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Evaluation of the effects of manual acupuncture and electroacupuncture at LI4 and LI11 on perception thresholds: a prospective crossover trial

Evaluation of the effects of manual acupuncture and electroacupuncture at LI4 and LI11 on... Objective:The objective of the study was to investigate and compare the effects of manual acupuncture (MA) and electroacupuncture (EA) on current perception thresholds (CPTs) using quantitative methods.Methods:Twenty-nine healthy volunteers participated in this prospective crossover trial, in which three acupuncture methods were compared: control, MA, and EA. Acupuncture needles were inserted to a depth of 15 mm at LI4 and LI11 on the left side and retained for 30 min with or without electrical stimulation at a frequency of 2 Hz (EA and MA, respectively). The needles were removed and participants rested for 30 min. CPT in the left mental region was measured at 2000, 250, and 5 Hz, corresponding to the activation of Aβ, Aδ, and C-fibers, respectively, at four time points: baseline, T0; 15 min after needle application, T1; immediately after needle removal, T2; and 30 min after needle removal, T3. In the control session, only a sensory test was performed (without acupuncture).Results:Significant effects of time course on CPT were observed (p < 0.001). CPT values increased significantly at T1, T2, and T3, compared with those at T0, at all stimulation frequencies during MA and EA. Changes in CPT values with EA were not significantly greater than those with MA.Conclusions:Both MA and EA increased the sensory thresholds of Aβ, Aδ, and C-fibers in the mental region for ⩾30 min after needle removal. Additional of electrical stimulation may not confer additional benefits over needling alone.Trial registration number:UMIN000017983 (University Hospital Medical Information Network Clinical Trials Registry). http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Acupuncture in Medicine SAGE

Evaluation of the effects of manual acupuncture and electroacupuncture at LI4 and LI11 on perception thresholds: a prospective crossover trial

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Publisher
SAGE
Copyright
© The Author(s) 2023
ISSN
0964-5284
eISSN
1759-9873
DOI
10.1177/09645284221131339
Publisher site
See Article on Publisher Site

Abstract

Objective:The objective of the study was to investigate and compare the effects of manual acupuncture (MA) and electroacupuncture (EA) on current perception thresholds (CPTs) using quantitative methods.Methods:Twenty-nine healthy volunteers participated in this prospective crossover trial, in which three acupuncture methods were compared: control, MA, and EA. Acupuncture needles were inserted to a depth of 15 mm at LI4 and LI11 on the left side and retained for 30 min with or without electrical stimulation at a frequency of 2 Hz (EA and MA, respectively). The needles were removed and participants rested for 30 min. CPT in the left mental region was measured at 2000, 250, and 5 Hz, corresponding to the activation of Aβ, Aδ, and C-fibers, respectively, at four time points: baseline, T0; 15 min after needle application, T1; immediately after needle removal, T2; and 30 min after needle removal, T3. In the control session, only a sensory test was performed (without acupuncture).Results:Significant effects of time course on CPT were observed (p < 0.001). CPT values increased significantly at T1, T2, and T3, compared with those at T0, at all stimulation frequencies during MA and EA. Changes in CPT values with EA were not significantly greater than those with MA.Conclusions:Both MA and EA increased the sensory thresholds of Aβ, Aδ, and C-fibers in the mental region for ⩾30 min after needle removal. Additional of electrical stimulation may not confer additional benefits over needling alone.Trial registration number:UMIN000017983 (University Hospital Medical Information Network Clinical Trials Registry).

Journal

Acupuncture in Medicine – SAGE

Published: Jan 1, 2023

Keywords: acupuncture; anesthetics; complementary medicine; dental surgery; electroacupuncture; oral & maxillofacial surgery; pain management

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