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Functional magnetic resonance imaging suggests automatization of the cortical response to inspiratory threshold loading in humans
- Source :
- Respiratory Physiology & Neurobiology, Respiratory Physiology & Neurobiology, 2013, 189 (3), ⟨10.1016/j.resp.2013.08.005⟩, Respiratory Physiology and Neurobiology, Respiratory Physiology and Neurobiology, Elsevier, 2013, 189 (3), ⟨10.1016/j.resp.2013.08.005⟩
- Publication Year :
- 2013
- Publisher :
- HAL CCSD, 2013.
-
Abstract
- Inspiratory threshold loading (ITL) induces cortical activation. It is sustained over time and is resistant to distraction, suggesting automaticity. We hypothesized that ITL-induced changes in cerebral activation may differ between single-breath ITL and continuous ITL, with differences resembling those observed after cortical automatization of motor tasks. We analyzed the brain blood oxygen level dependent (BOLD) signal of 11 naive healthy volunteers during 5 min of random, single-breath ITL and 5 min of continuous ITL. Single-breath ITL increased BOLD in many areas (premotor cortices, bilateral insula, cerebellum, reticular formation of the lateral mesencephalon) and decreased BOLD in regions colocalizing with the default mode network. Continuous ITL induced signal changes in a limited number of areas (supplementary motor area). These differences are comparable to those observed before and after overlearning of motor tasks. We conclude that the respiratory-related cortical activation observed in response to ITL is likely due to automated, attention-independent mechanisms. Also, ITL activates cortical circuits right from the first breath.
- Subjects :
- Pulmonary and Respiratory Medicine
Adult
Male
Physiology
Physical Exertion
Differential Threshold
Reticular formation
behavioral disciplines and activities
03 medical and health sciences
Young Adult
0302 clinical medicine
medicine
Image Processing, Computer-Assisted
Tidal Volume
Humans
Default mode network
ComputingMilieux_MISCELLANEOUS
030304 developmental biology
Cerebral Cortex
0303 health sciences
Brain Mapping
Blood-oxygen-level dependent
Supplementary motor area
medicine.diagnostic_test
General Neuroscience
[SCCO.NEUR]Cognitive science/Neuroscience
Brain
Overlearning
Magnetic Resonance Imaging
Respiration, Artificial
Oxygen
medicine.anatomical_structure
Inhalation
Cerebral cortex
Female
Psychology
Functional magnetic resonance imaging
Insula
Neuroscience
030217 neurology & neurosurgery
Subjects
Details
- Language :
- English
- ISSN :
- 15699048 and 18781519
- Database :
- OpenAIRE
- Journal :
- Respiratory Physiology & Neurobiology, Respiratory Physiology & Neurobiology, 2013, 189 (3), ⟨10.1016/j.resp.2013.08.005⟩, Respiratory Physiology and Neurobiology, Respiratory Physiology and Neurobiology, Elsevier, 2013, 189 (3), ⟨10.1016/j.resp.2013.08.005⟩
- Accession number :
- edsair.doi.dedup.....ed83c856fa1112d04a8c7ac108b18165