Department of Health Sciences, Faculty of Human Life and Environment, Nara Women's University, Nara, Japan.
Department of Sport Science, University of Innsbruck, Innsbruck, Austria.
Am J Physiol Regul Integr Comp Physiol. 2019 Sep 1;317(3):R432-R441. doi: 10.1152/ajpregu.00087.2019. Epub 2019 Jul 10.
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 ( and ) consisting of SEPs and ERPs with somatosensory Go/No-go paradigms under two conditions (cold stress and control) on different days. In , 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 () to 30.4 ± 0.9°C () 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: < 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: < 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.
本研究利用体感诱发电位（SEPs）和运动执行以及事件相关电位（ERPs）的抑制处理，研究了全身皮肤冷却对体感传入处理的影响。14 名健康参与者穿着水灌注服，在不同的日子里进行了两次（和）会话，其中包含体感 Go/No-go 范式的 SEPs 和 ERPs，在两种条件（冷应激和对照）下进行。在中，在冷应激条件下，通过在套装中循环 20°C 的水 40 分钟来实现全身皮肤冷却，而在其他会话中则灌注 34°C 的水。平均皮肤温度从 35.0 ± 0.5°C ()下降到 30.4 ± 0.9°C ()，但内部温度保持不变。全身皮肤冷却延迟了 SEPs 的 N20、P25 和 P45 成分在 C4'的峰潜伏期（均：<0.05）。此外，SEPs 的 Fz 处的 P14、N18 和 P22 成分以及 ERPs 的 Go-P300 成分的峰潜伏期也被延迟（均：<0.05）。相比之下，SEPs 的所有单个成分的峰幅度以及 ERPs 的 N140 和 P300 保持不变。这些结果表明，被动全身皮肤冷却会延迟体感处理和更高认知功能的神经活动。
