• 한국전문물리치료학회지
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• 제28권2호
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• pp.108-116
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• 2021

Background: Whole-body vibration (WBV) has been used to alleviate proprioceptive damage by musculoskeletal and neurological conditions. However, no study has determined whether wearing shoes while applying WBV can affect proprioception precision of the knee joint. Objects: This study aimed to determine the differences in the proprioceptive precision of the knee joint before and after WBV and to compare the proprioceptive precision of the knee joint between barefoot and shoe-wearing conditions. Methods: This study recruited 33 healthy participants. A passive-to-active angle reproduction test was used to measure the proprioception precision of the knee joint using an electrogoniometer, and the target angle was set to a knee flexion of 30°. Proprioception precision was calculated using the error angle (angular difference from 30°). Proprioceptive precision was measured in weight-bearing and non-weight-bearing positions before and after applying WBV for 20 minutes at 12 Hz in barefoot and shoe-wearing conditions. Mixed repeated analysis of variance was used to determine the differences in changes in the proprioceptive precision of the knee joint according to foot conditions. Results: There were significant improvements in the weight-bearing (p = 0.002) and non-weight-bearing (p < 0.001) proprioceptive precision of the knee joint after applying WBV. However, there was no significant difference in the change in proprioceptive precision of the knee joint after applying WBV between the barefoot and shoe-wearing conditions. Conclusion: WBV stimulation had an immediate effect on improving the proprioceptive precision of the knee joint. However, foot conditions (barefoot or shoe-wearing) during WBV application did not influence the proprioceptive precision of the knee joint.

• 한국전문물리치료학회지
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• 제26권3호
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• pp.11-22
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• 2019

Background: Sling exercises are frequently used for the rehabilitation process of patients with shoulder joint injuries, but research on the significant frequency intensity and appropriate treatment duration for sling exercises with local vibration stimulation is lacking. Objects: The aim of this study was to investigate the effects of sling exercise with vibration on shoulder range of motion (ROM), muscle strength, pain, and dysfunction in patients with a medical diagnosis of shoulder joint injury. Methods: Twenty-two patients were randomly assigned to the experiment and control groups. Six sling exercises with and without 50 Hz vibrations were applied in the experiment and control groups, respectively. Each exercise consisted of 3 sets of 5 repetitions performed for 6 weeks. The assessment tools used included shoulder joint range of motion, muscle strength, pain level, and shoulder pain and disability index for functional disability. We conducted re-evaluations before and 3 and 6 weeks after intervention. The changes in the measurement variables were analyzed and compared between the two groups. Results: The ROM of the external rotation of the shoulder joint had a significant interaction between the group and the measurement point (F=3.652, p<.05). In both groups, we found a significant increase in external rotation angle between the measurement points (p<.05). The flexor strength of the shoulder joint significant interaction between the group and the measurement point (F=4.247, p<.05). Both the experiment (p<.01) and control groups (p<.05) showed a significant increase in shoulder flexor strength at the measurement points. After 6 weeks of the interventions, both the groups showed significantly improved VAS (p<.01), SPADI (p<.01), and orthopedic tests (p<.01). However, there was no significant difference between the group and the measurement point in terms of the clinical outcomes observed. Conclusion: The sling exercise with local vibration of 50 Hz affected the external rotation of the shoulder range of motion and improved shoulder flexor strength in the patients with shoulder injuries. Therefore, we propose the use of the sling exercise intervention with vibration in the exercise rehabilitation of patients with shoulder joint injuries.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2003년도 ICCAS
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• pp.2753-2758
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• 2003

Tactile sensation is essential for many manipulation and exploration tasks not only in a real environment but also in a virtual environment. In this paper, we discuss a conceptual design of an integrated tactile display system. The system comprises two parts: a 2 DOF force feedback device for kinesthetic display and a tactile feedback device for displaying the normal stimulation to skin and the skin slip/stretch. Psychophysical experiments measure the effects of fingerpad selection, the direction of finger movements and the texture width on tactile sensitivity. We also investigate characteristics of lateral finger movement while subjects perceive different textures. From the experimental results, the principal parameters for designing a tactile display are suggested. A tactile display device is implemented using eight piezoelectric bimorphs and a linear actuator, and is attached to a 2 DOF translational force feedback device to simultaneously simulate texture and stiffness of the object.

• 동의생리병리학회지
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• 제17권4호
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• pp.893-897
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• 2003

We study the health tools for silver longevity on the theory of the material basis & vital and mental activities. The results are as follows. The navel herb-moxibustion tool strengthen material basis in the low elixir-field. The method is the fumigation of navel by the aroma of herb. The detailed micro-wave tool strengthen Ki(vital energy) in the middle elixir-field by the multi-method of the recognition-stimulation, micro-vibration, micro-current. The mystical pillow being composed of thirty two herbs strengthen mental activity in the upper elixir-field. The three methods are the synthetic, practical, familiar health tools for silver longevity.

• 동의생리병리학회지
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• 제17권2호
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• pp.263-274
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• 2003

The present condition of study on the wave-resonance for the bio-KI is observed. And the probroms of reception attendent on the stimulation of wave is observed centering around the sensory organ. The results is as follows: In the wave-resonant stand point, the tendency of studying on KI is showed in the several field all over the world. Because it is originated radionics, the wave-resonant tools of MRA insistenting minute-magnetism-resonance-apparatus need the more severe data in the side of electric circuit. The wave resonance apparatus according to the frequency occurance transmits low-frequency's vibration ratio to the electric stimulating aspect. The wave-water is considered on the application of wave-resonance transcription on the water, and needs the comprehension of torsion-field level. The wave-stimulation of the bio-KI and the reception of the sensory-organ is observed the connection of the sensory-organ and it's corresponding wave. The informations recorded in the wave are distinguished patternly. And the several shaping waves transmit the informations each other through the resonnance. The wave theory is explained the LEE(理) as the wave-pattern and the KI(氣) as the revelation of the patterned-wave in the LEE-KI theory(理氣論), moreover the SHIN(神) as the information of the wave-pattern and the KI as the energy of the wave and the JEUNG(精) as the material of the wave in the JEUNG-KI-SHIN theory(精氣神論). In this point, the study on the wave-resonance of bio-KI is thought that it is significantly in the study method for oriental medicine. The sum of the wave makes the moving body and forms the universe. It means that the several wave patterns gather and form new field. The pattern is a kind of the information and the information is not materially. The information of wave-pattern is the arrangement and the combination of the material source.

• The Journal of Korean Physical Therapy
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• 제29권5호
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• pp.265-270
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• 2017

Purpose: This study examined the effects of neck stabilization exercises with vibratory stimulation on the neck disability index and thickness of the deep neck flexor. Methods: Thirty subjects (control group=15, experimental group=15) with mild neck pain were enrolled in the study. The control group underwent craniocervical flexion exercise (control group, CG) and the experimental group was given craniocervical flexion exercise with vibratory stimulus (experimental group, EG) (3 sets, 3 times per week for 6 weeks). To examine the effects of exercise, the subjects were evaluated using the neck disability index (NDI), the thickness of the deep neck flexor muscle, and muscle strength. An independent and paired t-test were used to compare the effects of the exercise between the groups. Results: The NDI score of the two groups increased significantly after 6 weeks of treatment (p<0.001) and there was a significant difference between the EG group at 3 weeks (p<0.05) and 6 weeks (p<0.01). The thickness of the deep neck flexor in the CG group increased significantly after 6 weeks of treatment in all pressure stages (p<0.001). The EG group showed a significant increase after 3 and 6 weeks of treatment in all pressure stage (p<0.001), and 22 mmHg, a significant difference between 3 and 6 weeks (p<0.05) and among 24, 28, and 30 mmHg at 6 weeks (p<0.05). The maximum muscle strength of the deep neck flexion muscles increased significantly in the two groups after 6 weeks of treatment (p<0.001) and there was significant difference between the EG group at 6 weeks (p<0.01). Conclusion: Craniocervical flexion exercise with vibratory stimulus decreases the NDI, and increases the thickness of the deep neck flexor and maximum muscle strength of the deep neck flexion muscles in patients with mild neck pain.

• 감성과학
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• 제13권4호
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• pp.703-710
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• 2010

본 연구에서는 선행 연구에서 개발된 촉각 자극 시스템의 시스템적인 문제, 자극 제어에 관한 문제, 기타 부가적인 문제들을 보완할 수 있는 촉각 자극기를 개발하였다. 개발된 장치는 제어부(control unit), 구동부(drive unit), 진동부(vibrator)의 세부분으로 구성된다. 제어부는 E-Prime 소프트웨어로부터 명령을 전송받고 진동 자극 신호를 발생한다. 구동부는 촉각 자극기가 효과적으로 진동 자극을 발생할 수 있도록 충분한 전류를 공급한다. 진동부는 작은 동전(coin) 형 진동기(vibrator)와 벨크로(velcro)로 구성되며 피험자의 손에 쉽게 고정 할 수 있도록 제작하였다. 개발된 장치는 소형, 경량, 저전력 구동, 간단한 구조, 최대 35개의 자극 채널, 시각 및 청각과의 다양한 자극 조합을 지연시간 없이 제시할 수 있도록 설계 되어 시스템적인 문제들을 보완하였다. 자극의 크기와 시간을 10단계로 조절할 수 있도록 하고, 넓은 동작주파수 범위를 확보하여 자극 제어에 관한 문제들을 보완하였다. 저전압 구동으로 인체에 대한 안정성을 확보하고, 손가락 이외에 신체의 어느 부분이든 자극 제시가 가능하도록 제작하였다. 특히 본 시스템은 인지과학 연구에서 범용으로 사용되는 소프트웨어인 E-Prime을 기반으로 개발되었기 때문에 활용성이 매우 높을 것으로 판단된다.

• 대한통합의학회지
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• 제8권4호
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• pp.223-230
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• 2020

Purpose : The purpose of this study was to examine the effects of tools (i., extracorporeal shock wave therapy, massage gun, and foam roller) on range of motion, muscle tone and pain threshold among patients with hamstring stiffness. Methods : Fourteen participants with hamstrings stiffness were recruited. Interventions were performed 6 times, and each session was for 30 seconds using the three tools. The range of motion, muscle tone, and pain threshold were measured. The order of the use of the three tools was randomly determined. The foam roller was made to move from the bottom of the hip crease to the upper part of the back of the hamstring. Additionally, velocity 5 vibration stimulation was performed on the hamstring using a massage gun. Moreover, vibration stimulation was performed on the hamstring with extracorporeal shock wave therapy 5 minutes, 5 Hz, and 1,500 strokes. The flexibility of the posterior thigh muscle was based on maintaining the knee and hip joints in a 90 ° bend in the supine position. The joint angle of the knee was measured, when the knee was actively extended, at the maximum point where the posterior thigh muscle was stretched. The elasticity of the posterior thigh muscle was measured while the subject was prone and in a relaxed state without any force. Measurements were made at the muscle abdominal area of the semitendinosus muscle of the posterior femur, and the area to be measured was marked with a pen. The measurement of the tenderness threshold of the posterior femur was measured using a tenderness meter(Commander Algometer, J-Tech, USA). The force value at the point at which the pressure sensation change to pain was measured after applying vertical pressure to the posterior femur muscle, which was the halfway point between the ischial tuberosity and the popliteal surface of the subject lying on their stomach. Results : The extracorporeal shock wave therapy increased stiffness and, muscle tone, and caused changes in the pain threshold, whereas the other two tools had no effect on these indices. Conclusion : Extracorporeal shock wave therapy has important effects on range of motion and muscle stiffness and can be used in warmup protocols.

• 고령자･치매작업치료학회지
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• 제12권2호
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• pp.87-95
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• 2018

목적 진동자극기는 타 치료도구에 비하여 임상환경에서 손쉽게 구할 수 있으며, 팔 활성화훈련을 수동적으로 할 수 있다는 것이 장점이다. 다음과 같은 장점에도 불구하고 최근 진동감각에 관련한 연구는 활성화 되지 않고 있는 실정이다. 본 연구는 환측 상지의 손에 제공된 진동감각이 뇌졸중 환자의 편측무시 감소에 미치는 영향을 알아보는 것이다. 연구방법 뇌졸중으로 인한 편측무시 증상을 가진 환자를 대상으로 2018년 10월 19일부터 동년 11월 7일가지 약 3주간 실시하였다. 연구 설계는 개별실험 연구방법(single-subject experimental research design) 중 ABA설계를 사용하였으며, 평일 하루에 한 번 총 18회로 (기초선 과정 4회, 중재 과정 6회, 기초선 회귀 과정 3회)를 실시하였다. 대상자 선정을 위하여 MMES-K를 사용하였으며 편측무시 검사도구로는 선 나누기 검사(Line Bisection test; LBT), 알버트 검사(Albert's test), 별 지우기 검사(Star Cancellation Test: SCT)를 사용하였다. 분석을 위해서 기초선과 중재기의 회기 별 측정값은 그래프를 이용하여 시각적으로 분석하였고, 평균값을 사용하였다. 연구결과 세 가지 평가결과 모두 기초선 기간보다 훈련 기간에 놓친 오류의 개수가 감소하였고, 훈련 후에도이 감소는 유지되었다. 선 나누기 검사에서 평균 $4.5{\pm}1$개 누락에서 평균 $2{\pm}1.2$개 누락 그리고 평균 $0.6{\pm}0.5$개 누락으로 오차가 감소하였다. 알버트 검사 결과, 평균 $22.5{\pm}1.9$개 누락에서 평균 $8{\pm}7.3$개 누락 그리고 평균 $0.3{\pm}0.5$개 누락으로 오차가 감소하였다. 별 지우기 검사에서는 평균 $26{\pm}4.6$개 누락에서 평균 $21.8{\pm}1.7$개 누락 그리고 평균 $20{\pm}0$개 누락으로 오차가 감소하였다. 결론 본 연구에서는 진동감각 자극치료가 편측무시 증상 개선에 지속적인 효과가 있다는 결과를 보였다. 이러한 연구 결과를 바탕으로 추후의 연구에서는 객관성을 높이기 위한 보다 체계적인 연구가 진행되어야 할 것이며 중재효과를 더욱 극대화 시킬 수 있는 다양한 중재법에 대한 추가적인 연구가 필요할 것으로 사료된다.

• 한국항행학회논문지
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• 제25권5호
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• pp.313-319
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• 2021

본 논문에서는 MIL-HDBK-344A 기반의 ESS(environmental stress screening) 시험 에 대해 소개하고, 유도탄 내부 케이블의 ESS 시험에 대한 목적과 규격 설정 및 시험 방안에 대하여 확인하였다. ESS 시험구성은 온도 순환과 랜덤 진동의 환경 자극으로 이루어져 있으며, 핸드북의 절차를 기반으로 유도탄 내부 케이블의 ESS 시험 규격 설정과 시험 구성을 제시하고, 진동 시험을 위한 유도탄 내부 케이블의 ESS 시험을 위한 치구를 제작하였다. 스크린 강도(SS; screening strength)를 통해 결정되는 결함 감지 확률은 일회성으로 사용되는 유도탄의 신뢰성에 부합되도록 선정하였고, 또한 ESS 시험 중 유도탄 내부 케이블의 검사방법과 고려해야 할 점에 대하여 소개하였다.