Neural circuitry underlying the interaction between emotion and asthma symptom exacerbation.
Level 4 - case-series / case-control
Cross-sectional mechanistic neuroimaging study in a single clinical group without a randomized comparator
PubMed 16141324 · doi:10.1073/pnas.0504365102
What was done
Investigators imaged individuals with asthma using functional magnetic resonance imaging (fMRI) after antigen exposure. Neural responses in the anterior cingulate cortex and insula during presentation of asthma-relevant emotional stimuli versus valence-neutral stimuli were compared and correlated with peripheral markers of inflammation and airway obstruction.
What was found
Activation in the anterior cingulate cortex and insula to disease-specific emotional stimuli was associated with peripheral markers of inflammation and airway obstruction, accounting for >= 40% of the variance in these peripheral measures. The abstract does not report specific effect sizes, confidence intervals, exact p-values, or participant counts.
Why it matters
This study provides evidence that central neural circuits involved in visceral perception and affective evaluation (the insula and anterior cingulate cortex) are directly linked to peripheral inflammatory and obstructive manifestations in asthma.
Limits
The sample size, participant selection criteria, specific antigen exposure protocol, and exact inflammatory markers measured are not reported in the abstract. The correlational design prevents determining whether central neural reactivity directly drives peripheral inflammation or reflects heightened afferent signaling from inflamed airways.
Cited by
- supports The insular cortex is involved in modulating the inflammatory response in the lungs of asthmatics and responds to psychosocial influences.