AI Article Synopsis
- The study focuses on how interoception, or the awareness of internal body states, plays a key role in experiencing emotions, while also noting that external events can trigger these emotions.
- By using advanced imaging techniques alongside physiological measurements, researchers found a strong link between heart activity and brain function, particularly in the posterior insula, which is crucial for processing internal states.
- The anterior insula acts as a hub that combines these internal signals with external emotional cues, helping to highlight important emotional moments in experiences like listening to music or audio films, paving the way for better understanding emotional issues in psychiatric conditions.
Article Abstract
Whilst external events trigger emotional responses, interoception (the perception of internal physiological states) is fundamental to core emotional experience. By combining high resolution functional neuroimaging with concurrent physiological recordings, we investigated the neural mechanisms of interoceptive integration during free listening to an emotionally salient audio film. We found that cardiac activity, a key interoceptive signal, was robustly synchronised across participants and centrally represented in the posterior insula. Effective connectivity analysis revealed that the anterior insula, specifically tuned to the emotionally salient moments of the audio stream, serves as an integration hub of interoceptive processing: interoceptive states represented in the posterior insula are integrated with exteroceptive representations by the anterior insula to highlight these emotionally salient moments. Our study for the first time demonstrates the insular hierarchy for interoceptive processing during natural emotional experience. These findings provide an ecologically-valid framework for elucidating the neural underpinnings of emotional deficits in neuropsychiatric disorders.
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| http://dx.doi.org/10.1016/j.neuroimage.2015.08.078 | DOI Listing |
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