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Impaired hemodynamic activity in the right dorsolateral prefrontal cortex is associated with impairment of placebo analgesia and clinical symptoms in postherpetic neuralgia

The dorsolateral prefrontal cortex (dlPFC) is functionally linked to the descending pain modulation system and has been implicated in top down pain inhibition, including placebo analgesia. Therefore, functions of the dlPFC may be impaired in patients with chronic pain. Postherpetic neuralgia (PHN) i...

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Autores principales: Hibi, Daisuke, Takamoto, Kouichi, Iwama, Yudai, Ebina, Shohei, Nishimaru, Hiroshi, Matsumoto, Jumpei, Takamura, Yusaku, Yamazaki, Mitsuaki, Nishijo, Hisao
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Elsevier 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7033353/
https://www.ncbi.nlm.nih.gov/pubmed/32095656
http://dx.doi.org/10.1016/j.ibror.2020.01.003
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author Hibi, Daisuke
Takamoto, Kouichi
Iwama, Yudai
Ebina, Shohei
Nishimaru, Hiroshi
Matsumoto, Jumpei
Takamura, Yusaku
Yamazaki, Mitsuaki
Nishijo, Hisao
author_facet Hibi, Daisuke
Takamoto, Kouichi
Iwama, Yudai
Ebina, Shohei
Nishimaru, Hiroshi
Matsumoto, Jumpei
Takamura, Yusaku
Yamazaki, Mitsuaki
Nishijo, Hisao
author_sort Hibi, Daisuke
collection PubMed
description The dorsolateral prefrontal cortex (dlPFC) is functionally linked to the descending pain modulation system and has been implicated in top down pain inhibition, including placebo analgesia. Therefore, functions of the dlPFC may be impaired in patients with chronic pain. Postherpetic neuralgia (PHN) is one of several syndromes with chronic neuropathic pain. In the present study, we investigated possible dysfunction of the dlPFC in chronic pain using patients with PHN. In a conditioning phase, heathy controls (n = 15) and patients with PHN (n = 7) were exposed to low (LF) and high (HF) frequency tones associated with noxious stimuli: weak (WS) and strong (SS) electrical stimulation, respectively. After the conditioning, cerebral hemodynamic activity was recorded from the bilateral dlPFC while the subjects were subjected to the cue tone-noxious electrical stimulation paradigm, in which incorrectly cued noxious stimuli were sometimes delivered to induce placebo and nocebo effects. The results indicated that hemodynamic responses to the LF tone in the right dlPFC was significantly lower in patients with PHN compared to the healthy controls. Furthermore, the same hemodynamic responses in the right dlPFC were correlated with placebo effects. In addition, clinical symptoms of PHN were negatively correlated to cerebral hemodynamic responses in the right dlPFC and magnitudes of the placebo effects. The results suggest that the right dlPFC, which is closely associated with the descending pain modulation system, is disturbed in PHN.
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spelling pubmed-70333532020-02-24 Impaired hemodynamic activity in the right dorsolateral prefrontal cortex is associated with impairment of placebo analgesia and clinical symptoms in postherpetic neuralgia Hibi, Daisuke Takamoto, Kouichi Iwama, Yudai Ebina, Shohei Nishimaru, Hiroshi Matsumoto, Jumpei Takamura, Yusaku Yamazaki, Mitsuaki Nishijo, Hisao IBRO Rep Article The dorsolateral prefrontal cortex (dlPFC) is functionally linked to the descending pain modulation system and has been implicated in top down pain inhibition, including placebo analgesia. Therefore, functions of the dlPFC may be impaired in patients with chronic pain. Postherpetic neuralgia (PHN) is one of several syndromes with chronic neuropathic pain. In the present study, we investigated possible dysfunction of the dlPFC in chronic pain using patients with PHN. In a conditioning phase, heathy controls (n = 15) and patients with PHN (n = 7) were exposed to low (LF) and high (HF) frequency tones associated with noxious stimuli: weak (WS) and strong (SS) electrical stimulation, respectively. After the conditioning, cerebral hemodynamic activity was recorded from the bilateral dlPFC while the subjects were subjected to the cue tone-noxious electrical stimulation paradigm, in which incorrectly cued noxious stimuli were sometimes delivered to induce placebo and nocebo effects. The results indicated that hemodynamic responses to the LF tone in the right dlPFC was significantly lower in patients with PHN compared to the healthy controls. Furthermore, the same hemodynamic responses in the right dlPFC were correlated with placebo effects. In addition, clinical symptoms of PHN were negatively correlated to cerebral hemodynamic responses in the right dlPFC and magnitudes of the placebo effects. The results suggest that the right dlPFC, which is closely associated with the descending pain modulation system, is disturbed in PHN. Elsevier 2020-02-07 /pmc/articles/PMC7033353/ /pubmed/32095656 http://dx.doi.org/10.1016/j.ibror.2020.01.003 Text en © 2020 The Author(s) http://creativecommons.org/licenses/by/4.0/ This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Hibi, Daisuke
Takamoto, Kouichi
Iwama, Yudai
Ebina, Shohei
Nishimaru, Hiroshi
Matsumoto, Jumpei
Takamura, Yusaku
Yamazaki, Mitsuaki
Nishijo, Hisao
Impaired hemodynamic activity in the right dorsolateral prefrontal cortex is associated with impairment of placebo analgesia and clinical symptoms in postherpetic neuralgia
title Impaired hemodynamic activity in the right dorsolateral prefrontal cortex is associated with impairment of placebo analgesia and clinical symptoms in postherpetic neuralgia
title_full Impaired hemodynamic activity in the right dorsolateral prefrontal cortex is associated with impairment of placebo analgesia and clinical symptoms in postherpetic neuralgia
title_fullStr Impaired hemodynamic activity in the right dorsolateral prefrontal cortex is associated with impairment of placebo analgesia and clinical symptoms in postherpetic neuralgia
title_full_unstemmed Impaired hemodynamic activity in the right dorsolateral prefrontal cortex is associated with impairment of placebo analgesia and clinical symptoms in postherpetic neuralgia
title_short Impaired hemodynamic activity in the right dorsolateral prefrontal cortex is associated with impairment of placebo analgesia and clinical symptoms in postherpetic neuralgia
title_sort impaired hemodynamic activity in the right dorsolateral prefrontal cortex is associated with impairment of placebo analgesia and clinical symptoms in postherpetic neuralgia
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7033353/
https://www.ncbi.nlm.nih.gov/pubmed/32095656
http://dx.doi.org/10.1016/j.ibror.2020.01.003
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