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Nakane H, Asami O, Yamada Y, Ohira
H.
Effect of negative air ions on computer operation, anxiety and
salivary chromogranin A-like immunoreactivity.
Int J Psychophysiol 2002 Oct;46(1):85
Research-Domain 37, Materials Department, Toyota Central R&D Laboratories,
Inc., Nagakute, 480-1192, Aichi, Japan
The effects of negative air ions on computer operation were examined
using a biochemical index of the activity of the sympathetic/adrenomedullary
system (i.e. salivary chromogranin A-like immunoreactivity (CgA-like
IR)) and a self-report questionnaire (State-Trait Anxiety Inventory,
Anxiety State-STAI-S).
Twelve female students carried out a word processing task for 40
min. The salivary CgA-like IR increased more than three times on
the task, but the salivary cortisol did not change. The increase
in the CgA-like IR level was attenuated by the exposure to negative
air ions during the task.
The exposure to the ions during the recovery period following the
task was effective for rapidly decreasing the CgA-like IR level
that had increased after the task. These effects by negative air
ions were also observed using STAI-S. Task performance was slightly
but significantly improved by the presence of negative air ions.
These results suggest that negative air ions are effective for the
reduction of and the prompt recovery from stress caused by computer
operation.
PMID: 12374649 [PubMed - in process].
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