Preoccupied with the body: mild stress amplifies the relation between rumination and interoception

Area of Science:

• Psychology
• Neuroscience
• Emotion Research

Background:

• Interoception, the perception of bodily sensations, is considered fundamental to emotion processing in both classic and modern theories.
• Rumination, a repetitive focus on distress and its causes/consequences, is often linked to emotional dysregulation.

Purpose of the Study:

• To investigate if individuals with high ruminative tendencies exhibit enhanced interoception, particularly under stressful conditions.
• To examine the relationship between rumination, stress, and objective/subjective measures of interoception.

Main Methods:

• Two studies were conducted involving participants varying in ruminative tendencies.
• A mild stressor was introduced to assess its effect on interoceptive sensibility (Study 1) and interoceptive accuracy (Study 2).
• Measures included self-reported private body consciousness and heartbeat detection accuracy, with and without auditory interference.

Main Results:

• Under mild stress, rumination positively correlated with self-reported interoceptive sensibility (Study 1).
• Rumination also correlated with enhanced heartbeat detection accuracy under stress, especially with auditory interference (Study 2).
• No significant association between rumination and interoception was found in the absence of stress.

Conclusions:

• Stress appears to amplify bodily sensations in individuals prone to rumination.
• This stress-induced enhancement of interoception may be a key factor in the emotional dysregulation observed in chronic ruminators.