This study evaluates the modulation of phasic pain and empathy for pain induced by placebo analgesia during pain and empathy for pain tasks. Because pain can be conceptualized as a dangerous stimulus that generates avoidance, we evaluated how approach and avoidance personality traits modulate pain and empathy for pain responses. We induced placebo analgesia to test whether this also reduces self-pain and other pain. Amplitude measures of the N1, P2, and P3 ERPs components, elicited by electric stimulations, were obtained during a painful control, as well as during a placebo treatment expected to induce placebo analgesia. The placebo treatment produced a reduction in pain and unpleasantness perceived, whereas we observed a decrease in the empathy unpleasantness alone during the empathy pain condition. The moderator effects of the fight-flight-freeze system (FFFS) in the relationships linking P2 and P3 amplitude changes with pain reduction were both significant among low to moderate FFFS values. These observations are consistent with the idea that lower FFFS (active avoidance) scores can predict placebo-induced pain reduction. Finally, in line with the revised Reinforcement Sensitivity Theory (r-RST), we can assume that phasic pain is an aversive stimulus activating the active-avoidance behavior to bring the system back to homeostasis.

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Background: Brain cortical activity in resting electroencephalogram (EEG) recordings can be considered as measures of latent individual disposition to approach/avoidance behavior. This systematic review aims to provide an updated overview of the relationship between resting EEG cortical activity and approach/avoidance motivation personality traits. Methods: The review process was conducted according to the PRISMA-Statement, using PsycArticles, MEDLINE, Scopus, Science Citation Index, and Research Gate database. Restrictions were made by selecting EEG studies conducted in resting idling conditions, which included approach/avoidance personality traits or parallel measures, and an index of EEG brain activity. In the review 50 studies were selected, wherein 7120 healthy adult individuals participated. Results: The study of the relationship between resting EEG cortical activity and approach/avoidance personality traits provides controversial and unclear results. Therefore, the validity of resting asymmetry or frequency oscillations as a potential marker for approach/avoidance personality traits is not supported. Conclusions: There are important contextual and interactional factors not taken into account by researchers that could mediate or moderate this relationship or prove it scarcely replicable. Further, it would be necessary to conduct more sessions of EEG recordings in different seasons of the year to test the validity and the reliability of the neurobiological measures.

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A previous study showed that about 80% of Italian adolescents reported isolated symptoms of acute or post-traumatic stress during the first lockdown in Italy. We proposed a new questionnaire to investigate the presence of symptoms related to anxiety, panic, depression, eating disorders, sleep disorders, social withdrawal, stress disorders, psychotic symptoms, anti-conservative thoughts, and self-harming acts aggravated by COVID-19 restrictions and possible differences between males and females. 500 adolescents (12–18 years) completed an online survey created using validated scales. 41% of the respondents felt more stress than during the first lockdown. 1.85% showed suprathreshold symptoms for post-traumatic stress disorder and 21% showed isolated symptoms of acute or post-traumatic stress due to the pandemic. In addition, we found psychotic symptoms (16%), panic (25% suprathreshold), anxiety (46.8% suprathreshold), depression (18.7% suprathreshold), eating-related symptoms (51%), sleep difficulties (57%), a tendency to social withdrawal after the pandemic (15%), suicidal ideation (30%), and self-harming behavior (9%). Furthermore, girls showed a more severe level of distress. The results show a high prevalence of symptoms because of the COVID-19 pandemic and confirm the need for easy access to support and treatment service to help contain the bio-psycho-social risk factors prompted by the current pandemic and promptly and effectively manage the consequences.