Effects of face/head and whole body cooling during passive heat stress on human somatosensory processing

Nakata, Hiroki; Namba, Mari; Kakigi, Ryusuke; Shibasaki, Manabu

doi:10.1152/ajpregu.00039.2017

Cited by 7 publications

(7 citation statements)

References 38 publications

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“…Our data suggest that ascending signals in human somatosensory processing, including subcortical and cortical levels, were delayed by decreases in body temperature. In contrast, our previous studies using SEPs revealed that the conduction velocity of the as- cending somatosensory input was accelerated by increases in body temperature (36,39,41). We also showed the delay in the latency of SEPs during whole body skin cooling after passive heat stress (41).…”

Section: Discussioncontrasting

confidence: 76%

“…The peak amplitude of each component was identified immediately prior (i.e., peakto-peak). Based on previous studies (33,36,40,41), we focused on the C4= and Fz electrodes. Peak latencies at C4= were identified in the P14, N20, P25, N35, P45, and N60 components.…”

Section: Methodsmentioning

confidence: 99%

“…The latencies and amplitudes of P14, N20, P25, N35, P45, and N60 components are recorded by centroparietal electrodes contralateral to the stimulated site when the median nerve is stimulated. We previously reported the effects of passive heat stress (36,41), aerobic exercise under different thermal conditions (39), and acute hypoxia on human somatosensory processing (40) on SEPs. For example, we previously showed 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 (36,41).…”

Section: Introductionmentioning

confidence: 99%

“…We previously reported the effects of passive heat stress (36,41), aerobic exercise under different thermal conditions (39), and acute hypoxia on human somatosensory processing (40) on SEPs. For example, we previously showed 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 (36,41). However, the effect of whole body skin cooling on SEPs has not been elucidated.…”

Section: Introductionmentioning

confidence: 99%

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Effects of whole body skin cooling on human cognitive processing: a study using SEPs and ERPs

Nakata

Kobayashi

Lawley

et al. 2019

American Journal of Physiology-Regulatory, Integrative and Comp

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The present study investigated the effect of whole body skin cooling on somatosensory ascending processing by utilizing somatosensory-evoked potentials (SEPs) and motor execution, as well as inhibitory processing by event-related potentials (ERPs). Fourteen healthy participants wearing a water-perfused suit performed two sessions ( sessions 1 and 2) consisting of SEPs and ERPs with somatosensory Go/No-go paradigms under two conditions (cold stress and control) on different days. In session 2, under the cold stress condition, whole body skin cooling was achieved by circulating 20°C water through the suit for 40 min, whereas 34°C water was perfused in the other sessions. The mean skin temperature decreased from 35.0 ± 0.5°C ( session 1) to 30.4 ± 0.9°C ( session 2) during whole body skin cooling, but the internal temperature was maintained. Whole body skin cooling delayed the peak latencies of N20, P25, and P45 components at C4′ of SEPs (all: P < 0.05). Moreover, the peak latencies of P14, N18, and P22 components at Fz of SEPs and the Go-P300 component of ERPs were delayed (all: P < 0.05). In contrast, the peak amplitudes of all individual components of SEPs as well as N140 and P300 of ERPs remained unchanged. These results suggest that passive whole body skin cooling delays neural activities on somatosensory processing and higher cognitive function.

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Section: Discussioncontrasting

confidence: 76%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effects of whole body skin cooling on human cognitive processing: a study using SEPs and ERPs

Nakata

Kobayashi

Lawley

et al. 2019

American Journal of Physiology-Regulatory, Integrative and Comp

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“…However, as mentioned above, to avoid the effect of sweat on the EEG paste, we reattached all electrodes just before ERP recordings in Heat and Recovery sessions. Our previous study using the same procedure as in the present study showed that the amplitudes of some components in somatosensory evoked potentials (SEPs) reduced during passive heat stress, but other components did not [22,23]. If the presence of sweat influences the SEP waveforms, all SEP components should be distorted.…”

Section: The Effect Of Task Modality and Difficulty On Eeg-erpsmentioning

confidence: 48%

Effects of passive heat stress and recovery on human cognitive function: An ERP study

2021

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Using event-related potentials (ERPs), we investigated the effects of passive heat stress and recovery on the human cognitive function with Flanker tasks, involving congruent and incongruent stimuli. We hypothesized that modulation of the peak amplitude and latency of the P300 component in ERP waveforms would differ with task difficulty during passive heat stress and recovery. Subjects performed the Flanker tasks before (Pre), at the end of whole body heating (Heat: internal temperature increase of ~1.2°C from the pre-heat baseline), and after the internal temperature had returned to the pre-heat baseline (Recovery). The internal temperature was regulated by a tube-lined suit by perfusing 50°C water for heat stress and 25°C water for recovery immediately after the heat stress. Regardless of task difficulty, the reaction time (RT) was shortened during Heat rather than Pre and Recovery, and standard deviations of RT (i.e., response variability) were significantly smaller during Heat than Pre. However, the peak amplitudes of the P300 component in ERPs, which involved selective attention, expectancy, and memory updating, were significantly smaller during Heat than during Pre, suggesting the impairment of neural activity in cognitive function. Notably, the peak amplitudes of the P300 component were higher during Recovery than during Heat, indicating that the impaired neural activity had recovered after sufficient whole-body cooling. An indicator of the stimulus classification/evaluation time (peak latency of P300) and the RT were shortened during Heat stress, but such shortening was not noted after whole-body cooling. These results suggest that hyperthermia affects the human cognitive function, reflected by the peak amplitude and latency of the P300 component in ERPs during the Flanker tasks, but sufficient treatment such as whole-body cooling performed in this study can recover those functions.

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Effects of hypocapnia and hypercapnia on human somatosensory processing

Nakata

Kakigi

Kubo

et al. 2023

Neuroscience Research

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Effects of face/head and whole body cooling during passive heat stress on human somatosensory processing

Cited by 7 publications

References 38 publications

Effects of whole body skin cooling on human cognitive processing: a study using SEPs and ERPs

Effects of whole body skin cooling on human cognitive processing: a study using SEPs and ERPs

Effects of passive heat stress and recovery on human cognitive function: An ERP study

Effects of hypocapnia and hypercapnia on human somatosensory processing

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