認知心理学研究8(1): 63-72 (2010)

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腐腉腈腃腍腅腇腋腓腖腀腑腏腒腕腂腊腄腁腌腆 1), 2) 膶臎 膳臞膛膍臲膡膟膰膛腠腓腷 膳臞膛膍臲膡膟膰膛膺膭膍膘臫臗膏臹至膈膛臙膽The e#ect of long-term exposure to a hyperbaric environment on cognitive performance Nozomu KAGEYAMA (Department of Psychology, Graduate School of Human-Environment Studies, Kyushu University) Yuji HAKODA (Faculty of Human-Environment Studies, Kyushu University) Koji OZAWA (Undersea Medical Center, Japan Maritime Self Defense Force) When people work at deep sea locations, they are always exposed to hyperbaric environments. For example, an environmental pressure of 440 MSW (meters of sea water) is equivalent to 45 times the atmospheric pressure (45 ATA: atm absolute). In this study, we examine the e#ects of long- term exposure to hyperbaric environments on cognitive performance using the Stroop and the re- verse-Stroop Color-Word interference tests (group version) and two psychological stress question- naires. These tests were administrated during a simulated 440 MSW saturation dive. Twenty-four professional male divers (age: 362.82) served as the participants. The level of Stroop interference during the dive period was highest at the maximum environmental pressure. In contrast, psycholog- ical stress was not detected throughout the dive. These results indicate that the magnitude of en- vironmental pressure rather than psychological stress caused the increase in Stroop interference. We argue that cognitive impairment under hyperbaric environments is caused by the magnitude of the environmental pressure, rather than psychological stress. Key words : deep saturation diving, hyperbaric exposure, Stroop interference, isolation, confine- ment 膺膭腤腌腉腟膤膡腦臆膅膟膰臌臕腤致腘腳臯腺腒腸臚膖腬腺腒腸臆膅膟膰 腟膃腛腈腝腾腡腦膢膵腤腞腉腟至臰 440 m 腱膄臹至膴臕腦腹腺腾腄腼膝臧腡 2 腦臯腺腒腹腺 膀腹臘臓腦腮腙腤腰腝腟膸腖腛腹腺腾腄腼膝臧腧膟膰膅腎臊臕腤臊腮臆腐腣腝腛腖腍腖膟膰膅 腎膾臤腘腳腤腞腴腟腹腺腾腄腼膝臧腮膾臤腖臕腤腧膴膙臐臺腦腝腛腦臯腺腒腹腺膀腹腤腞腉腟腧臆膅腟膃腤腰腳膼腣膄膓腯腮腙腧腣腐膤膡腦臈膚腤腰腳膎膱 腮腣腍腝腛膺膭腶腗腟臆膅膟膰膒腤腌腑腳腛腈腝腾腶膨腘腳膋腧臆膅腟膃膤膡膚腤腰 膆腯腊腞腣腢腦臯腺腒腸膋腠腧腣腐膟膰膅腦腏腕腡腉腝腛腬腺腒腸膋腠腈腳腓腡腎臖腕腴腛腷腄膁腄腻 腱膄臹至臆膅腟膃腹腺腾腄腼膝臧臚膖腬腺腒臰膘腤臉臩腖腛膠腦膌腏臫腒腯臬膊膬臢腠腧腉腫 腜腤臲膡腤腰腳臅膹腏腉臰膘腠腦臹至臍膲腧臫腡腧膇腣腳膟膰臭膷膒腠臄腵腴腳腦膟膰膅腧 至臰 10 m 腔腡腤 1 膦膅臫臥腘腳膿臌臲膡腧至臰 686 m 腫腠腦臹至腎膕腠腈腳腓腡腎臙自腕腴腟腉腳 (Logue, Schmitt, Rogers, & Strong, 1986). 腋腨至臰 686 m 腩腦臹至腶臙臑腘腳臋臹至膊腧68.5 腦臆膅膟膰腤腟膃腕腴腳腓腡腤腣腳腡腒腤臲膡腰腳臹至腧腴腒腦膘腦臰腫腠腦臹 臄腘腳膔膅膤腴腒腦臰腠腦腁腎腘腳膅膤腚腖腟 臫腤膥腘腳膾膅膤腦臄臹臄腘腳臰腏腕腯腁腎腘腳臕膡腤膐腗腟膾膅腤腘腳臕膡腧腡腒腤膘腍腱腦膫臫腧腃腤腒腣臹至腠腈 腳膾膅臨腤腰腳膣膻腶膗腘腳腛腭腤臄腵腙臹臄腘腳 腏腉腪腢膾膅臕膡腧腐腣腳腋腨臫膩 腠膮腒腛至臰 686 m 腩臹至腖腛臋腦臫腤膥腘腳腫 1) 臃腧腀 臛腎膘臫臗膏臹至膈膛臙膽臌臷臕腤 臄腝腛臙膽腠腈腳腁 2) 臃腦臍臵腤腈腛腲腀 腐腦膪臠腣腸腽膂腺腶臔腲腫 腖腛膳臞膛腦臀臁臄臸臶腀 膑膈腽腫膛 腅膿 臡臼腂 膛腆 腦臦膃膧臸臶腤腧腀 臰腐膞臜臱腖臫 腒腫腘腁 腫腛膺膭腦臙臑腤腈腛腲腔膯腉腛腜腉腛膘 臫臗膏臹至膈膛臙膽腱膄臹至膊腶腧腗腭腡腘腳 臮膊腦腃腤腀 臠腥腟臯腰腲膞臜臱腖臫腒腫腘腁 腛腈膛膺膭 8 1 2010 6372 63

Transcript of 認知心理学研究8(1): 63-72 (2010)

Page 1: 認知心理学研究8(1): 63-72 (2010)

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The e#ect of long-term exposure to a hyperbaric environment on cognitive performance

Nozomu KAGEYAMA (Department of Psychology, Graduate School of Human-Environment Studies,Kyushu University)Yuji HAKODA (Faculty of Human-Environment Studies, Kyushu University)Koji OZAWA (Undersea Medical Center, Japan Maritime Self Defense Force)

When people work at deep sea locations, they are always exposed to hyperbaric environments.For example, an environmental pressure of 440 MSW (meters of sea water) is equivalent to 45times the atmospheric pressure (45 ATA: atm absolute). In this study, we examine the e#ects of long-term exposure to hyperbaric environments on cognitive performance using the Stroop and the re-verse-Stroop Color-Word interference tests (group version) and two psychological stress question-naires. These tests were administrated during a simulated 440 MSW saturation dive. Twenty-fourprofessional male divers (age: 36�2.82) served as the participants. The level of Stroop interferenceduring the dive period was highest at the maximum environmental pressure. In contrast, psycholog-ical stress was not detected throughout the dive. These results indicate that the magnitude of en-vironmental pressure rather than psychological stress caused the increase in Stroop interference.We argue that cognitive impairment under hyperbaric environments is caused by the magnitude ofthe environmental pressure, rather than psychological stress.

Key words : deep saturation diving, hyperbaric exposure, Stroop interference, isolation, confine-ment

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