Task-Induced Brain Deactivation from Rest
Author Information
Author(s): Harrison Ben J., Pujol Jesus, Contreras-Rodríguez Oren, Soriano-Mas Carles, López-Solà Marina, Deus Joan, Ortiz Hector, Blanco-Hinojo Laura, Alonso Pino, Hernández-Ribas Rosa, Cardoner Narcís, Menchón José M.
Primary Institution: Institut d'Alta Tecnologia-PRBB, CRC Mar, Hospital del Mar, Barcelona, Spain
Hypothesis
Increases in task demand will modulate the regional anatomy of deactivation in the brain.
Conclusion
Task-induced deactivations from rest extend beyond the default mode network to include non-DMN regions, particularly the posterior insular cortex.
Supporting Evidence
- Increases in task demand consistently modulated the regional anatomy of DMN deactivation.
- Robust deactivation was observed in non-DMN regions, most notably the posterior insular cortex.
- Deactivation of the posterior insular cortex was linked to experienced task difficulty.
Takeaway
When people do harder tasks, parts of their brain that usually rest become less active, even in areas not usually linked to those tasks.
Methodology
Fifty healthy adults performed two fMRI tasks designed to map brain deactivations from a resting baseline.
Limitations
The study did not explore the influence of the scanning environment on resting baseline activity.
Participant Demographics
50 healthy adults (25 female; mean age 31.8 years; range 18–52).
Statistical Information
P-Value
p<0.0001
Statistical Significance
p<0.0001
Digital Object Identifier (DOI)
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