Cited by 92Neurotransmitter Receptor Influence on BehaviorParkinson's Disease Mechanisms and TreatmentsNeuroscience and Neuropharmacology Research

Neural degeneration following chronic stimulant abuse reveals a weak link in brain, fasciculus retroflexus, implying the loss of forebrain control circuitry

Ellison, G·2002·European Neuropsychopharmacology

Abstract

There is increasing evidence that the fasciculus retroflexus (FR) represents a 'weak link' following the continuous administration of drugs of abuse. A variety of drugs which predominantly potentiate dopamine, including D-amphetamine, methamphetamine, MDMA, cocaine, and cathinone, all induce degeneration in axons from lateral habenula, through the sheath of FR, to midbrain cells such as SN, VTA, and raphe. For some drugs, such as cocaine, this is virtually the only degeneration induced in brain. Continuous nicotine also selectively induces degeneration in FR, but in the other half of the tract, i.e. in axons from medial habenula through the core of the tract to interpeduncular nucleus. This phylogenetically primitive tract carries much of the negative feedback from forebrain back onto midbrain reward cells, and the finding that these descending control pathways are compromised following simulated drug binges has implications for theories of drug addiction but also psychosis in general.

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Crossref · 10.1016/s0924-977x(02)00020-2

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  • Nicotine causes degeneration of neurons in the fasciculus retroflexus connecting the MHb to the IPN.

    “In particular, nicotine causes degeneration of neurons in the portion of the fasciculus retroflexus that connects the MHb to the IPN [77, 78].”

    From Mechanistic insights into nicotine withdrawal (2011) · cites this paper as [78]

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Authors
Ellison, G.
Affiliations
University of California, Los Angeles (US)
Corresponding author
Ellison, G
Venue
European Neuropsychopharmacology
Publisher
Elsevier BV
Published
2002-08
Volume
12
Issue
4
Pages
287-297
ISSN
0924-977X (ISSN-L)
OpenAlex
W2145913348
Cited by
92
References
60
Citations by year
2026: 1 · 2025: 1 · 2024: 5 · 2023: 1 · 2022: 2 · 2021: 6 · 2020: 2 · 2019: 7 · 2018: 4 · 2017: 3 · 2016: 2 · 2015: 4 · 2014: 8 · 2013: 6 · 2012: 4
FWCI
1.16
Type
journal article
Language
en
Open access
closed
Locations
  • European Neuropsychopharmacology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Health Sciences › Medicine › Neurology › Parkinson's Disease Mechanisms and Treatments
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
Keywords
fasciculus retroflexus, lateral habenula, medial habenula, interpeduncular nucleus, axonal degeneration, cocaine, amphetamine, MDMA, cathinone, nicotine, substantia nigra, ventral tegmental area, raphe nuclei, drug addiction, psychosis
MeSH terms
Amphetamine, Central Nervous System Stimulants, Animals, Haplorhini, Brain, Cocaine, Humans, Medial Forebrain Bundle, Nerve Degeneration, Neuroanatomy, Nicotine, Prosencephalon, Habenula, Perforant Pathway, Rats

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