Background: An increasing number of studies are focusing on secondary hyperalgesia to better understand central sensitization, as this phenomenon may play an important role in persistent pain. Recent studies have shown that, compared to the classical high-frequency stimulation protocol (HFS) at 100 Hz, a protocol using 42 Hz stimulation induces a more intense and a larger area of secondary hyperalgesia (SH).
Objectives: The aim of this study was to investigate the within- and between-session reliability of SH induced by this optimized HFS protocol.
Methods: Thirty-two healthy subjects received HFS to their volar forearm in two sessions, separated by at least 2 weeks. SH was assessed by measuring the area size of increased sensitivity to pinprick stimuli after applying HFS, the sensitivity to pinprick stimuli after applying HFS and the change in pinprick sensitivity after versus before HFS. Assessments were made before HFS, and 30, 35 and 40 min after HFS. Relative and absolute reliability were analysed using intraclass correlation coefficients (ICCs), coefficients of variation (CVs), standard error of means (SEMs) and the minimum detectable changes (MDCs).
Results: The area of SH showed good to excellent within-session and between-session relative reliability (ICCs > 0.80), except for the change in pinprick sensitivity, which showed close to poor between-session relative reliability (ICC = 0.53). Furthermore, measures of absolute reliability generally demonstrated large between-subject variability and significant fluctuations across repeated measurements.
Conclusions: HFS-induced hyperalgesia is suitable to discriminate or compare individuals but it may not be sensitive to changes due to an intervention.
Significance: It is crucial to evaluate central sensitization adequately in humans. This study formally establishes the reliability of secondary hyperalgesia induced by electrical high-frequency stimulation. The results of this study will improve future studies investigating secondary hyperalgesia in humans.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1002/ejp.1613 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Lidocaine Enhanced Antitumor Efficacy and Relieved Chemotherapy-Induced Hyperalgesia in Mice with Metastatic Gastric Cancer.
Int J Mol Sci
January 2025
Department of Anaesthesiology, West China Hospital, Sichuan University, Chengdu 610041, China.
With the widespread use of lidocaine for pain control in cancer therapy, its antitumor activity has attracted considerable attention in recent years. This paper provides a simple strategy of combining lidocaine with chemotherapy drugs for cancer therapy, aiming to relieve chemotherapy-induced pain and achieve stronger antitumor efficacy. However, there is still a lack of substantial pre-clinical evidence for the efficacy and related mechanisms of such combinations, obstructing their potential clinical application.
View Article and Find Full Text PDFMarine-derived bioactive compounds for neuropathic pain: pharmacology and therapeutic potential.
Naunyn Schmiedebergs Arch Pharmacol
January 2025
Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research (NIPER), S.A.S. Nagar, Punjab, India.
Neuropathic pain, a challenging condition often associated with diabetes, trauma, or chemotherapy, impairs patients' quality of life. Current treatments often provide inconsistent relief and notable adverse effects, highlighting the urgent need for safer and more effective alternatives. This review investigates marine-derived bioactive compounds as potential novel therapies for neuropathic pain management.
View Article and Find Full Text PDFInflammatory reactivity is unrelated to childhood adversity or provoked modulation of nociception.
medRxiv
December 2024
African Pain Research Initiative, Department of Anaesthesia and Perioperative Medicine, University of Cape Town, Cape Town, South Africa.
Adversity in childhood is robustly associated with persistent pain in adulthood. Neuro-immune interactions are a candidate mechanistic link between childhood adversity and persistent pain, given that both childhood adversity and persistent pain are associated with neural and immune upregulation in adulthood. As such, we aimed to clarify whether immune reactivity is associated with provoked differences in nociceptive processing in humans.
View Article and Find Full Text PDFCapsaicin-induced secondary hyperalgesia differences between the trigeminal and spinal innervation.
Sci Rep
January 2025
Department of Biosciences, Universidade Estadual de Campinas (UNICAMP), Faculdade de Odontologia de Piracicaba (FOP), Piracicaba, Brazil.
This study compared the degree of secondary hyperalgesia and somatosensory threshold changes induced by topical capsaicin between spinal and trigeminal innervation. This crossover clinical trial included 40 healthy individuals in which 0.25 g of 1% capsaicin cream was randomly applied for 45 minutes to a circular area of 2 cm to the skin covering the masseter muscle and forearm in 2 different sessions, separated by at least 24 hours and no more than 72 hours (washout period).
View Article and Find Full Text PDFHow Does Conditioned Pain Modulation Influence Motor Imagery Processes in Women with Fibromyalgia Syndrome? A Cross-Sectional Study Secondary Analysis.
J Clin Med
December 2024
Musculoskeletal Pain and Motor Control Research Group, Faculty of Sport Sciences, Universidad Europea de Madrid, 28670 Villaviciosa de Odón, Spain.
: Fibromyalgia syndrome (FMS) is a multifactorial pain syndrome not only characterized by widespread pain as the primary symptom but also accompanied by physical, psychological, and cognitive manifestations. Impairments in conditioned pain modulation (CPM) are common in this population; however, there is significant heterogeneity in the CPM response among women with FMS. The Left/Right Judgment Task (LRJT) is a validated method for studying motor imagery in chronic pain patients.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!