E3 PreliminaryModerate confidencePEM not requiredCross-SectionalPeer-reviewedMachine draft
Standard · 3 min
Inducing Somatic Symptoms in Functional Syndrome Patients: Effects of Manipulating State Negative Affect.
Van Den Houte, Maaike, Bogaerts, Katleen, Van Diest, Ilse et al. · Psychosomatic medicine · 2017 · DOI
Quick Summary
This study looked at whether negative emotions can trigger or worsen physical symptoms in people with ME/CFS and fibromyalgia. Researchers showed patients and healthy people emotionally negative, neutral, and positive pictures, then asked them to report what physical symptoms they felt. Patients with ME/CFS and fibromyalgia reported more symptoms after viewing negative pictures, while healthy people did not. The effect was stronger in patients who had difficulty recognizing their own feelings or who became deeply absorbed in things.
Why It Matters
Understanding how emotional states influence symptom perception in ME/CFS is important because it helps explain symptom variability and identifies which patients may benefit from emotion-focused interventions. The finding that difficulty identifying feelings moderates this effect suggests that targeted emotional awareness training could be a therapeutic avenue. This research contributes to understanding the brain-symptom relationship in ME/CFS without suggesting symptoms are 'all in the head.'
Observed Findings
ME/CFS and fibromyalgia patients reported 2.36 more somatic symptoms after viewing negative pictures compared to neutral pictures (p<.001)
Healthy controls showed no significant difference in symptom reports across negative, neutral, or positive picture conditions
Alexithymia (specifically difficulty identifying feelings) moderated the symptom-enhancing effect of negative affect induction (p=.016)
Absorption (tendency to become deeply engaged in experiences) also moderated the effect (p=.006)
Trait negative affectivity did not significantly moderate the symptom-enhancing effect
Inferred Conclusions
Negative affective states reliably elicit elevated somatic symptom reports specifically in ME/CFS and fibromyalgia patients, not in healthy controls
Emotional processing difficulties (difficulty identifying feelings) and cognitive absorption amplify the relationship between mood and symptom perception in these conditions
Symptom perception in ME/CFS may follow predictive coding mechanisms where the brain's expectations about somatic sensations are shaped by emotional state
Targeting emotional identification ability could reduce symptom-enhancing effects of negative affect
Remaining Questions
What This Study Does Not Prove
This study does not prove that ME/CFS symptoms are primarily caused by emotions or negative thinking. It shows a correlation between induced negative affect and reported symptoms in a laboratory setting, which may not reflect real-world disease mechanisms. The study cannot determine whether this emotional-symptom relationship reflects genuine pathophysiology, altered perception, or both, and the findings in healthy controls' lack of response suggest ME/CFS patients may have distinct biological vulnerability to this effect.
Tags
Symptom:PainFatigue
Method Flag:PEM Not DefinedWeak Case DefinitionSmall SampleMixed Cohort
About the PEM badge: “PEM required” means post-exertional malaise was an explicit required diagnostic criterion for participant inclusion in this study — not that PEM was studied, observed, or discussed. Studies using criteria that do not require PEM (e.g. Fukuda, Oxford) are tagged “PEM not required”. How the atlas works →