Bibliographic Details
| Title: |
Salivary Secretion under the Influence of Bright/Dim Light Exposure inthe Morning and Evening in Humans. |
| Authors: |
Kanikowska, Dominika, Yamabayashi, Yuki, Tsuchida, Keiko, Ja Hyun, Ki, Tokura, Hiromi, Gotoh, Koichi, Kondo, Masayuki, Akimoto, Takako |
| Source: |
Biological Rhythm Research; Apr2002, Vol. 33 Issue 2, p129, 12p, 1 Diagram, 5 Graphs |
| Subject Terms: |
SALIVARY glands, LIGHT, SECRETION |
| Abstract: |
Recent studies show that bright and dim light intensities during the daytimehave important regulatory functions. Our present study was performed to evaluatethe effect of exposure to different light intensities during the morning andevening on salivary secretion and its sodium concentration. The study involved6 healthy, female volunteers who were exposed to dim light (100 lx) from 7:00to 17:00 and to bright light (3000 lx) from 17:00 to 23:00 one day, and tobright light (3000 lx) from 7:00 to 17:00 and dim light (100 lx) from 17:00to 23:00 on the next day. We collected salivary samples every 10 minutes during2 hours in the morning and in the evening by means of a Lashley cup. Salivasecretion was stimulated by sweet candy. The amount of saliva secreted wassignificantly greater in the morning under bright light exposure, while itwas significantly greater in the evening under dim light exposure. We discussthese findings in terms of changes in activity of the parasympathetic nervoussystem (PNS) and sympathetic (SNS) nervous system produced by exposure todifferent light intensities at different times of the day. [ABSTRACT FROM AUTHOR] |
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| Database: |
Complementary Index |
