Utilising electrodermal activity sensor signals to quantify nociceptive response during movement activities.

Abstract

Objective With an increasingly ageing population and osteoarthritis prevalence, the quantification of nociceptive signals responsible for painful movements and individual responses could lead to better treatment and monitoring solutions. Changes in electrodermal activity (EDA) can be detected via changes in skin conductance (SC) and measured using finger electrodes on a wearable sensor, providing objective information for increased physiological stress response. Results To provide EDA response preliminary data, this was recorded with healthy volunteers on an array of activities while receiving a noxious stimulus. This provides a defined scenario that can be utilised as protocol feasibility testing. Raw signal extraction, processing and statistical analysis was performed using mean SC values on all participant data. Extra exploratory analysis on a case study was incorporated using various decomposition tools. The application of the stimuli resulted in a 35% average increase in mean SC with considerable gender differences in SC and self-reported pain scores. Though EDA parameters are a promising tool for nociceptive response indicators, limitations including motion artifact sensitivities and lack of previous movement-based EDA published data result in restricted analysis understanding. Refined processing pipelines with signal decomposition tools will be necessary to incorporate into a protocol that quantifies nociceptive response clinically meaningfully.