Fig. 2: Trends in the Use of Physiological Signals for Pain Assessment Research from 2014 to 2024.
From: Pain assessment using physiological responses/markers in different types of pain: a scoping review
The figure illustrates the publication trends on the use of physiological signals in pain assessment over the past decade. Individual categories represent specific physiological signals, while the “Others” category includes all signals reported in the literature that were not assigned to a predefined group. The polynomial line labelled “Poly. (Total)” depicts the overall trajectory of publications addressing pain assessment with physiological signals during this period.
