1
|
Han W, Qian S, Jiang Q, Liu K, Li B, Sun G. Regional and long-range neural synchronization abnormality during passive hyperthermia. Behav Brain Res 2018; 341:9-15. [PMID: 29247749 DOI: 10.1016/j.bbr.2017.12.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2017] [Revised: 11/25/2017] [Accepted: 12/08/2017] [Indexed: 10/18/2022]
Abstract
Passive hyperthermia would impair wide-domain cognitive performances (e.g. attention, working memory), which may involve abnormal regional and long-range neural activity. Combining the regional homogeneity (ReHo) and seed-based functional connectivity analysis, this study investigated the regional and long-range neural synchronization abnormality during passive hyperthermia. We acquired the resting-state blood oxygenation level dependent (BOLD) data from twenty-three healthy male participants in two simulated thermal conditions: normothermic condition (NC) with temperature at 25°C for 1 h and hyperthermic condition (HC) with temperature at 50°C for 1 h. After scanning, participants were asked to perform an attention network test (ANT). Relative to NC participants, the participants in HC group exhibited decreased regional neural synchronization in the frontal-occipital cortex, specifically in the left opercular part of inferior frontal gyrus/insula, bilateral middle occipital gyrus, and posterior cingulate cortex/precuneus, but increased one in the left dorsal superior/middle frontal gyrus. Using these significantly differed ReHo clusters as seeds, we further performed functional connectivity analysis and found aberrant long-range neural synchronization in the orbital medial frontal cortex, temporal-parietal junction areas. Further neurobehavioral correlation analysis showed significant positive correlation between the regional ReHo alteration in left dorsolateral superior/middle frontal gyrus and executive control effect. Additionally, the functional connectivity of the orbital medial frontal cortex with the seeds "left superior/middle frontal gyrus" and "posterior cingulate cortex/precuneus" were negatively correlated with the increase of rectal temperature. In current study, the participants showed hyperthermia-induced brain activity disruptions, appearing as altered local ReHo and long-range functional connectivity, which might help understand the relationship between neuronal and circuit activities and physiological thermal sensation and regulation as well as behavioral changes.
Collapse
Affiliation(s)
- Wei Han
- Department of Scientific Research and Training, Jinan Military General Hospital, Jinan, Shandong, People's Republic of China
| | - Shaowen Qian
- Department of Medical Imaging, Jinan Military General Hospital, Jinan, Shandong, People's Republic of China
| | - Qingjun Jiang
- Department of Medical Imaging, Jinan Military General Hospital, Jinan, Shandong, People's Republic of China
| | - Kai Liu
- Department of Medical Imaging, Jinan Military General Hospital, Jinan, Shandong, People's Republic of China.
| | - Bo Li
- Department of Medical Imaging, Jinan Military General Hospital, Jinan, Shandong, People's Republic of China
| | - Gang Sun
- Department of Medical Imaging, Jinan Military General Hospital, Jinan, Shandong, People's Republic of China.
| |
Collapse
|
2
|
Xue Y, Li L, Qian S, Liu K, Zhou XJ, Li B, Jiang Q, Wu Z, Du L, Sun G. The effects of head-cooling on brain function during passive hyperthermia: an fMRI study. Int J Hyperthermia 2017; 34:1010-1019. [PMID: 29025324 DOI: 10.1080/02656736.2017.1392046] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Affiliation(s)
- Yan Xue
- Graduate School, Jinzhou Medical University, Jinzhou, China
- Department of Medical Imaging, Jinan Military General Hospital, Jinan, China
| | - Li Li
- Department of Medical Imaging, Jinan Military General Hospital, Jinan, China
- Institute of Postgraduates, The Second Military Medical University, Shanghai, China
| | - Shaowen Qian
- Department of Medical Imaging, Jinan Military General Hospital, Jinan, China
| | - Kai Liu
- Department of Medical Imaging, Jinan Military General Hospital, Jinan, China
| | - Xiaohong Joe Zhou
- Center for MR Research, and Department of Radiology, University of Illinois at Chicago, Chicago, IL, USA
| | - Bo Li
- Department of Medical Imaging, Jinan Military General Hospital, Jinan, China
| | - Qingjun Jiang
- Department of Medical Imaging, Jinan Military General Hospital, Jinan, China
| | - Zhuanzhuan Wu
- Graduate School, Jinzhou Medical University, Jinzhou, China
| | - Lexia Du
- Department of Medical Imaging, Jinan Military General Hospital, Jinan, China
| | - Gang Sun
- Department of Medical Imaging, Jinan Military General Hospital, Jinan, China
| |
Collapse
|
3
|
Zhang J, Qian S, Jiang Q, Gong G, Liu K, Li B, Yin Y, Sun G. Thalamocortical neural responses during hyperthermia: a resting-state functional MRI study. Int J Hyperthermia 2017; 34:891-899. [PMID: 28927330 DOI: 10.1080/02656736.2017.1382014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Abstract
The neural responses during hyperthermia, once thought of as simple physiological processes (e.g. thermal sensation and regulation), have now been recognised involving more cognitive processes, which would be of high importance to the management of those occupations during heavy heat exposure. Previous studies have demonstrated altered activity in localised subcortical clusters for thermal sensation and regulation, as well as cortical-cortical activity for behavioural tasks during hyperthermia. However, the involvement of cortical-subcortical activity during hyperthermia has not been investigated. In this study, we performed exploratory analyses comparing thalamocortical functional connectivity during whole body hyperthermic condition for an hour at 50 °C and normothermic condition at 25 °C. We found weakened functional connectivity of cortical fronto-polar/anterior cingulate cortex and prefrontal areas with the corresponding thalamic nuclei during hyperthermic versus normothermic comparisons. On the contrary, the motor/premotor, somatosensory and temporal cortical subdivisions showed increased connectivity with thalamic nuclei during hyperthermia. Thalamocortical connectivity changes in the prefrontal were identified to be correlated with the behavioural reaction time during psychomotor vigilance test after controlling for physiological variables. These distinct thalamocortical pathway alterations might reflect physiologically thermal sensation and regulation, as well as psychologically neural behaviour changes underlying cortical-subcortical activity during hyperthermia.
Collapse
Affiliation(s)
- Jing Zhang
- a Institute of Biomedical Sciences , School of Physics and Electronics, Shandong Normal University , Jinan , Shandong , People's Republic of China.,b Department of Radiation Oncology , Shandong Cancer Hospital and Institute , Jinan , Shandong , People's Republic of China.,c Shandong Province Key Laboratory of Medical Physics and Image Processing Technology , Jinan , Shandong , People's Republic of China
| | - Shaowen Qian
- d Department of Medical Imaging , Jinan Military General Hospital , Jinan , Shandong , People's Republic of China
| | - Qingjun Jiang
- d Department of Medical Imaging , Jinan Military General Hospital , Jinan , Shandong , People's Republic of China
| | - Guanzhong Gong
- b Department of Radiation Oncology , Shandong Cancer Hospital and Institute , Jinan , Shandong , People's Republic of China
| | - Kai Liu
- d Department of Medical Imaging , Jinan Military General Hospital , Jinan , Shandong , People's Republic of China
| | - Bo Li
- d Department of Medical Imaging , Jinan Military General Hospital , Jinan , Shandong , People's Republic of China
| | - Yong Yin
- b Department of Radiation Oncology , Shandong Cancer Hospital and Institute , Jinan , Shandong , People's Republic of China
| | - Gang Sun
- d Department of Medical Imaging , Jinan Military General Hospital , Jinan , Shandong , People's Republic of China
| |
Collapse
|
4
|
Nakata H, Oshiro M, Namba M, Shibasaki M. Effects of aerobic exercise under different thermal conditions on human somatosensory processing. Am J Physiol Regul Integr Comp Physiol 2016; 311:R629-R636. [PMID: 27465733 DOI: 10.1152/ajpregu.00153.2016] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2016] [Accepted: 07/27/2016] [Indexed: 11/22/2022]
Abstract
The present study aimed to investigate the effects of aerobic exercise on human somatosensory processing recorded by somatosensory evoked potentials (SEPs) under temperate [TEMP, 20°C and 40% relative humidity (RH)] and hot (HOT, 35°C and 30% RH) environments. Fifteen healthy subjects performed 4 × 15-min bouts of a moderate cycling exercise [mean power output: 156.5 ± 7.7 (SE) W], with a 10-min rest period and received a posterior tibial nerve stimulation at the left ankle before and after each exercise bout; SEPs were recorded in five sessions; 1st (pre), 2nd (post-1st exercise bout), 3rd (post-2nd exercise bout), 4th (post-3rd exercise bout), and 5th (post-4th exercise bout). The peak latencies and amplitudes of the P37, N50, P60, and N70 components at Cz were evaluated. The latencies of P37, N50, P60, and N70 were significantly shorter with the repetition of aerobic exercise, and these shortened latencies were significantly greater in the HOT condition than in the TEMP condition (P37: 3rd, P < 0.05, and 5th, P < 0.01; P60: 4th, P < 0.05, and 5th, P < 0.01; N70: 4th, P < 0.05, and 5th, P < 0.001). No significant differences were observed in the amplitudes of any SEP component under either thermal condition. These results suggest that the conduction velocity of the ascending somatosensory input was accelerated by increases in body temperature, and aerobic exercise did not alter the strength of neural activity in cortical somatosensory processing.
Collapse
Affiliation(s)
- Hiroki Nakata
- Department of Health Sciences, Faculty of Human Life and Environment, Nara Women's University, Nara, Japan; and
| | - Misaki Oshiro
- Graduate School of Humanities and Sciences, Nara Women's University, Nara, Japan
| | - Mari Namba
- Graduate School of Humanities and Sciences, Nara Women's University, Nara, Japan
| | - Manabu Shibasaki
- Department of Health Sciences, Faculty of Human Life and Environment, Nara Women's University, Nara, Japan; and
| |
Collapse
|
5
|
Nakata H, Oshiro M, Namba M, Shibasaki M. Effects of passive heat stress on human somatosensory processing. Am J Physiol Regul Integr Comp Physiol 2015; 309:R1387-96. [DOI: 10.1152/ajpregu.00280.2015] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2015] [Accepted: 10/14/2015] [Indexed: 11/22/2022]
Abstract
Herein, we investigated the effects of passive heat stress on human somatosensory processing recorded by somatosensory-evoked potentials (SEPs). Fifteen healthy subjects received a median nerve stimulation at the left wrist under two thermal conditions: Heat Stress and normothermic Time Control. The latencies and amplitudes of P14, N20, P25, N35, P45, and N60 at C4′ and P14, N18, P22, and N30 at Fz were evaluated. Under the Heat Stress condition, SEPs were recorded at normothermic baseline (1st), early in heat stress (2nd), when esophageal temperature had increased by ∼1.0°C (3rd) and ∼2.0°C (4th), and after heat stress (5th). In the Time Control condition, SEPs were measured at the same time intervals as those in the Heat Stress condition. The peak latencies and amplitudes of SEPs did not change early in heat stress. However, the latencies of P14, N20, and N60 at C4′ and P14, N18, and P22 at Fz were significantly shorter in the 4th session than in the 1st session. Furthermore, the peak amplitudes of P25 and N60 at C4′, and P22 and N30 at Fz decreased with increases in body temperature. On the other hand, under the Time Control condition, no significant differences were observed in the amplitudes or latencies of any component of SEPs. These results suggested that the conduction velocity of the ascending somatosensory input was accelerated by increases in body temperature, and hyperthermia impaired the neural activity of cortical somatosensory processing.
Collapse
Affiliation(s)
- Hiroki Nakata
- Department of Health Sciences, Faculty of Human Life and Environment, Nara Women's University, Nara, Japan; and
| | - Misaki Oshiro
- Graduate School of Humanities and Sciences, Nara Women's University, Nara, Japan
| | - Mari Namba
- Graduate School of Humanities and Sciences, Nara Women's University, Nara, Japan
| | - Manabu Shibasaki
- Department of Health Sciences, Faculty of Human Life and Environment, Nara Women's University, Nara, Japan; and
| |
Collapse
|
6
|
Liu K, Li B, Qian S, Jiang Q, Li L, Sun G. Altered interhemispheric resting state functional connectivity during passive hyperthermia. Int J Hyperthermia 2015; 31:840-9. [PMID: 26608616 DOI: 10.3109/02656736.2015.1058977] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
PURPOSE This study examines the effect of passive hyperthermia on interhemispheric resting state functional connectivity and the correlation between interhemispheric resting state functional connectivity and efficiency of a succedent working memory task. MATERIALS AND METHODS We performed voxel-mirrored homotopic connectivity (VMHC) analyses on resting state MRI data and a one-back task from 14 healthy subjects in both HT (hyperthermia, 50 °C) conditions and normal control (NC, 25 °C) conditions. The group analyses of the differences for VMHC between the two conditions and the correlation analysis between the VMHC and the reaction time (RT) of the one-back task were performed with the statistical parametric mapping software package and the software REST. RESULTS Compared with NC conditions, HT conditions increased VMHC in the cuneus, the postcentral gyrus, and the fusiform gyrus. No region showed decreased VMHC in the HT group in comparison with the NC group. For NC conditions, negative correlations were demonstrated between RT of the one-back task and VMHC in bilateral superior temporal gyrus, and bilateral middle frontal gyrus; for HT conditions, negative correlations were demonstrated between RT and VMHC in bilateral inferior frontal gyrus, bilateral middle frontal gyrus, as well as cerebellum posterior lobe. CONCLUSION Passive heat stress can impact the interhemispheric information interactions at resting state and the VMHC deficits may play an important role in cognitive dysfunction.
Collapse
Affiliation(s)
- Kai Liu
- a Department of Medical Imaging , Jinan Military General Hospital , Shandong , China
| | - Bo Li
- a Department of Medical Imaging , Jinan Military General Hospital , Shandong , China
| | - Shaowen Qian
- a Department of Medical Imaging , Jinan Military General Hospital , Shandong , China
| | - Qingjun Jiang
- a Department of Medical Imaging , Jinan Military General Hospital , Shandong , China
| | - Li Li
- a Department of Medical Imaging , Jinan Military General Hospital , Shandong , China
| | - Gang Sun
- a Department of Medical Imaging , Jinan Military General Hospital , Shandong , China
| |
Collapse
|
7
|
Qian S, Sun G, Jiang Q, Liu K, Li B, Li M, Yang X, Yang Z, Zhao L. Altered topological patterns of large-scale brain functional networks during passive hyperthermia. Brain Cogn 2013; 83:121-31. [PMID: 23959081 DOI: 10.1016/j.bandc.2013.07.013] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2013] [Revised: 07/27/2013] [Accepted: 07/28/2013] [Indexed: 11/27/2022]
Abstract
In this study, we simulated environmental heat exposure to 18 participants, and obtained functional magnetic resonance image (fMRI) data during resting state. Brain functional networks were constructed over a wide range of sparsity threshold according to a prior atlas dividing the whole cerebrum into 90 regions. Results of graph theoretical approaches showed that although brain networks in both normal and hyperthermia conditions exhibited economical small-world property, significant alterations in both global and nodal network metrics were demonstrated during hyperthermia. Specifically, a lower clustering coefficient, maintained shortest path length, a lower small-worldness, a lower mean local efficiency were found, indicating a tendency shift to a randomized network. Additionally, significant alterations in nodal efficiency were found in bilateral gyrus rectus, bilateral parahippocampal gyrus, bilateral insula, right caudate nucleus, bilateral putamen, left temporal pole of middle temporal gyrus, right inferior temporal gyrus. In consideration of physiological system changes, we found that the alterations of normalized clustering coefficient, small-worldness, mean normalized local efficiency were significantly correlated with the rectal temperature alteration, but failed to obtain significant correlations with the weight loss. More importantly, behavioral attention network test (ANT) after MRI scanning showed that the ANT effects were altered and correlated with the alterations of some global metrics (normalized shortest path length and normalized global efficiency) and prefrontal nodal efficiency (right dorsolateral superior frontal gyrus, right middle frontal gyrus and left orbital inferior frontal gyrus), implying behavioral deficits in executive control effects and maintained alerting and orienting effects during passive hyperthermia. The present study provided the first evidence for human brain functional disorder during passive hyperthermia according to graph theoretical analysis using resting-state fMRI.
Collapse
Affiliation(s)
- Shaowen Qian
- Department of Medical Imaging, Jinan Military General Hospital, Shandong, People's Republic of China
| | | | | | | | | | | | | | | | | |
Collapse
|