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  • P-ISSN 1010-0695
  • E-ISSN 2288-3339

Effect of LI4-LI11 Transcutaneous Electrical Nerve Stimulation on Regional Cerebral Blood Flow in Healthy Human Using SPECT and Statistical Parametric Mapping

Journal of Korean Medicine / Journal of Korean Medicine, (P)1010-0695; (E)2288-3339
2008, v.29 no.4, pp.205-212










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Abstract

Background and purpose: So far it was reported that acupuncture increased cerebral blood supply and stimulated the functional activity of brain nerve cells. A previous study demonstrated a correlation between LI4-11 electro-acupuncture (EA) and rCBF increase in frontal lobe. However, there remained a need to study further using various controls in acupuncture research. Transcutaneous electrical nerve stimulation (TENS) has been used as a non-invasive control in acupuncture study. This study was to evaluate the effect of LI4-LI11 TENS on regional cerebral blood flow (rCBF) in normal volunteers using single photon emission computed tomography (SPECT) and statistical parametric mapping (SPM). Methods: In the resting state, 99mTc-ECD brain SPECT scans were performed on 10 normal volunteers (9 males, 1 female, mean age 26.6±0.5 years; age range from 26 to 27 years). On the other day, 7 days after the resting examination, 15 minute TENS were applied at LI 4 and LI 11 on the right side of the subjects. Immediately after LI4-LI11 TENS, the second SPECT images were obtained in the same manner as the resting state. Significant increases and decreases of regional cerebral blood flow after LI4-LI11 TENS were estimated by comparing their SPECT images with those of the resting state using paired t statistics at every voxel, which were analyzed by statistical parametric mapping with a threshold of p = 0.001, uncorrected (extent threshold: k=100 voxels). Results: TENS applied at right LI4-LI11 increased rCBF in the left somatosensory association cortex (Brodmann area 5, 7). However there was no area where LI4-11 TENS decreased rCBF. Conclusion and suggestions: These results demonstrate that right LI4-LI11 TENS increased rCBF only in corresponding somatosensory association cortex, which was different from the previous results using LI4-11 EA. It is suggested that there be a different mechanism between TENS and EA.

keywords
Transcutaneous electrical nerve stimulation(TENS), LI4, LI11, regional cerebral blood flow, SPECT, SPM(statistical parametric mapping)


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