Cited by 503Neurotransmitter Receptor Influence on BehaviorNeuroscience and Neuropharmacology ResearchDeep Brain Stimulation and Movement Disorders

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The mesopontine rostromedial tegmental nucleus: A structure targeted by the lateral habenula that projects to the ventral tegmental area of Tsai and substantia nigra compacta

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Abstract

Prior studies revealed that aversive stimuli and psychostimulant drugs elicit Fos expression in neurons clustered above and behind the interpeduncular nucleus that project strongly to the ventral tegmental area (VTA) and substantia nigra (SN) compacta (C). Other reports suggest that these neurons modulate responses to aversive stimuli. We now designate the region containing them as the "mesopontine rostromedial tegmental nucleus" (RMTg) and report herein on its neuroanatomy. Dense micro-opioid receptor and somatostatin immunoreactivity characterize the RMTg, as do neurons projecting to the VTA/SNC that are enriched in GAD67 mRNA. Strong inputs to the RMTg arise in the lateral habenula (LHb) and, to a lesser extent, the SN. Other inputs come from the frontal cortex, ventral striatopallidum, extended amygdala, septum, preoptic region, lateral, paraventricular and posterior hypothalamus, zona incerta, periaqueductal gray, intermediate layers of the contralateral superior colliculus, dorsal raphe, mesencephalic, pontine and medullary reticular formation, and the following nuclei: parafascicular, supramammillary, mammillary, ventral lateral geniculate, deep mesencephalic, red, pedunculopontine and laterodorsal tegmental, cuneiform, parabrachial, and deep cerebellar. The RMTg has meager outputs to the forebrain, mainly to the ventral pallidum, preoptic-lateral hypothalamic continuum, and midline-intralaminar thalamus, but much heavier outputs to the brainstem, including, most prominently, the VTA/SNC, as noted above, and to medial tegmentum, pedunculopontine and laterodorsal tegmental nuclei, dorsal raphe, and locus ceruleus and subceruleus. The RMTg may integrate multiple forebrain and brainstem inputs in relation to a dominant LHb input. Its outputs to neuromodulatory projection systems likely converge with direct LHb projections to those structures.

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  1. Heimer L, 2008, Anatomy of neuropsychiatry: the new anatomy of the basal forebrain and its implications for neuropsychiatric disease
  2. Jakab RL, 1995, The rat nervous system, 405

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Metadata

Authors
Jhou, T. C., Geisler, S., Marinelli, M., Degarmo, B. A., & Zahm, D. S.
Affiliations
  • National Institutes of Health (US)
  • Saint Louis University (US)
  • Rosalind Franklin University of Medicine and Science (US)
Corresponding author
  • Jhou, Thomas C.
  • Zahm, Daniel S.
Venue
Journal of Comparative Neurology
Publisher
Wiley
Published
2009-02-20
Volume
513
Issue
6
Pages
566-596
ISSN
  • 0021-9967 (ISSN-L)
  • 1096-9861
OpenAlex
W2085520758
Cited by
503
References
102
Citations by year
2026: 16 · 2025: 15 · 2024: 35 · 2023: 13 · 2022: 17 · 2021: 39 · 2020: 48 · 2019: 39 · 2018: 34 · 2017: 27 · 2016: 34 · 2015: 26 · 2014: 38 · 2013: 36 · 2012: 28
FWCI
11.61
Type
journal article
Language
en
Open access
Locations
  • The Journal of Comparative Neurology (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Heart, Lung, and Blood Institute (HL 60292, P50HL060292)
  • National Institute of Mental Health (MH-12370, F31MH012370)
  • National Institute on Drug Abuse (DA020654, R01DA020654)
  • National Institute of Neurological Disorders and Stroke (NS23805, R01NS023805)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Health Sciences › Medicine › Clinical Neurology › Deep Brain Stimulation and Movement Disorders
Keywords
rostromedial tegmental nucleus, lateral habenula, ventral tegmental area, substantia nigra pars compacta, mesopontine tegmentum, interpeduncular nucleus, Fos expression, aversive stimuli, psychostimulants, mu-opioid receptor, somatostatin, GAD67, neuroanatomy, brainstem projections, neuromodulation, pedunculopontine nucleus, laterodorsal tegmentum, dorsal raphe nucleus, locus coeruleus
MeSH terms
Animals, Cocaine, Glutamate Decarboxylase, Male, Methamphetamine, Neural Pathways, RNA, Messenger, Self Administration, Somatostatin, Substantia Nigra, Sulfur Radioisotopes, Tegmentum Mesencephali, Gene Expression, Proto-Oncogene Proteins c-fos, Rats, Sprague-Dawley, Receptors, Opioid, mu, Ventral Tegmental Area, Habenula, Rats

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