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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 3D 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 3: The results from 3D 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 3D mental rotation, the correct rates (Figures 3A,B) and reaction times (Figures 3C,D) of the four divers exhibited considerable impairment and large variability across individual, with reaction times ranging 58.0%∼226.0% and correct rates 37.5%∼118.8%. Correct rates of all the four divers declined as compression processed, while diver C and D were less impaired than A and B (ranged 77.8%∼105.6%, 84.2%∼105.3% vs. 37.5%∼118.8%, 56.3%∼100.0%, in compared to baseline). There was enormous variability on reaction times of four divers. Only small impairment was detected on diver C during the compression and decompression but that became a little greater after the dive, on the contrary, the reaction times of diver A and B increased throughout the dive until they came back to the surface. The pattern of reaction time for diver D was different from above, whose reaction time increased as compression was performed but restored since the depth of 463 in compression.


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 3D 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 3: The results from 3D 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 3D mental rotation, the correct rates (Figures 3A,B) and reaction times (Figures 3C,D) of the four divers exhibited considerable impairment and large variability across individual, with reaction times ranging 58.0%∼226.0% and correct rates 37.5%∼118.8%. Correct rates of all the four divers declined as compression processed, while diver C and D were less impaired than A and B (ranged 77.8%∼105.6%, 84.2%∼105.3% vs. 37.5%∼118.8%, 56.3%∼100.0%, in compared to baseline). There was enormous variability on reaction times of four divers. Only small impairment was detected on diver C during the compression and decompression but that became a little greater after the dive, on the contrary, the reaction times of diver A and B increased throughout the dive until they came back to the surface. The pattern of reaction time for diver D was different from above, whose reaction time increased as compression was performed but restored since the depth of 463 in compression.

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.