Stressor controllability and learned helplessness: the roles of the dorsal raphe nucleus, serotonin, and corticotropin-releasing factor.
Abstract
The term 'learned helplessness' refers to a constellation of behavioral changes that follow exposure to stressors that are not controllable by means of behavioral responses, but that fail to occur if the stressor is controllable. This paper discusses the nature of learned helplessness, as well as the role of the dorsal raphe nucleus, serotonin, and corticotropin-releasing hormone in mediating the behavioral effects of uncontrollable stressors. Recent research indicates that (a) uncontrollable stressors sensitize serotonergic neurons in the dorsal raphe, and that a corticotropin-releasing factor-related ligand, acting at the Type II receptor, is essential to this sensitization process, and (b) the consequent exaggerated release of serotonin in response to subsequent input is at least in part responsible for the behavioral changes that occur. Finally, implications for the general role of corticotropin-releasing hormone in stress-related phenomena and for the learned helplessness paradigm as an animal model of either depression or anxiety are discussed.
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Inescapable shock produces a broad suite of behavioral changes that do not occur when shocks are escapable.
“a wide range of other behavioral changes followed INESC including reduced aggression, reduced social dominance, reduced food and water intake, exaggerated attention to external cues, reduced preference for sweet tastes, potentiated fear conditioning, slowed fear extinction, neophobia, anxious behavior on measures such as juvenile social exploration, potentiated opioid reward, exaggerated stereotyp”
From Learned helplessness at fifty: Insights from neuroscience. (2016) · cites this paper as Maier & Watkins, 2005
Learned helplessness depends critically on pre- and infralimbic cortex in rats, and is known to be mediated by serotonin.
“Third, learned helplessness, which can be interpreted in goal-directed terms [17], depends critically on pre- and infralimbic cortex in rats [38], and is known to be mediated by serotonin [39].”
From Bonsai trees in your head: how the pavlovian system sculpts goal-directed choices by pruning decision trees (2012) · cites this paper as [39]
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“…involvesmultiple CRF receptor subtypes expressed by both 5-HT and GABAergic neurons (Day et al., 2004; Hammack et al., 2003a; Kirby et al., 2008; Maier and Watkins, 2005)the caudal DRN is the DRN subregion in which putative serotonergic neurons are excited by CRF application (Kirby et al.,…”
BackgroundEnvironmental programming of susceptibility and resilience to stress in adulthood in male mice
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“This effect is thought to be dependent on desensitization of inhibitory 5-HT1A autoreceptors that normally inhibit serotonergic neuronal firing within the anxietyand fear-related dorsomedial part of the dorsal raphe nucleus (Maier and Watkins, 2005; Rozeske et al., 2011).”
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- Authors
- Maier, S. F., & Watkins, L. R.
- Affiliations
- University of Colorado Boulder (US)
- Corresponding author
- Maier, Steven F.
- Venue
- Neuroscience & Biobehavioral Reviews
- Publisher
- Elsevier BV
- Published
- 2005-01
- Volume
- 29
- Issue
- 4-5
- Pages
- 829-841
- ISSN
- 0149-7634 (ISSN-L)
- OpenAlex
- W2116777802
- Semantic Scholar
- a0eb0424476a0d533d4e5c27e3d5e517c6e61a09
- Cited by
- 737
- References
- 105
- Citations by year
- 2026: 14 · 2025: 22 · 2024: 23 · 2023: 29 · 2022: 33 · 2021: 38 · 2020: 29 · 2019: 37 · 2018: 30 · 2017: 32 · 2016: 35 · 2015: 46 · 2014: 41 · 2013: 56 · 2012: 47
- FWCI
- 1.96
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Neuroscience & Biobehavioral Reviews (publishedVersion)
- PubMed (publishedVersion)
- Funders
- National Institute of Mental Health (MH 50479)
- Topics
- Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuropeptides and Animal Physiology
- Keywords
- learned helplessness, stressor controllability, dorsal raphe nucleus, serotonin, corticotropin-releasing factor, uncontrollable stress, depression, anxiety, animal models of depression
- MeSH terms
- Animals, Anxiety, Behavior, Animal, Corticotropin-Releasing Hormone, Helplessness, Learned, Humans, Raphe Nuclei, Serotonin, Stress, Physiological
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