• The Journal of Korean Physical Therapy
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• 제12권1호
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• pp.41-47
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• 2000

BACKGROUND AND PURPOSE. The purpose of this study is to investigate the effect of the disturbed vision on the gait distance parameters on the healthy young population. SUBJECTS. Twenty four healthy college aged individuals are randomly assigned to both a condition with a strobe light and the other condition without a strobe light. METHODS. The instrumentation used for gait analysis is the GaitRite electronic walkway system with a personal IBM computer. The examiner naked all the subjects to walk 6 times on the gait mat without the strobe light and. 6 times on the mat with the strobe light. The first 4 trials were practice and the last two trials were recorded in both conditions. The gait parameters analyzed were as follows : velocity, cadence, step length, and heel to heel base of support. RESULTS. Paired samples t-test used for this study did not found any significant differences between the two conditions because the p-values that were analyzed on the experiment were Utter than 0.05. The gait parameters that were analyzed included cadence, velocity, left and right heel to heel base of support, and left and right step length. DISCUSSION AND CONCLUSION. Based on this population, the condition of disturbed vision via the effect of the strobe light was not significantly challenging to compromise the body's sensory systems. However, in the elderly population, these systems can undergo age related changes. Visual changes rapidly decline in people 60 to 80 years of age and changes in the vestibular system include $20-40\%$ reduction in hair cells.

• Annals of Clinical Neurophysiology
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• 제1권2호
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• pp.126-146
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• 1999

In clinical neurology various different electrophysiological tests are widely used to demonstrate the unsuspected malfunctioning in the nervous system and to monitor over time the clinical status of patients. In addition clinical neurologists and neurosurgeons take advantage of the intraoperative monitorings to increase the quality of neurosurgical operations in the posterior fossa, in the spinal cord, or in visual pathways. In the field of movement disorders, elecrophysiolgical tests provide neurologists with making accurate differential diagnoses with useful therapeutic stratergies as well as with investigating the pathophysiological machanisms. By using the electromyographic tests it could be possible for us to evaluate the types of blephalospasm, the extent of hemifacial spasm, the level of myoclonus, and the prime muscles of torticollis etc. Sometimes the myographic guidance may be critical for choosing the exact injecting site of botulinum toxin. These several decades various electroencephalographic and evoked potential tests has been utilized in the electrophysiological laboratories to understand the basic pathophysiology of myoclonus, spasticity and other central motor dysfunctions. It could be one of the breakthroughs in the area of behavorial neurology that the brain function can be mapped by the spontaneous or evoked electrical activities of nervous system since the movement related potentials (MRPs) had been studies for several decades. Various reflex tests such as masseter reflex, blink reflex, click evoked vestibulocollic reflex, facial reflex, stretch reflex, flexor reflex, H-reflex, H-reflex recovery curve, vestibular inhibition of H-reflex, reciprocal inhibition, recurrent or Renshaw reflex, Ib inhibition, cutaneous reflex have been also used to understand normal or abnormal physiology in movement disorders. Polysomnography, posturography and gait studies are also applied in clinical neurology in association with with movement disorders which are useful in deciding the treatment regimen.

• 디지털콘텐츠학회 논문지
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• 제18권2호
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• pp.283-291
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• 2017

가상현실 경험에서 높은 감각적 몰입으로 시각으로 지각되는 정보와 전정기관, 체성감각 등 감각기가 지각하는 정보 간에 불일치가 생기면서 가상현실 멀미가 일어나 기기의 보급에 장애가 되고 있다. 본 연구는 기존의 감각의 충돌 이론에 착안하여 모션 컨트롤러로 대표되는 새로운 전반적인 신체의 움직임이 각성 정도와 현존감에 영향을 끼치며, 가상현실 멀미를 촉발할 수 있고 각성 정도는 감각적 몰입, 현존감과 깊은 관계가 있다는 가설을 세우고 실험을 통해 검증하였다. 특히 컨트롤을 위한 전체적인 신체의 움직임에 집중하여, 몸-머리 움직임과 대조하여 연구하였다. 실험의 결과로 신체 움직임과 각성 정도 간에 유의한 상관관계를 확인할 수 있었고, 현존감에 대해서도 일정 정도 유의한 상관 관계가 있음을 확인할 수 있었다. 또, 신체의 움직임이 있을 때, 안경의 착용 유무가 관측되는 가상현실 멀미에 중재변수로 역할을 하는 것을 확인할 수 있었다.

• 대한감각통합치료학회지
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• 제3권1호
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• pp.1-11
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• 2005

Objective : The purpose of this study was to get the mean of duration of post-rotatory nystagmus test in normal children and to differentiate the duration of post-rotatory nystagmus test between normal children and children with pervasive developmental disorder. Method : 84 subjects were between 3 and 5 years of age and consisted of 64 normal children and 20 children with the pervasive developmental disorder. Analysis of the data was done by using t-test and ANOVA. Results : The results were as follows: 1. Range of duration of post-rotatory nyatagmus test in normal children was $5{\sim}22$second on left and $7{\sim}21$ second on right and the mean was 12.63 second on left and 12.59 second on right. 2. Range of duration of post-rotatory nystagmus test in children with the pervasive developmental disorder was $3{\sim}11$ second on both and the mean was 5.65 second on left and 5.60 second on right. 3. There was no significant difference between males and females with normal children in duration of post-rotatory nystagmus test. However, there was a significant difference of the mean duration between 3 and 5 years old normal group. 4. Children with pervasive developmental disorder significantly have relatively lower duration than the duration of post-rotatory nystagmus test of normal children. Conclusions : The results of the study showed significant difference between normal children and children with pervasive developmental disorder in duration of post-rotatory nystagmus test and suggest that they could be applied to the baseline of clinical therapy.

• 한국전자통신학회논문지
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• 제8권4호
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• pp.619-629
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• 2013

이 연구는 20대 여대생들을 대상으로 세 가지 균형조절 훈련(Aqua, Bio-feedback, Trampolin)이 정적 균형 능력과 시각, 전정각, 고유수용감각 등의 감각요소에 미치는 효과를 비교하기 위해 아쿠아 훈련군(10명), 바이오피드백 훈련군(10명), 트램폴린 훈련군(9명)으로 무작위 할당한 후 각 군별로 주 3회, 회당 30분간의 운동 프로그램을 6주간 진행하면서 3주후, 6주후에 Tetrax portable multiple system을 이용하여 안정성지수를 측정하고, 근전도 중앙주파수값을 이용하여 산출한 근전도 균형점수를 반복측정된 자료의 분산분석 및 Wilcoxon의 부호순위 검정 등을 이용하여 비교 분석한 결과를 종합해 볼 때, 바이오피드백 훈련은 세 가지 감각기능을 고루 향상시키며 아울러 감각기능 간의 협응성 또한 향상시키는 것으로 판단되며, 아쿠아 훈련은 전정기능을 집중적으로 강화시키는 것으로 보인다.

• 한국콘텐츠학회논문지
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• 제14권9호
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• pp.120-130
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• 2014

이 연구는 여성 노인들에게 15주간 라인 댄스 운동 프로그램을 실시하게 한 후 자세 제어와 반응 메커니즘을 관찰할 목적으로 균형성 요인을 분석해 낙상 예방을 위한 운동 중재 효과를 규명하고자 했다. 이를 위해 65세 이상 16명이 선정되었다. 균형성 판단 요인은 정적 직립 상태에서 압력 판에서 25초 서있는 동안 압력 판의 6가지(3방향 힘, 3방향 모멘트) 자료를 수집해 이를 바탕으로 좌우 및 전후 압력중심 변동폭, 이들의 압력 중심 속도, 흔들림 면적을 분석했다. 분석한 결과 라인 댄스 활동 후 전후 압력 중심의 변화 범위(p<.01)와 압력 중심의 평균 속도(p<.05)는 크게 감소를 보였다. 또한 흔들림 면적은 라인댄스 후 유의한 감소를 보였다(p<.001). 좌우 방향의 압력중심 범위와 속도는 큰 감소를 보이지 않았다. 앞으로 이와 유사한 연구를 수행하고자 할 때는 운동 중재 효과를 실제 낙상과 관련해 연구할 필요가 있으며, 또한 균형성 판단 요인을 신체계뿐만 아니라 전정계, 감각계 등을 관찰하는 연구가 필요하리라 본다.

• 한방안이비인후피부과학회지
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• 제18권3호
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• pp.148-157
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• 2005

Damum(痰飮) is a kind of pathologic secretion products that excessive water is accumulated in a part of body. Damhun(痰暈) is the vertigo induved by Damum(痰飮). We experienced two clinical cases treated vertigo by orietal medicine(herbal medication, acupuncture). 33-years old male and 63-years old female patients had Damhun(痰暈), vertigo by Damum(痰飮). We administered Banhabaechulcheoma-tang(Pansiabaichutienma-tang) and Yeonggyechulgam-tang(Lingguishugna-tang) to each Patient, and two Patients improved vertigo and referred symptoms. In other words, this study is that We did not limited peripheral vertigo to vestibular system, made a diagnosis of Damum(痰飮) and treated vertigo by orietal medicine(herbal medication, acupuncture) referred to many medical practitioner of many generations. We suggest that digestive sypmtom(related to Damum(痰飮), abdominal examination and stool frequency are closely associated with vertigo and could be estimated prognosis of vertigo.

• The Journal of Korean Physical Therapy
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• 제35권4호
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• pp.105-110
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• 2023

Purpose: The purpose of this study was to determine whether the degree of dizziness affects static balance due to the disruption or absence of the senses involved in balance. To this end, the correlation between the Dizziness Handicap Inventory (DHI), which objectively evaluates dizziness, the Fourier Index (FI; Frequency bands of postural oscillation, F1, F2-4, F5-6, F7-8) and the Stability Index (ST), which evaluates static balance ability, were examined. Methods: This study investigated balance and dizziness issues in 30 healthy young adults. Participants underwent multiple tests like the DHI and tetra-ataxiometric posturography (Tetrax) under different conditions (eyes open/closed, standing on a foam-rubber pillow, and with the head in various orientations). Results: We found that F1 exhibited a weak positive correlation with dizziness under normal conditions, as well as when the eyes were closed (r=0.396, p<0.05) and the head was tilted back (r=0.375, p<0.05). Meanwhile, F5-6 showed a moderate positive correlation with dizziness in both head-back (HB: r=0.471, p<0.05) and head-forward postures (r=0.404, p<0.05). Lastly, both F7-8 and ST demonstrated a moderate positive correlation with dizziness when the head was in a forward posture (F7-8: r=0.483; ST: r=0.403, p<0.05). Conclusion: The study results indicate that the severity of dizziness affects sensory systems and balance. It also suggests that head movements, especially forward and backward, further stimulate the vestibular system, intensifying dizziness, and balance problems in affected individuals.

• 전자공학회논문지SC
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• 제42권6호
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• pp.57-66
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• 2005

본 연구에서는 가상현실기술과 자전거를 이용하여 평형감각 실조환자의 진단 및 시각, 전정감각, 체성감각 등을 효율적으로 진단하고 자극, 훈련시킬 수 있는 자전거 시뮬레이터 시스템을 개발하였고, 이 시스템이 평형감각 훈련에 대한 효과를 고찰하였다. 실험 방법은 20대의 건강한 젊은 성인과 70대의 노인을 대상으로 자전거 주행 시에 나타나는 주행시간, 주행속도, 중앙선이탈도, 무게이동과 무게중심의 변화를 측정하여 가상 자전거 시스템이 평형감각 훈련에 어떠한 영향을 미치는지에 대한 유용성을 분석 하였다. 실험결과, 20대의 젊은 성인과 70대의 노인이 훈련 후 주행속도와 주행시간 중앙선 이탈도가 감소하였고, 좌우 무게이동과 무게중심 면적이 모두 감소하였으며 시각적 피드백의 효과가 평형감각에 더욱 유용하다는 결론을 얻었고 시각적 피드백의 효과를 이용하여 복합 감성정보를 활용한 헬스기구나 평형감각 재활 훈련에 활용할 수 있음을 알 수 있었다.

• 대한인간공학회지
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• 제33권1호
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• pp.39-48
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• 2014

Objective: This entire study has two parts. Study I aimed to develop a psychological assessment scale and the study II aimed to investigate the effects of LFN (low frequency noise) on the psychological responses in humans, using the scale developed in the study I. Background: LFN is known to have a negative impact on the functioning of humans. The negative impact of LFN can be categorized into two major areas of functioning of humans, physiological and psychological areas of functioning. The physiological impact can cause abnormalities in threshold, balancing and/or vestibular system, cardiovascular system and, hormone changes. Psychological functioning includes cognition, communication, mental health, and annoyance. Method: 182 college students participated in the study I in development of a psychological assessment scale and 42 paid volunteers participated in the study II to measure psychological responses. The LFN stimuli consisted of 12 different pure tones and 12 different 1 octave-band white noises and each stimulus had 4 different frequencies and 3 different sounds pressure levels. Results: We developed the psychological assessment scale consisting of 17 items with 3 dimensions of psychological responses (i.e., perceived physical, perceived physiological, and emotional responses). The main findings of LFN on the responses were as follows: 1. Perceived psychological responses showed a linear relation with SPL (sound pressure level), that is the higher the SPL is, the higher the negative psychological responses were. 2. Psychological responses showed quadric relations with SPL in general. 3. More negative responses at 31.5Hz LFN than those of 63 and 125Hz were reported, which is deemed to be caused by perceived vibration by 31.5Hz. 'Perceived vibration' at 31.5Hz than those of other frequencies of LFN is deemed to have amplified the negative psychological response. Consequently there found different effects of low frequency noise with different frequencies and intensity (SPL) on multiple psychological responses. Conclusion: Three dimensions of psychological responses drawn in regard to this study differed from others in the frequencies and SLP of LFN. Negative psychological responses are deemed to be differently affected by the frequency, SPL of the LFN and 'feel vibration' induced by the LFN. Application: The psychological scale from our study can be applied in quantitative psychological measurement of LFN at home or industrial environment. In addition, it can also help design systems to block LFN to provide optimal conditions if used the study outcome, .i.e., the relations between physical and psychological responses of LFN.