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진희경(Jin, Hee-Kyung),조성현(Cho, Sung-Hyoun) 한국산학기술학회 2015 한국산학기술학회논문지 Vol.16 No.3
본 연구의 목적은 척수분절레벨에 적용한 간섭전류의 자극수준에 따른 정상성인의 자율신경계에 미치는 영향을 알아 보고자 하였다. 간섭전류는 T1-T4 분절에 접착식 패드전극을 2극 배치 후 20분간 전기자극하여, 전기자극 전과 후, 30분 후의 변화를 확인하였다. 연구대상은 광주시에 소재한 N대학교에 다니는 건강한 성인남녀 45명을 대상으로 감각자극수준은 100 bps, 10∼12 ㎃, 운동자극수준은 5 bps, 45∼50 ㎃, 유해자극수준은 100 bps, 80∼90 ㎃으로 각각 15명씩 무작위 배치하여 연구를 수행하였으며 연구 결과는 다음과 같다. 각 집단의 교감신경활성도의 변화는 시간과 집단 간의 상호작용에 유의한 차이가 없었으나, 시간에 따라 유의한 변화를 보여주었다(p<.05). 사후 분석결과 전기자극 직후와 전기자극 후 30분에서 유의 한 차이를 보여주었다(p<.05). 각 집단의 부교감신경활성도의 변화는 시간과 집단 간의 상호작용에 유의한 차이가 없었으나, 시간에 따라 유의한 변화를 보여주었다(p<.05). 사후 분석결과 전기자극 직후와 전기자극 후 30분에서 유의한 차이를 보여주 었다(p<.05). 이상의 결과로 전기자극 수준은 특정목적과 상황에 따라 다양하게 적용되어야 할 것으로 생각된다. 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 pad on 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 after electrical stimulation time(p<.05).
미세전류자극 강도가 흰쥐의 골관절염 회복에 미치는 영향
진희경 ( Hee Kyung Jin ),박장성 ( Jang Sung Park ),김종만 ( Jong Man Kim ) 한국전문물리치료학회 2011 한국전문물리치료학회지 Vol.18 No.1
Osteoarthritis is a degenerative joint disease and is led to physical disability. Yet the development of effective disease-modifying treatments has lagged. In this study, I examined the effect of physical therapeutic intervention through microcurrent stimulation and attempt to find which degree of intensity, either 25 ㎂ or 500 ㎂ with a regular 5 pps pulse, is more effective in the osteoarthritis. Osteoarthritis was induced with a mixture of 2% carrageenan and 2% kaolin in 26 male Sprague-Dawley rats. The mixture(0.1 ㎖) was injected into the intra-articular capsule of knee joint once a week for three weeks. Five animals did not show degenerative changes by radiological findings and excluded in the following experiment. Osteoarthritic animals were randomly divided into 3 groups(n1, n2, n3=7/each): untreated, treated with 25 ㎂, treated with 500 ㎂. All experimental groups received microcurrent stimulation for four weeks (15 min/day, 5 days/week). The ethological inspection of foot print analysis on the walking corridor was accomplished every week. Histological preparations and immunohistochemical staining with insulin-like growth factor-1 were also done in the articular cartilages. All of these parameters were compared with those of osteoarthritic control group (n=7). The ethological inspection of foot print analysis revealed that changes of walking track (paw width) and stride length was significantly increased in both experimental groups. The better results were observed in experimental group treated with 25 ㎂ intensity without significance than group treated with 500 ㎂. Histological preparations disclosed that routine hyaline cartilage of articular surface were altered to fibrous cartilage in untreated group and experimental group treated with 500 ㎂ intensity. But a little changes were seen in experimental group treated with 25 ㎂ intensity. Immunolocalization of insulin-like growth factor-1 was simultaneously decreased according to the duration of osteoarthritis, and did not show significant difference among the groups. In this study discovered that the microcurrent stimulation, especially 25 ㎂ intensity, had a positive effect by the ethological inspection, histological and immunohistochemical stainings. These results suggest that microcurrent stimulation with low-intensity might be effective in the promotion of healing process for the osteoarthritis.
최진호(Jin-Ho Choi),이현(Hyun Lee),진희경(Hee-Kyung Jin),배재성(Jae-Sung Bae),김규만(Gyu-Man Kim) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
In this presentation, we demonstrate a new method for neuron culture in micropattern by using micro-engineered template, micro stencil. The micro-engineered template helps selective adhesion of cells in localized area of substrates allowing culture of micropatterned cells. Stencils were fabricated by PDMS casting form SU-8 mold prepared by photolithography. Primary cortical neurons prepared from mouse embryo were used in culture tests. After 7 days of culture, the neurons were successfully cultured in micropatterns. This method for cell localization could be useful in cell-chip and various bio-system.
한정희,진희경,김종택,Han Jeong-hee,Jin Hee-kyung,Kim Jong-taek 한국임상수의학회 1994 한국임상수의학회지 Vol.11 No.2
A lymphosarcoma was diagnosed in a 4-year-old female Formosan sika deer presented with persistent reproductive failure, anorexia, depression and diarrhea. Characteristic pathological findings were infiltration of neoplastic lymphoid cells and cancer emboli in the lymph nodes, heart, lung, kidney, urinary bladder, ovary, uterus and peritoneal fat tissue.