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Vagus nerve stimulation as a tool for enhancing extinction in exposure-based therapies

Noble, Lindsey J. ; Souza, Rimenez R. ; McIntyre, Christa K.

Psychopharmacology, 2019-01, Vol.236 (1), p.355-367 [Periódico revisado por pares]

Berlin/Heidelberg: Springer Berlin Heidelberg

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Título:
Vagus nerve stimulation as a tool for enhancing extinction in exposure-based therapies
Autor: Noble, Lindsey J. ; Souza, Rimenez R. ; McIntyre, Christa K.
Assuntos: Adrenergic agonists ; Animals ; Anxiety ; Arousal ; Arousal - physiology ; Biodiversity conservation ; Biological markers ; Biomedical and Life Sciences ; Biomedicine ; Brain ; Brain - physiopathology ; Combined Modality Therapy ; Conditioning ; Conditioning, Classical - physiology ; Consolidation ; Emotions ; Epinephrine ; Epinephrine - blood ; Exposure ; Extinction (Psychology) ; Extinction behavior ; Extinction, Psychological - physiology ; Fear & phobias ; Fear - physiology ; Fear conditioning ; Future predictions ; Humans ; Implosive Therapy - methods ; Memory ; Memory - physiology ; Neurological research ; Neurosciences ; Optimization ; Parasympathetic nervous system ; Parasympathetic Nervous System - physiopathology ; Pharmacology/Toxicology ; Post traumatic stress disorder ; Psychiatry ; Rats ; Receptors, N-Methyl-D-Aspartate - physiology ; Reinstatement ; Review ; Stimulation ; Stress (physiology) ; Stress Disorders, Post-Traumatic - physiopathology ; Stress Disorders, Post-Traumatic - therapy ; Sympathetic Nervous System - physiopathology ; Trauma ; Vagus nerve ; Vagus nerve stimulation ; Vagus Nerve Stimulation - methods
É parte de: Psychopharmacology, 2019-01, Vol.236 (1), p.355-367
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
ObjectType-Review-3
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Descrição: Rationale Emotionally traumatic experiences can lead to maladaptive memories that are enduring and intrusive. The goal of exposure-based therapies is to extinguish conditioned fears through repeated, unreinforced exposures to reminders of traumatic events. The extinction of conditioned fear depends upon the consolidation of new memories made during exposure to reminders. An impairment in extinction recall, observed in certain patient populations, can interfere with progress in exposure-based therapies, and the drive to avoid thoughts and reminders of the trauma can undermine compliance and increase dropout rate. Effective adjuncts to exposure-based therapies should improve the consolidation and maintenance of the extinction memory or improve the tolerability of the therapy. Under stressful conditions, the vagus nerve responds to elevations in epinephrine and signals the brain to facilitate the storage of new memories while, as part of the parasympathetic nervous system, it slows the sympathetic response. Objective Here, we review studies relevant to fear extinction, describing the anatomical and functional characteristics of the vagus nerve and mechanisms of vagus nerve stimulation (VNS)-induced memory enhancement and plasticity. Results We propose that stimulation of the left cervical vagus nerve during exposure to conditioned cues signals the brain to store new memories just as epinephrine or emotional arousal would do, but bypasses the peripheral sympathetic “fight-or-flight” response. Conclusions In support of this hypothesis, we have found that VNS accelerates extinction and prevents reinstatement of conditioned fear in rats. Finally, we propose future studies targeting the optimization of stimulation parameters and the search for biomarkers of VNS effectiveness that may improve exposure therapy outcomes.
Editor: Berlin/Heidelberg: Springer Berlin Heidelberg
Idioma: Inglês

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Vagus nerve stimulation as a tool for enhancing extinction in exposure-based therapies

Noble, Lindsey J. ; Souza, Rimenez R. ; McIntyre, Christa K.

Berlin/Heidelberg: Springer Berlin Heidelberg

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