Offset Analgesia: Affected by Morphine?
Author
Nilsson, Matias
Term
4. term
Publication year
2012
Pages
80
Abstract
Offset analgesia is a robust endogenous pain-inhibitory phenomenon in which a slight decrease in a noxious stimulus produces a disproportionate drop in perceived pain. This thesis investigates whether morphine, an opioid analgesic, modulates offset analgesia, using thermal stimulation, subjective pain ratings (visual analogue scale), and electroencephalography (EEG). Across conditions with and without morphine, the decrease in pain attributable to offset analgesia was significantly greater during morphine treatment, indicating that opioidergic mechanisms enhance this inhibitory response. EEG findings were less clear and did not provide a definitive neural signature, but overall support an opioidergic influence on offset analgesia. Specific details such as sample size and dosing regimen are not provided in the excerpt. The results advance understanding of how pharmacological activation of endogenous pain modulation interacts with offset analgesia and highlight the need for further studies to clarify physiological mechanisms and EEG correlates.
Offset-analgesi er et kraftigt endogent smerteinhiberende fænomen, hvor en lille reduktion i et noxisk stimulus giver en uforholdsmæssigt stor nedgang i oplevet smerte. Denne afhandling undersøger, om morfin, et opioid smertestillende middel, modulerer offset-analgesi, ved brug af termisk stimulation, subjektive smertevurderinger (visuel analog skala) og elektroencefalografi (EEG). På tværs af betingelser med og uden morfin var smertereduktionen, der kan tilskrives offset-analgesi, signifikant større under morfinbehandling, hvilket indikerer at opioiderge mekanismer forstærker denne inhiberende respons. EEG-fundene var mindre klare og gav ikke en entydig neural signatur, men samlet set understøtter de en opioiderg indflydelse på offset-analgesi. Specifikke detaljer som deltagerantal og dosering fremgår ikke af uddraget. Resultaterne bidrager til forståelsen af, hvordan farmakologisk aktivering af endogen smertemodulation interagerer med offset-analgesi, og peger på behovet for yderligere studier for at afklare fysiologiske mekanismer og EEG-korrelater.
[This apstract has been generated with the help of AI directly from the project full text]