal fields act as a network to modulate enkephalin‐containing striatal output neurons. A key relay in this circuit is the paraventricular thalamic nucleus, which receives convergent input from orexin‐coded hypothalamic energy‐sensing and behavioral state‐regulating neurons, as well as from circadian oscillators, and projects to cholinergic interneurons throughout the striatal complex. We hypothesize that this system evolved to coordinate feeding and arousal, and to prolong the feeding central motivational state beyond the fulfillment of acute energy needs, thereby promoting “overeating” and the consequent development of an energy reserve for potential future food shortages. J. Comp. Neurol. 493:72–85, 2005. © 2005 Wiley‐Liss, Inc.

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  • Orexin neurons project widely within both forebrain and hindbrain, including a hypothalamic-thalamic-striatal loop and projections to oromotor and autonomic motor areas in the caudal brainstem.

    “In addition to midbrain dopamine neurons, orexin neurons project widely within both forebrain and hindbrain. In particular, a hypothalamic-thalamic-striatal loop involving orexin projections to the paraventricular nucleus of the thalamus and cholinergic striatal interneurons ([93](#B93)), and orexin projections to oromotor and autonomic motor areas in the caudal brainstem ([6](#B6)).”

    From Food reward, hyperphagia, and obesity (2011) · cites this paper as [93]

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Authors
Kelley, A. E., Baldo, B. A., & Pratt, W. E.
Affiliations
University of Wisconsin–Madison (US)
Corresponding author
Kelley, Ann E.
Venue
Journal of Comparative Neurology
Publisher
Wiley
Published
2005-10-27
Volume
493
Issue
1
Pages
72-85
ISSN
  • 0021-9967 (ISSN-L)
  • 1096-9861
OpenAlex
W2153161303
Cited by
352
References
128
Citations by year
2026: 7 · 2025: 14 · 2024: 11 · 2023: 11 · 2022: 14 · 2021: 14 · 2020: 20 · 2019: 14 · 2018: 11 · 2017: 19 · 2016: 21 · 2015: 24 · 2014: 17 · 2013: 19 · 2012: 23
FWCI
5.99
Type
journal article
Language
en
Open access
Locations
  • The Journal of Comparative Neurology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (1f32mh068981-01a2)
  • National Institute of Mental Health (MH068981)
  • National Institute on Drug Abuse (DA-04788)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
basal ganglia function, food reward, energy balance, arousal, food intake regulation, paraventricular thalamus, cholinergic interneurons, orexin, motivational states, ovariectomized rats, overeating, circadian clock
MeSH terms
Acetylcholine, Animals, Arousal, Dopamine, Dynorphins, Energy Metabolism, Enkephalins, Food, Hypothalamus, Models, Biological, Narcotics, Nucleus Accumbens, Protein Precursors, Reward, RNA, Messenger, Thalamus, Receptors, Opioid, kappa, Rats

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