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Mental abilities and performance efficacy under a simulated 480-m helium-oxygen saturation diving.

Hou G, Zhang Y, Zhao N, Chen R, Xiao W, Yu H, Wang J, Yuan TF - Front Psychol (2015)

Bottom Line: Stress in extreme environment severely disrupts human physiology and mental abilities.The present study investigated the cognition and performance efficacy of four divers during a simulated 480 meters helium-oxygen saturation diving.We conclude that the human cognition and performance efficacy are significantly affected during deep water saturation diving.

View Article: PubMed Central - PubMed

Affiliation: Institute of Cognitive Neuroscience and Department of Psychology, Zhejiang Sci-Tech University Hangzhou, China.

ABSTRACT
Stress in extreme environment severely disrupts human physiology and mental abilities. The present study investigated the cognition and performance efficacy of four divers during a simulated 480 meters helium-oxygen saturation diving. We analyzed the spatial memory, 2D/3D mental rotation functioning, grip strength, and hand-eye coordination ability in four divers during the 0-480 m compression and decompression processes of the simulated diving. The results showed that except for its mild decrease on grip strength, the high atmosphere pressure condition significantly impaired the hand-eye coordination (especially above 300 m), the reaction time and correct rate of mental rotation, as well as the spatial memory (especially as 410 m), showing high individual variability. We conclude that the human cognition and performance efficacy are significantly affected during deep water saturation diving.

No MeSH data available.


The results from 2D mental rotation. (A) Correct rate for four divers, (B) Correct rate on Average, (C) Reaction time for four divers, (D) Reaction time on average.
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Figure 2: The results from 2D mental rotation. (A) Correct rate for four divers, (B) Correct rate on Average, (C) Reaction time for four divers, (D) Reaction time on average.

Mentions: In 2D mental rotation, the correct rates for four divers (Figure 2A) and average (Figure 2B) exhibited mild changes during the compression and decompression phases (ranged 85%∼111.11% of baseline). While the reaction times of four divers (Figure 2C) and the average (Figure 2D) exhibited greater fluctuations (ranged 67.31%∼151.22% of baseline). There was also noticeable variability among individual divers. The correct rates were worse than baseline for diver A, B, and D (ranged 85%∼100% of baseline), but better for diver C (ranged 100∼111.11% of baseline). The variability of reaction time of the four divers was much larger. Reaction times were negatively affected as compression continued until the depth of 410 m for diver B, C, and D, but not for diver A (except the depth of 150 m in compression and 400 m in decompression).


Mental abilities and performance efficacy under a simulated 480-m helium-oxygen saturation diving.

Hou G, Zhang Y, Zhao N, Chen R, Xiao W, Yu H, Wang J, Yuan TF - Front Psychol (2015)

The results from 2D mental rotation. (A) Correct rate for four divers, (B) Correct rate on Average, (C) Reaction time for four divers, (D) Reaction time on average.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4496554&req=5

Figure 2: The results from 2D mental rotation. (A) Correct rate for four divers, (B) Correct rate on Average, (C) Reaction time for four divers, (D) Reaction time on average.
Mentions: In 2D mental rotation, the correct rates for four divers (Figure 2A) and average (Figure 2B) exhibited mild changes during the compression and decompression phases (ranged 85%∼111.11% of baseline). While the reaction times of four divers (Figure 2C) and the average (Figure 2D) exhibited greater fluctuations (ranged 67.31%∼151.22% of baseline). There was also noticeable variability among individual divers. The correct rates were worse than baseline for diver A, B, and D (ranged 85%∼100% of baseline), but better for diver C (ranged 100∼111.11% of baseline). The variability of reaction time of the four divers was much larger. Reaction times were negatively affected as compression continued until the depth of 410 m for diver B, C, and D, but not for diver A (except the depth of 150 m in compression and 400 m in decompression).

Bottom Line: Stress in extreme environment severely disrupts human physiology and mental abilities.The present study investigated the cognition and performance efficacy of four divers during a simulated 480 meters helium-oxygen saturation diving.We conclude that the human cognition and performance efficacy are significantly affected during deep water saturation diving.

View Article: PubMed Central - PubMed

Affiliation: Institute of Cognitive Neuroscience and Department of Psychology, Zhejiang Sci-Tech University Hangzhou, China.

ABSTRACT
Stress in extreme environment severely disrupts human physiology and mental abilities. The present study investigated the cognition and performance efficacy of four divers during a simulated 480 meters helium-oxygen saturation diving. We analyzed the spatial memory, 2D/3D mental rotation functioning, grip strength, and hand-eye coordination ability in four divers during the 0-480 m compression and decompression processes of the simulated diving. The results showed that except for its mild decrease on grip strength, the high atmosphere pressure condition significantly impaired the hand-eye coordination (especially above 300 m), the reaction time and correct rate of mental rotation, as well as the spatial memory (especially as 410 m), showing high individual variability. We conclude that the human cognition and performance efficacy are significantly affected during deep water saturation diving.

No MeSH data available.