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Effect of conditioned pain modulation on long-term potentiation-like pain amplification in humans

Effect of conditioned pain modulation on long-term potentiation-like pain amplification in humans 124 Abstracts / Scandinavian Journal of Pain 12 (2016) 117–124 in connection with the first pneumococcal vaccination at three therapy was not related to education, family income or health rela- months of age in child healthcare. ted quality of life. Method: The study included 72 children who, at three months Conclusions: Women and urban residents are more likely of age received their first pneumococcal vaccine (Prevenar 13 ). than men and rural residents to seek Complimentary/Alternative therapy for chronic. People are more likely to seek Complimen- The children were randomized, 36 children received pneumococcal vaccination with placebo cream and the other 36 children received tary/Alternative care for chronic pain the more severe pain is. the intervention, Emla -cream. Result: The result shows that anesthetic cream Emla signifi- http://dx.doi.org/10.1016/j.sjpain.2016.05.022 cantly reduces pain when FLACC is used as a pain assessment tool and the children begin to cry significantly later than children who Effect of conditioned pain modulation on received placebo cream. An interesting secondary finding of the long-term potentiation-like pain amplification study was that the younger the child was the stronger was the in humans reaction to pain. a,∗ a Weiwei Xia , Carsten Dahl Mørch , Dagfinn Conclusion: The infant needs to be treated as an autonomous b a Matre , Ole Kæseler Andersen individual with full integrity. We recommend Emla to be used and applied in vaccination when the children are three-, five- and a ® Center for Neuroplasticity and Pain (CNAP), SMI , twelve months. Department of Health Science and Technology, Aalborg University, Aalborg, Denmark http://dx.doi.org/10.1016/j.sjpain.2016.05.021 National Institute of Occupational Health, Department of Work Psychology and Physiology, Use of Complimentary/Alternative therapy for Oslo, Norway chronic pain E-mail address: wx@hst.aau.dk (W. Xia). a,∗ b Thorbjörg Jonsdottir , Helga Jonsdottir , Aim: The current study aimed to explore the effect of con- b,c Sigridur Gunnarsdottir ditioned pain modulation (CPM) on the long-term potentiation (LTP)-like pain amplification induced by peripheral 10 Hz condi- University of Akureyri, Akureyri, Iceland tioning electrical stimulation (CES). University of Iceland, Reykjavik, Iceland Methods: Sensory changes and neurogenic inflammatory vas- Landspitali, The National University Hospital of cular reactions induced by 10 Hz CES were assessed in twenty Iceland, Iceland subjects in a randomized crossover design involving two experi- E-mail address: thorbj@unak.is (T. Jonsdottir). mental days separated by at least one week. The CPM effect was Aims: To investigate the use of Complimentary/Alternative the- activated by cold pressor test (CPT) (4 C) which was applied imme- rapy for chronic pain in nationwide sample. diately before the 10 Hz CES in the active session and 32 C water Methods: In this cross-sectional study a postal questionnaire was used in the control session. Perceptual intensity ratings to sin- measuring socio-demographic variables (e.g. gender, education, gle electrical stimulation (SES) at the conditioned skin site and income and residence), pain characteristics (severity and inter- to mechanical stimuli (pinprick and light stroking) in the imme- ference with daily life), health related quality of life and use diate vicinity of the electrode for CES were recorded. Superficial of Complimentary/Alternative therapy for chronic pain, was sent blood flow (SBF), skin temperature (ST), and heat pain threshold to a sample of 4500 individuals randomly drawn from the (HPT) were also measured. The pain intensities during the CES pro- national population of Iceland. The relationships between socio- cess were recorded and the short-form McGill Pain Questionnaire demographic and pain related variables and pain related use (SF-MPQ) was used for assessing the pain experience. Complimentary/Alternative therapy among participants reporting Results: CPT reduced the pain perception increments to pin- chronic pain (≥3 months) were tested. prick (12.8 g) and light stroking stimuli after 10 Hz CES compared Results: The prevalence of chronic pain (≥3 months) among res- to the control session. Moreover, CPT resulted in lower pain inten- pondents was 47.5%. Among participants reporting chronic pain, sity ratings during the CES process but without significant changes 45.5% (n = 343) reported having consulted some kind of Com- in the SF-MPQ scores between the two sessions. The SBF and ST plimentary or Alternative therapy for their pain the previous were found to increase after CES and then gradually decline but six months and this was more prevalent among women than without differences between the CPT and the control sessions. No men. Most usual kind of therapists consulted was Acupuncturists CPM effect was found for HPT and pain intensity increments to SES. (21.4%) and Chiropractors (18.3%). There were some gender dif- Conclusions: The cold pressor test inhibited heterotopic ferences in what kind of therapy people had consulted. Women perception amplification to mechanical stimuli after conditio- were more likely than men to have consulted Acupuncturist while ning electrical stimulation. The results indicate that endogenous men consulted a Chiropractor more often than women. Logistic descending inhibitory systems may affect pain-amplificatory regression analysis showed that predictors for use of Compli- mechanisms. mentary/Alternative therapy for chronic pain were gender, urban residence and pain severity. The use of Complimentary/Alternative http://dx.doi.org/10.1016/j.sjpain.2016.05.023 http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Scandinavian Journal of Pain de Gruyter

Effect of conditioned pain modulation on long-term potentiation-like pain amplification in humans

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Publisher
de Gruyter
Copyright
© 2016 Scandinavian Association for the Study of Pain
ISSN
1877-8860
eISSN
1877-8879
DOI
10.1016/j.sjpain.2016.05.023
Publisher site
See Article on Publisher Site

Abstract

124 Abstracts / Scandinavian Journal of Pain 12 (2016) 117–124 in connection with the first pneumococcal vaccination at three therapy was not related to education, family income or health rela- months of age in child healthcare. ted quality of life. Method: The study included 72 children who, at three months Conclusions: Women and urban residents are more likely of age received their first pneumococcal vaccine (Prevenar 13 ). than men and rural residents to seek Complimentary/Alternative therapy for chronic. People are more likely to seek Complimen- The children were randomized, 36 children received pneumococcal vaccination with placebo cream and the other 36 children received tary/Alternative care for chronic pain the more severe pain is. the intervention, Emla -cream. Result: The result shows that anesthetic cream Emla signifi- http://dx.doi.org/10.1016/j.sjpain.2016.05.022 cantly reduces pain when FLACC is used as a pain assessment tool and the children begin to cry significantly later than children who Effect of conditioned pain modulation on received placebo cream. An interesting secondary finding of the long-term potentiation-like pain amplification study was that the younger the child was the stronger was the in humans reaction to pain. a,∗ a Weiwei Xia , Carsten Dahl Mørch , Dagfinn Conclusion: The infant needs to be treated as an autonomous b a Matre , Ole Kæseler Andersen individual with full integrity. We recommend Emla to be used and applied in vaccination when the children are three-, five- and a ® Center for Neuroplasticity and Pain (CNAP), SMI , twelve months. Department of Health Science and Technology, Aalborg University, Aalborg, Denmark http://dx.doi.org/10.1016/j.sjpain.2016.05.021 National Institute of Occupational Health, Department of Work Psychology and Physiology, Use of Complimentary/Alternative therapy for Oslo, Norway chronic pain E-mail address: wx@hst.aau.dk (W. Xia). a,∗ b Thorbjörg Jonsdottir , Helga Jonsdottir , Aim: The current study aimed to explore the effect of con- b,c Sigridur Gunnarsdottir ditioned pain modulation (CPM) on the long-term potentiation (LTP)-like pain amplification induced by peripheral 10 Hz condi- University of Akureyri, Akureyri, Iceland tioning electrical stimulation (CES). University of Iceland, Reykjavik, Iceland Methods: Sensory changes and neurogenic inflammatory vas- Landspitali, The National University Hospital of cular reactions induced by 10 Hz CES were assessed in twenty Iceland, Iceland subjects in a randomized crossover design involving two experi- E-mail address: thorbj@unak.is (T. Jonsdottir). mental days separated by at least one week. The CPM effect was Aims: To investigate the use of Complimentary/Alternative the- activated by cold pressor test (CPT) (4 C) which was applied imme- rapy for chronic pain in nationwide sample. diately before the 10 Hz CES in the active session and 32 C water Methods: In this cross-sectional study a postal questionnaire was used in the control session. Perceptual intensity ratings to sin- measuring socio-demographic variables (e.g. gender, education, gle electrical stimulation (SES) at the conditioned skin site and income and residence), pain characteristics (severity and inter- to mechanical stimuli (pinprick and light stroking) in the imme- ference with daily life), health related quality of life and use diate vicinity of the electrode for CES were recorded. Superficial of Complimentary/Alternative therapy for chronic pain, was sent blood flow (SBF), skin temperature (ST), and heat pain threshold to a sample of 4500 individuals randomly drawn from the (HPT) were also measured. The pain intensities during the CES pro- national population of Iceland. The relationships between socio- cess were recorded and the short-form McGill Pain Questionnaire demographic and pain related variables and pain related use (SF-MPQ) was used for assessing the pain experience. Complimentary/Alternative therapy among participants reporting Results: CPT reduced the pain perception increments to pin- chronic pain (≥3 months) were tested. prick (12.8 g) and light stroking stimuli after 10 Hz CES compared Results: The prevalence of chronic pain (≥3 months) among res- to the control session. Moreover, CPT resulted in lower pain inten- pondents was 47.5%. Among participants reporting chronic pain, sity ratings during the CES process but without significant changes 45.5% (n = 343) reported having consulted some kind of Com- in the SF-MPQ scores between the two sessions. The SBF and ST plimentary or Alternative therapy for their pain the previous were found to increase after CES and then gradually decline but six months and this was more prevalent among women than without differences between the CPT and the control sessions. No men. Most usual kind of therapists consulted was Acupuncturists CPM effect was found for HPT and pain intensity increments to SES. (21.4%) and Chiropractors (18.3%). There were some gender dif- Conclusions: The cold pressor test inhibited heterotopic ferences in what kind of therapy people had consulted. Women perception amplification to mechanical stimuli after conditio- were more likely than men to have consulted Acupuncturist while ning electrical stimulation. The results indicate that endogenous men consulted a Chiropractor more often than women. Logistic descending inhibitory systems may affect pain-amplificatory regression analysis showed that predictors for use of Compli- mechanisms. mentary/Alternative therapy for chronic pain were gender, urban residence and pain severity. The use of Complimentary/Alternative http://dx.doi.org/10.1016/j.sjpain.2016.05.023

Journal

Scandinavian Journal of Painde Gruyter

Published: Jul 1, 2016

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