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Updated: Feb 22, 2026
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Method for Simultaneous fMRI/EEG Data Collection during a Focused Attention Suggestion for Differential Thermal Sensation
Published on: January 5, 2014
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Thalamocortical neural responses during hyperthermia: a resting-state functional MRI study
Jing Zhang1,2,3, Shaowen Qian4, Qingjun Jiang4
1a Institute of Biomedical Sciences , School of Physics and Electronics, Shandong Normal University , Jinan , Shandong , People's Republic of China.
Summary
Hyperthermia alters brain connectivity, impacting cognitive functions and thermal regulation. These neural changes in thalamocortical pathways are linked to behavioral responses during heat exposure.
Area of Science:
- Neuroscience
- Human Physiology
- Cognitive Science
Background:
- Hyperthermia was previously considered a simple physiological process.
- Recent research indicates hyperthermia involves complex cognitive processes.
- Altered subcortical and cortical activity during hyperthermia is known, but thalamocortical interactions remain unexplored.
Purpose of the Study:
- To investigate changes in thalamocortical functional connectivity during whole-body hyperthermia.
- To compare brain activity under hyperthermic (50°C) and normothermic (25°C) conditions.
- To explore the relationship between altered connectivity and cognitive performance.
Main Methods:
- Exploratory analysis of functional connectivity in thalamocortical pathways.
- Comparison between whole-body hyperthermia (1 hour at 50°C) and normothermia (25°C).
- Psychomotor Vigilance Test to assess behavioral reaction time.
Main Results:
- Weakened functional connectivity between prefrontal cortex/anterior cingulate cortex and thalamic nuclei during hyperthermia.
- Increased connectivity in motor, premotor, somatosensory, and temporal cortical areas with thalamic nuclei during hyperthermia.
- Prefrontal thalamocortical connectivity changes correlated with reaction time in the Psychomotor Vigilance Test.
Conclusions:
- Hyperthermia induces distinct alterations in thalamocortical pathways.
- These changes may underlie both physiological thermal regulation and cognitive/behavioral adjustments.
- Understanding these neural shifts is crucial for managing individuals exposed to extreme heat.
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