Hee-Kyung Jin

Effect of electrical stimulation on blood flow velocity and vessel size

Abstract Interferential current electrical stimulation alters blood flow velocity and vessel size. We aimed to investigate the changes in the autonomic nervous system depending on electrical stimulation parameters. Forty-five healthy adult male and female subjects were studied. Bipolar adhesive pad electrodes were used to stimulate the autonomic nervous system at the thoracic vertebrae 1-4 levels for 20 min. Using Doppler ultrasonography, blood flow was measured to determine velocity and vessel size before, immediately after, and 30 min after electrical stimulation. Changes in blood flow velocity were significantly different immediately and 30 min after stimulation. The interaction between intervention periods and groups was significantly different between the exercise and pain stimulation groups immediately after stimulation (p<0.05). The vessel size was significantly different before and 30 min after stimulation (p<0.05). Imbalances in the sympathetic nervous system, which regulates balance throughout the body, may present with various symptoms. Therefore, in the clinical practice, the parameters of electrical stimulation should be selectively applied in accordance with various conditions and changes in form.

The Effect of Electrical Stimulation Level on Autonomic Nerve System in Normal Adults

Abstract The purpose of this study was to investigate the effect the interferential current (IFC) stimulation level according to autonomic nerve system (ANS) of healthy adults. IFC measured with adhesive 2-pole electrodes padon T1 ∼ T4 spinal cord segment level that electrode stimulation of 20 min after. A total of 45 healthy adults participated in the study, who were randomly divided into three groups: 15 of sensory level stimulus group (100 bps,10 ∼ 12 ㎃ ), 15 of exercise level stimulus group (5 bps, 45 ∼ 50 ㎃ ), 15 of noxious level stimulus group (100 bps, 80 ∼ 90 ㎃ ). Measured items were sympathetic activity and parasympathetic activity. In order to identify the changes in measurement variables before electrode stimulation and after and 30 min stimulation. The comparison of sympathetic and parasympathetic activity in each group revealed that they was changes of after vs 30 min in afterelectrical stimulation time(p<.05). Key Words : Autonomic nervous system, Electrical stimulation level, Interferential current.

Comparison of Relative ñ-Power Spectral Electroencephalogram Activity Analysis According to Electrical Stimulation Levels in Normal Adults

Objective: To investigate the effect of interferential current (IFC) stimulation level on electroencephalogram (EEG) activation. Method: An adhesive 2-pole electrode pad was placed at the T1~T4 spinal cord segment level and electrical stimulation was applied for 20 minutes to 45 healthy male and female adults recruited from N University located in Gwangju Metropolitan City. Changes in EEG activation were analyzed before stimulation, immediately after stimulation and at 30 minutes after stimulation. This study was performed in three groups: sensory level stimulus group (100 bps, 10~12 mA), exercise level stimulus group (5 bps, 45~50 mA), and noxious level stimulus group (100 bps, 80~90 mA). Results: After IFC stimulation, subjects in each group showed significant differences in terms of the retention time of relative alpha power from each brain region and between-group interaction effects. Changes in EEG activation were different depending on the type of IFC stimulation (p<0.05). Conclusion: Electrical stimulation parameters in clinical practice should be selectively applied based on diverse changes and conditions.

The Change of Image and Organization after MicroCurrent Stimulation in Osteoarthritis in Rat

Purpose : This study investigated the effects of osteoarthritis therapy using images and histological diagnosis after microcurrents were applied to osteoarthritic rats. Methods : Osteoarthritis was induced with a mixture of 2% carrageenan and 2% kaolin. The mixture (0.1 ) was injected into the knee joints of rats. Osteoarthritis with articulation received microcurrent stimulation for four weeks (15 min/day, 5 days/week): treated with pulsation frequency of 5 pps and a stimulation intensity of 25 . Results : Osteoarthritis of the control group constantly changed. The group with a stimulation intensity of 25 applied to the surface of the articular cartilage experienced near normal recovery according to image diagnosis. The result of histological and immunohistochemistry inspection confirms that microcurrent stimulation had a positive effect on the treatment of osteoarthritis. Conclusion : The differences among images and histological diagnoses show that steoarthritis will experience constant progression from stimulation.