ArticleExperimental brain research2018
Inhibitory effects of fluoxetine, an antidepressant drug, on masseter muscle nociception at the trigeminal subnucleus caudalis and upper cervical spinal cord regions in a rat model of psychophysical stress.
Article in Experimental brain research, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers.
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Who cites it
8 citing papers in PubMed, 12 citations in OpenAlex.
- Contribution of proprioceptors in the mesencephalic trigeminal nucleus and their surrounding astrocytes to acidic saline-induced chronic jaw muscle pain in rodents.Frontiers in cellular neuroscience · 2026Article
- Applicability of the theory of pain-sensorimotor interactions to orofacial pain and sensorimotor behavior, and implications for orofacial pain research and management.Journal of oral & facial pain and headache · 2025Review
- Article
- The Fibromyalgia Pain Experience: A Scoping Review of the Preclinical Evidence for Replication and Treatment of the Affective and Cognitive Pain Dimensions.Biomedicines · 2024Article
- Preventive Roles of Rice-Nutrients · 2023Article
- Preclinical models of deep craniofacial nociception and temporomandibular disorder pain.The Japanese dental science review · 2021Review
- Neural Pathways of Craniofacial Muscle Pain: Implications for Novel Treatments.Journal of dental research · 2020Review
- Pain-sensorimotor interactions: New perspectives and a new model.Neurobiology of pain (Cambridge, Mass.)Review
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Authors and funding
8 authors at 2 institutions in 1 country.
Funding
Abstract
This study aimed to determine whether psychophysical stress conditionings had facilitatory effects on masseter muscle nociception in the central nervous system via serotonergic mechanisms in rats. Two experiments were conducted to assess: (1) whether repeated forced swim stress for 3 days increased the number of Fos-positive neurons evoked by masseter muscle injury due to formalin injection; and (2) whether serotonin-reuptake inhibitor, fluoxetine, administered daily after each stress conditioning, had modulatory roles on Fos expression. The number of Fos-positive cells was quantified in several areas within the trigeminal subnucleus caudalis (Vc) and upper cervical spinal cord regions (Vc areas), including the ventrolateral area of the trigeminal subnucleus interpolaris/Vc transition, and the middle or caudal portion of the Vc regions, since nociceptive neural activity in the Vc region could play critical roles in deep craniofacial nociception. We found that forced swim stress conditionings increased depression-like behaviors, which was prevented by fluoxetine. Repeated forced swim stress significantly increased Fos expression in all Vc areas compared with those of non-stressed rats, while systemic administration of fluoxetine significantly decreased Fos expression in all areas, but mainly in the caudal Vc region, in stressed rats. Fluoxetine had no effect on Fos expression in non-stressed rats. These results indicate that repeated forced swim stress conditionings increase Fos expression in the Vc areas, and the contribution of serotonergic mechanisms to masseter muscle nociception could be greater in stressed rats than in sham rats. These results support the hypothesis that changes in brain function, including serotonergic mechanisms, in the Vc areas play critical roles in enhanced masseter muscle nociceptive responses under psychophysical stress conditions.
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