Effect of acupuncture stimulation of the auricular sympathetic point on evoked sudomotor response

Heart rate variability during auricular acupressure at the left sympathetic point on healthy volunteers: a pilot study

Introduction

This research is a pilot, single-blinded study investigating heart rate variability (HRV) during auricular acupressure at the left sympathetic point (AH7) in healthy volunteers.

Methods

There were 120 healthy volunteers with hemodynamic indexes (heart rate, blood pressure) within normal ranges, randomly divided into two groups AG and SG (in each group having a gender ratio 1:1, aged 20-29), to receive either auricular acupressure using ear seed (AG) or sham method using adhesive patches without seed (SG) at the left sympathetic point while lying in a supine position. Acupressure intervention lasted 25 min, and HRV was recorded by a photoplethysmography device-namely, Kyto HRM-2511B and Elite appliance.

Results

Auricular acupressure at the left Sympathetic point (AG) led to a significant reduction in heart rate (HR) (p < 0.05) and a considerable increase in HRV parameters demonstrated by HF (High-frequency power) (p < 0.05), compared to sham auricular acupressure (SG). However, no significant changes in LF (Low-frequency power) and RR (Respiratory rate) (p > 0.05) were observed in both groups during the process.

Conclusion

These findings suggest that auricular acupressure at the left sympathetic point may activate the parasympathetic nervous system while a healthy person is lying relaxed.

The Role of Acupuncture in Treating a Patient with a Gambling Disorder

Background

Addiction is a chronic/relapsing disorder characterized by compulsive seeking and continuous involvement despite dangerous consequences. It causes long-term changes in the brain. Gambling disorder is a nonsubstance behavioral addiction. An important feature of gambling disorder is maladaptive gambling behavior that is persistent and repetitive, and interferes with patients' personal lives, families, and/or activities. Acupuncture is a nonpharmacologic therapeutic modality for managing addiction, with good results.

Case

A 32-year-old man with a gambling disorder was referred from a psychiatry department. The patient had a history of gambling since high school. He began to gamble in larger amounts in 2019. The patient got antiseizure, antidepressant, and antipsychotic medications, and cognitive behavioral therapy in the psychiatry department. Manual acupuncture therapy was performed at GV 20, Ex-HN 1, Ex-HN 3, PC 6, ST 40, and LR 3. Electroacupuncture was performed at LI 4, LI 11, ST 36, SP 6, and ST 25. Laser acupuncture was performed at NADA protocol bilateral ear points. The patient also received scalp acupuncture for extrapyramidal symptoms After this combination of acupuncture therapy for 8 sessions, with pharmacotherapy and psychotherapy, the patient's condition improved.

Conclusions

Acupuncture produces positive results in patient with gambling disorders. It helps regulate the reward system; stimulates release of neurotransmitters in the brain; produces neuroprotective effects; and activates certain brain areas to suppress impulsivity and craving and to balance emotions. Acupuncture is thought to be related to increased blood flow in the frontal lobe, thereby increasing nerve metabolism, as well as regulating dopamine in the basal ganglia. A combination of acupuncture, pharmacologic agents, and psychotherapy has a positive synergistic effect in patients with gambling disorder.

The Effect of Auricular Acupuncture on the Pulse Rate: An Exploratory Randomised Controlled Trial

Advocates of auricular acupuncture believe that the internal organs are represented in the concha of the ear and can be affected by needling the appropriate area. These two areas of the body have a common innervation from the vagus nerve. The aim of this randomised, single-blind study was to determine whether stimulation of the ear produced changes in the pulse rate, an indicator of vagal tone. Doctor volunteers were needled in either the vagus area or a control area of the ear, and pulse rate changes were measured over the following 30 minutes. No significant differences were found in the pulse rate changes of the two groups. This study, which was limited in size and in other respects, found no evidence to support the concept that the body is represented on the ear.

The effects of auricular acupressure on weight loss and serum lipid levels in overweight adolescents

Auricular acupressure is widely used to reduce body weight. The current study was designed to test the efficacy of auricular acupressure on weight reduction and serum total cholesterol (TC), total triglycerides (TG), high density lipids (HDL) and low density lipids (LDL) in an eight-week, randomized controlled trial of three groups of 84 adolescents aged 18-20 with a body mass index (BMI) of 23 or higher. The control group received tape treatment only and the other two experimental groups were administered acupressure using either Japanese Magnetic Pearls or vaccaria seeds. All three groups were educated on reduced calorie diets, physical activity, weight loss, and lifestyle modification. During the eight-week trial, all participants were seen weekly for 10 min per session. Anthropometric measurements of BMI and TC, TG, HDL, and LDL were performed at weeks 0 and 8 for all participants. Changes in BMI, TC, TG, HDL, and LDL were calculated from baseline to trial completion. BMI was significantly increased in the control group by +0.0457 (p < 0.0001), it was decreased in the Japanese Magnetic Pearl group by -0.6982 (p < 0.0001) and the vaccaria seed group by -1.2341 (p < 0.0001). All three groups showed significant increases in TC, TG, HDL, and LDL. In conclusion, the current study shows that auricular acupressure employing Japanese Magnetic Pearls or vaccaria seeds can decrease BMI, with the vaccaria seed method showing the greatest reduction. Auricular acupressure did not result in decreased TC, TG, HDL, or LDL in the current eight-week protocol.

Investigation of specificity of auricular acupuncture points in regulation of autonomic function in anesthetized rats

Auricular acupuncture has been used for various autonomic disorders in clinical practice. It has been theorized that different auricular areas have distinct influence on autonomic functions. The present study aims to examine the effects of acupuncture stimulation at different auricular areas on cardiovascular and gastric responses. In male Sprague-Dawley rats anesthetized with pentobarbital sodium, five auricular areas, which were located at the apex of the helix (A(1)), the middle of the helix (A(2)), the tail of the helix (A(3)), the inferior concha (A(4)) and the middle of the antihelix (A(5)), had been selected for stimulation with manual acupuncture (MA) and different parameters of electroacupuncture (EA). A mild depressor response (6%-12% decrease from baseline) was evoked from A(1), A(3) and A(4) by MA and from all five areas by EA (100 Hz-1 mA). The biggest depressor response (-18.4+/-3.1 mmHg, p<0.001) was evoked from A(4). A small bradycardia was evoked by MA from A(4) and by EA at A(3), A(4) and A(5.) Increase in intragastric pressure (8-14 mmH(2)O) was evoked by MA from A(1), A(3) and A(4) and by EA at A(2.) These results show that similar patterns of cardiovascular and gastric responses could be evoked by stimulation of different areas of the auricle. The present results do not support the theory of a highly specific functional map in the ear. Rather, there is a similar pattern of autonomic changes in response to auricular acupuncture, with variable intensity depending on the area of stimulation.

Physiologic responses to acupuncture point stimulation: a pilot study to evaluate methods and instrumentation

The physiological responses to needle stimulation of an acupuncture point and a nearby control point were compared in six healthy participants. The electrocardiogram (ECG), respiration, and electrodermal response (EDR) were measured along with the times of needle insertion, interim needle stimulation and needle removal. In addition to the aforementioned, any relevant events such as movement of the subject, unexpected noise, etc were annotated.

Objective assessment of the sympatholytic action of the Nei-Kuan acupoint

From animal experiments and clinical trials, we can think that acupuncture of Nei-Kuan (EH-6) is effective in the control of some vegetative functions. We have tried to determine the real reach of these assumptions by means of simple quantitative measurement methods, such as detection of cardiac frequency and systolic and diastolic blood pressure, and the sympathetic electrical response. The experiments were performed on 29 healthy volunteers. Basal values of these parameters were recorded, and also after orthodox Nei-Kuan acupuncture, non-acupunctural point puncture, supine lying by 15 min, Chü-Tze (EH-3) acupuncture and bipolar electrical stimulus of the median nerve at the Nei-Kuan level in the wrist. Such conditions were designed to evaluate non-specific puncture, repose and direct median nerve stimulation influences in the effects of Nei-Kuan acupuncture. We conclude that Nei-Kuan acupuncture strongly inhibits sympathetic tone, with reduction of cardiac frequency, systolic blood pressure and an important reduction of the amplitude of the sympathetic electrical response; the latency of the electrical response was also prolonged. Some weak effects on blood pressure and cardiac frequency were observed also, as non-specific effects of puncture and median nerve stimulation. From previous anatomical data, we hypothesize that the level of such actions is suprametameric, with strong implication of the diencephalon and cerebral cortex.