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Is there any difference in human pupillary reaction to acupuncture between light- and dark-adaptive conditions?
MedLine Citation:
PMID:  22467247     Owner:  NLM     Status:  Publisher    
OBJECTIVES: To determine if acupuncture stimulation elicits a pupillary response under light adaptation and whether there is any difference in the pupillary response between light and dark adaptation environments during acupuncture stimulation. METHODS: The participants consisted of 55 healthy individuals who had no known eye diseases or pupil abnormalities. Experiment 1 compared pupillary responses between acupuncture stimulation and no-stimulation groups under light adaptation. Experiment 2 compared pupillary responses to acupuncture between two conditions (dark and light adaptation) with a two-period repeated measurement crossover design. For both experiments the pupil diameter was continuously measured for 3 min before stimulation, during stimulation and for 3 min after stimulation. For all acupuncture stimulation interventions an acupuncture needle was inserted superficially at the TE5 acupuncture point followed by gentle tapping stimulation for 90 s. RESULTS: In experiment 1 the pupil diameter was significantly decreased during (p<0.01) and after stimulation (p<0.0001) compared with the pupil diameter before stimulation under light adaptation. No significant difference was noted in the serial changes in pupil diameter in the no-stimulation group. In experiment 2 the pupil diameter was significantly decreased 90 s after stimulation (p<0.05) and 150 s after stimulation (p<0.05) under light adaptation conditions. Furthermore, the pupil diameter was significantly decreased 120 s after stimulation (p<0.05) and 150 s after stimulation (p<0.01) under dark adaptation conditions. No significant difference in the serial changes in pupil diameter was noted between the groups. CONCLUSIONS: This study shows that pupil constriction occurs following acupuncture stimulation under light adaptation and this response is no different from that seen under dark adaptation.
Hidetoshi Mori; Hiroshi Kuge; Tim Hideaki Tanaka; Yuya Kikuchi; Hiroshi Nakajo; Kazuhiko Yamashita; Kazushi Nishijo
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-3-31
Journal Detail:
Title:  Acupuncture in medicine : journal of the British Medical Acupuncture Society     Volume:  -     ISSN:  1759-9873     ISO Abbreviation:  -     Publication Date:  2012 Mar 
Date Detail:
Created Date:  2012-4-2     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9304117     Medline TA:  Acupunct Med     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
1Faculty of Health Science, Department of Health, Course of Acupuncture and Moxibustion, Tsukuba University of Technology, Tsukuba, Japan.
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