Formation of non-veridical action-outcome associations following exposure to threat-related cues.

Acting in a goal-directed manner requires an ability to accurately predict the outcomes of one's actions. However, not much is known regarding how threat-related cues influence our ability to form action-outcome associations according to the environment's known causal structure. Here, we examined the extent to which threat-related cues influence individuals' tendency to form and act in accordance with action-outcome associations that do not exist in the external environment (i.

Reduced Heart Rate Variability in Patients With Medically Unexplained Physical Symptoms: A Meta-Analysis of HF-HRV and RMSSD.

Objective: Medically unexplained physical symptoms (MUPS) and related syndromes are common and place a substantial burden on both patients and society. Chronic psychological distress and dysregulation of the autonomic nervous system may be common factors associated with MUPS, although previous studies have reported mixed results. The aims of this meta-analysis are to provide an updated synthesis of studies investigating heart rate variability (HRV) indices associated with autonomic nervous system functioning in three common MUPS syndromes and to explain inconsistencies in previous study findings.