POSTER PRESENTATION ABSTRACTS
Please note: All posters will be displayed in
Salons 10-12.
FRIDAY, 5:45-6:30 PM
Park K, Lee J, Kim J.
Acupuncture on L4(Hegu) of different sides have different
effects on pupil size change.
Department of Biomedical Engineering Kyung Hee
University saenim@khu.ac.kr
PURPOSE: To investigate the different effects
of the acupuncture on left and right side body, we observed the effect
of lateralized acupoint and non-acupoint stimulation on the pupil size
change
METHODS: 11 subjects, 20-24 years old males,
participated in the different four kinds of sensory stimulation (combination
of 'left and right side of body' and 'acupoint and non-acupoint') experiments.
LI4(hegu) was selected as an acupoint and index finger did as a non-acupoint.
After the dark adaptation of subject in the 0.5 lux-dark room, we acquired
the pupil image of subject with IR-camera based binocular system with
10 frames/sec during 5 minutes (One minute before the acupuncture, next
one minute during acupuncture manipulation for deqi, and lastly three
minutes during acupuncture insertion).
RESULT: For every four experiments, the left
pupil sizes was as same as right one at the respective experiment, and
during one minutes after sensory stimulation, pupil dilated as compared
with the first one minute as a base. However, during last three minutes,
pupil size did not change in the case of right side acupoint stimulation
in contrast to other three cases that pupil shrinks obviously. And the
subjective pain level of participants is largest at left side non-acupoint
and the others show the same level. The result of our non-acupoint stimulation
agrees with other researches that left side show lower pain threshold.
But there was no different pain threshold between both sides in the
case of our acupoint stimulations.
CONCLUSIONS: The most important thing is that
the pupil size was obviously smaller at the left side acupoint stimulation
than at the right side acupoint stimulation. To the contrary, the pupil
sizes at the left and right side non-acupoint stimulation shows the
same tendency. The results can be inferred that left side acupoint stimulation
triggers more activation of opioid system rather than right side. And
also, it can be interpreted that the lateralized activation of brain
and limbic system induced by lateralized acupoint stimulation affects
the Edinger-Westphal nucleus as the mediator of myosis. Furthermore,
the relation with lateralized acupuncture and brain lateralization will
be investigated concerned with pupil size parameters, brain activities
and clinic efficacy.
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