• 터널과지하공간
• /
• 제23권6호
• /
• pp.521-537
• /
• 2013

EGS지열발전을 위한 수리자극시 발생되는 미소진동은 투수율 증가의 범위를 파악하는 유용한 수단이 되기도 하지만 지반진동으로 인하여 지상구조물 및 환경에 영향을 미친다. 본 연구는 EGS 지열발전의 수리자극에 의하여 발생하는 미소진동의 안전관리 기준을 수립하기 위하여 지반진동이 건축구조물 및 인체환경에 미치는 영향과 각국의 허용기준을 발파진동을 중심으로 조사 하였다. 또한 유럽과 미국에서 지열발전의 수리자극에 의한 미소진동의 연구사례를 조사 검토하여 포항 EGS 수리자극에 의한 지반진동의 관리 기준에 필요한 자료와 그 대처방안을 제시 하였다.

• 한국융합학회논문지
• /
• 제11권9호
• /
• pp.31-37
• /
• 2020

본 연구는 뇌졸중 환자에게 과제 지향적 훈련과 진동 자극을 결합한 중재에 경두개 직류 전류 자극을 융합했을 때 상지 기능의 회복에 미치는 영향을 알아보고자 하였다. 총 20명을 대상으로 총 4주간, 주 5회, 30분씩 실시했으며, 경 두개 직류 전류 자극을 융합한 과제 지향적 훈련과 진동자극의 결합 중재의 실험군과 과제 지향적 훈련과 진동자극의 결합 중재의 대조군으로 나누었다. 측정은 손의 기민성과 상지기능의 회복을 측정하였다. 실험군과 대조군은 손의 기민성과 잡기, 쥐기, 큰 동작 움직임에서 유의한 개선을 보였으며(p<.05), 실험군은 손의 기민성과 잡기, 쥐기 동작에서 대조군 보다 유의한 개선을 보였다(p<.05). 중재 전후 효과 크기는 모든 평가 항목에서 작은 효과이상을 보였다. 본 연구 결과를 근거로 하여 임상 환경에서 보다 효과적이고 효율적인 재활 치료를 할 수 있을 것으로 사료된다.

• 재활치료과학
• /
• 제4권2호
• /
• pp.63-71
• /
• 2015

Objective : The purpose of this study was to investigate the effects of vibratory stimulation applied to the left forearm on unilateral neglect in patients with stroke. Methods : The subjects were 11 unilateral neglect patients with stroke. They were divided into 2 groups; 6 experimental subjects and 5 control subjects. Both groups received standardized rehabilitation program and occupational therapy for the intervention of unilateral neglect in a day. In random order, line bisection test (LBT), Albert test, and star cancellation test (SCT) were conducted at baseline, the next day. During the process of all assessments of the next day, vibration stimulation was provided for the 6 subjects in the experimental group (EG), while the 5 subjects in CG carried out all assessments without vibration stimulation. Result : No significant differences were found between groups on any demographic variable or baseline assessments scores. In the next day, there was significant improvement in the EG for the LBT(p<0.05), Albert's test(p<0.05), and SCT(p<0.05). However, there was no significant improvement in the CG for the LBT(p<0.05), Albert's test(p<0.05), and SCT(p<0.05). Conclusion : These result indicate that vibratory stimulation has a positive effect on the unilateral neglect, and may be considered as alternative choice in clinical occupational therapy for reducing unilateral neglect.

• 한국전문물리치료학회지
• /
• 제26권1호
• /
• pp.19-27
• /
• 2019

Background: Compared to healthy people, patients with chronic lower back pain have reduced balance abilities which may cause proprioception problems, patients with chronic lower back pain avoid physical activities due to pain, and reduced activity levels lead to muscle weakening, which can further exacerbate pain. Recently, there have been many studies on the use of sensory stimulation; and among these studies, interventions that use vibrational stimulation have shown functional improvements in the patients. Objects: This study examined the effects of a stabilization exercise with vibration stimulation on the balance ability and disability in patients with chronic back pain. Methods: The subjects of the study were 30 persons who were randomly assigned to the experimental group and the control group, with 15 subjects in each. The subjects were evaluated before and after intervention via a balance ability test, the Korean Oswestry disability index (KODI) test, a pain test, and a proprioceptive sensory test. Both groups received general physical therapy. The experimental group performed the stabilization exercise with vibration stimulation, and the control group performed a general stabilization exercise, three times a week for six weeks. Results: After the intervention, both groups showed significant improvements in the balance ability test, the KODI test, the pain test, and the proprioceptive sensory test. The experimental group showed statistically significant, higher improvements than the control group in the balance ability test, the KODI test, and the proprioceptive sensory test. Conclusions: The stabilization exercise with vibration stimulation for patients with chronic back pain has been reported to provide greater functional improvements than the conventional intervention method. Therefore, the stabilization exercise in a vibration stimulation environment could be a useful intervention for patients with chronic back pain.

• 대한통합의학회지
• /
• 제7권3호
• /
• pp.117-125
• /
• 2019

Purpose : The purpose of this study was to determine the effects of simultaneous application of focal vibration stimulation and task-oriented training on the improvement in upper extremity motor function after stroke. Methods : The study period was from January to April 2019; 23 patients who fulfilled the study eligibility criteria were enrolled. The participants were divided into two groups: the experimental group with vibration stimulation and task-oriented training and the control group with only task-oriented training. Training was conducted in a total of 20 sessions, 5 times a week for 30 minutes a day for 4 weeks. The amount of use of the affected and unaffected side by accelerometers, and Box and Block test (BBT), Action Research Arm Test (ARAT) was measured with a pre-test, a post-test. Wilcoxon Signed Rank Test and Analysis of Covariance were used to compare and analyze the changes within and between the groups. Results : Both the groups showed statistically significant changes in the results of the BBT and the ARAT, as well as the amount of use of the affected and unaffected side. Regarding the use of the affected side, BBT results, and the grasp and gross movement item of the ARAT showed significant changes in the experimental group compared with the control group. Conclusion : We found that simultaneous application of focal vibration stimulation and task-oriented training was more effective than task-oriented training alone. A large-scale comparative study involving a group that is only given vibration stimulation should be conducted for more generalizable results.

• The Journal of Korean Physical Therapy
• /
• 제34권5호
• /
• pp.193-197
• /
• 2022

Purpose: The purpose of this pilot study was to assess the feasibility of a proposed study "To investigate the effects of applying a vibration stimulation to the paretic and non-paretic sides on balance and gait in stroke patients" before proceeding with the main study. Methods: A total of 30 patients who had suffered a stroke and who met the selection criteria participated in this study. However, only 14 patients completed the study. The study subjects were randomly assigned to vibration stimulation on either both sides (B group) or the paralyzed side (P group). The interventions were applied for six weeks. The patients were assessed using the Berg balance scale (BBS), Timed up and go (TUG), 10-meter walk (10 MW), and 6-minute walk (6 MW) tests. Results: There was a significant difference before and after the application of vibration stimulation in the BBS, TUG, 10MW, and 6 MW tests in the B group (p<0.05). Similarly, there was also a significant difference observed in the 10 MW and 6 MW tests in the P group (p<0.05). The difference between the two groups was not significant in the BBS, TUG, 10 MW, and 6 MW tests (p>0.05). Conclusion: This pilot study suggests that it would be feasible to conduct a large-scale randomized controlled trial (RCT) to examine the effects of applying a vibration stimulation to the paretic and non-paretic sides, on the balance and gait in stroke patients.

• 디지털융복합연구
• /
• 제18권11호
• /
• pp.303-309
• /
• 2020

본 연구는 목 폄근 진동자극이 뇌졸중 환자의 편측무시와 균형에 미치는 효과를 알아보고자 실시하였다. 대상자 선정 기준에 맞는 뇌졸중 환자를 대상으로 전통적인 작업치료와 목 폄근 진동자극을 중재한 실험군 10명, 전통적인 작업치료와 편측무시 치료를 중재한 대조군 10명으로 나누어 30분씩, 주 5회, 총 8주에 걸쳐 중재를 실시하였다. 연구결과 실험군이 대조군에 비하여 편측무시와 균형이 유의한 차이를 보였다(p<.05). 본 결과를 통하여 목 폄근 진동자극은 뇌졸중 환자의 편측무시와 균형에 효과적임을 확인할 수 있었으며, 재활치료에서 유용하게 적용되리라 사료된다.

• Ocean Systems Engineering
• /
• 제7권1호
• /
• pp.39-51
• /
• 2017

Fishes detect various sensory stimuli, which may be used to direct their behavior. Especially, the visual and water flow detection information are critical for locating prey, predators, and school formation. In this study, we examined the specific role of these two different type of stimulation (vision and vibration) during the obstacle avoidance behavior of carp, Cyprinus carpio. When a visual obstacle was presented, the carp efficiently turned and swam away in the opposite direction. In contrast, vibration stimulation of the left or right side with a vibrator did not induce strong turning behavior. The vibrator only regulated the direction of turning when presented in combination with the visual obstacle. Our results provide first evidence on the innate capacity that dynamically coordinates visual and vibration signals in fish and give insights on the novel modulation method of fish behavior without training.

• 한국정밀공학회지
• /
• 제29권5호
• /
• pp.578-583
• /
• 2012

The pharmacological therapies and whole body vibration as non-pharmacological therapies were known to have adverse side effects. Therefore, partial stimulation was suggested and its effects were evaluated. This study aimed to evaluate the site-specific effects of partial stimulator for treatment of osteoporosis induced by estrogen deficiency. Sixteen virginal Sprague-Dawley rats (12 weeks old) were divided into 2 groups(no stimulation, stimulation groups). All rats were ovariectomised to induce osteoporosis. After 3 weeks of operation, the right tibiae in rats of stimulation group (frequency: 10Hz, cycle: 1500, strain on bone surface: $2000{\mu}{\varepsilon}$) were stimulated perpendicularly at right tibia by using partial stimulator for 6 weeks (3days/week). The right tibiae in rats were scanned, before stimulation (0 week) and at 6 weeks after stimulation by using in-vivo micro computed tomography. For investigation of changes in morphological characteristics, structural parameters were measured and calculated. At 6 weeks the morphological characteristics (relative value) in stimulation group were significantly enhanced than those in no stimulation group (p<0.05). In this study, we find that after 6 weeks of partial stimulation, the morphological characteristics of tibia trabecular bone were enhanced. Thus, we concluded that partial stimulation could be used to treat osteoporosis.

• 한국산학기술학회논문지
• /
• 제12권7호
• /
• pp.3109-3116
• /
• 2011

본 연구는 뇌병변으로 상지경직이 관찰되는 환자를 대상으로 자극방식에 따른 진동자극이 경직에 미치는 영향에 대하여 알아보고자 하였다. 뇌병변으로 인해 상지경직이 있는 21명의 환자가 연구에 참여하였고, 실험군 I: 길항근(상완삼두근)자극, 실험군II: 주동근(상완이두근)자극, 실험군III: 동시(상완삼두근 및 상완이두근)자극에 각 7명씩을 배정하여 진동자극을 실시하였다. 척수운동신경원 흥분성을 알아보기 위해 Neuro-EMG_Micro를 이용한 F파를 자극전, 자극 직후, 자극 10분 후, 자극 20분 후에 측정하였고, 임상적 평가로는 MAS(Modified Ashworth Scale)와 MFT(Manual Function Test)를 자극 전, 자극 20분 후에 평가하였다. 본 연구의 결과, MAS는 세군 모두 유의한 감소를 나타냈고, F파 진폭 및 F/M비에서는 세군 모두에서 자극 직후에서부터 유의한 감소를 나타냈으며, 실험군III에서 시간 경과상 변화량이 가장 크게 나타났다. MFT에서는 실험군II와 III에서 유의한 증가를 나타냈으며 특히, 실험군III에서 기능적 변화량이 가장 크게 나타났다. 이러한 결과는 경직근에 대한 진동자극시 경직 주동근이나 길항근에 대한 단일 자극 방식보다는 동시자극 방식이 척수운동신경원의 흥분성 감소 및 상지 운동 기능 향상에 더 효과적임을 확인할 수 있었다.