Background: Previous physiology-driven pain studies focused on examining thepresence or intensity of physical pain. However, people experience various typesof pain, including social pain, which induces negative mood; emotional distress;and neural activities associated with physical pain. In particular, comparison ofautonomic nervous system (ANS) responses between social and physical pain inhealthy adults has not been well demonstrated.Methods: We explored the ANS responses induced by two types of pain—social pain, associated with a loss of social ties; and physical pain, caused bya pressure cuff—based on multimodal physiological signals. Seventy-threehealthy individuals (46 women; mean age = 20.67 ± 3.27 years) participated.Behavioral responses were assessed to determine their sensitivity to pain stimuli.Electrocardiogram, electrodermal activity, photoplethysmogram, respiration,and finger temperature (FT) were measured, and 12 features were extractedfrom these signals.Results: Social pain induced increased heart rate (HR) and skin conductance (SC)and decreased blood volume pulse (BVP), pulse transit time (PTT), respirationrate (RR), and FT, suggesting a heterogeneous pattern of sympathetic–parasympathetic coactivation. Moreover, physical pain induced increased heartrate variability (HRV) and SC, decreased BVP and PTT, and resulted in no changein FT, indicating sympathetic-adrenal-medullary activation and peripheralvasoconstriction.Conclusion: These results suggest that changes in HR, HRV indices, RR, and FTcan serve as markers for differentiating physiological responses to social andphysical pain stimuli.
KSP Keywords
Behavioral responses, Blood volume pulse(BVP), Electrodermal Activity, Mean age, Nervous system, Neural Activity, Physical pain, Physiological responses, Pulse transit time, Sensitivity to, Skin conductance
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