• 한국정밀공학회:학술대회논문집
• /
• 한국정밀공학회 2004년도 추계학술대회 논문집
• /
• pp.1232-1235
• /
• 2004

The purpose of this study is to design electrical stimulation system for pharyngeal dysfunction(dysphagia) in stroke patients. Pharyngeal muscle group activity is important, because contracting muscles provide the driving force at the initiation of the swallow and generate the pressure gradients necessary for bolus movement into the esophagus. Although we have many treatment methods for dysphagia, electrical stimulation system will be useful for stroke patients having dysphagia. Electrical stimulation can be divided into the body stimulation and electrodes. The body stimulation is divided again into frequency counter, time control and current measurement part. These parts are to control the current intensity, frequency and stimulating time. And they can be variable according to the patient's clinical assessment. The electrode plays a role to deliver the current from the system to the muscle. Also the position of the electrode can be variable according to the treatment method. We performed the clinical experiment with the stroke patient who has swallowing disorder. The videofluoroscopy was used for the observation. From the result of clinical experiment based on electrical stimulation, we expected that the dysfunction(in pharynx) level of the patient can be improved. However we could not have enough effectiveness of the treatment because of the number of patients, patient's adaptation and treatment period. We will design the optimized electrical stimulation system based on enough clinical experiment in the future.

• Journal of mucopolysaccharidosis and rare diseases
• /
• 제1권2호
• /
• pp.35-39
• /
• 2015

Sleep problems occur frequently among patients with Prader-Willi syndrome (PWS). The most common problem is excessive daytime sleepiness (EDS) that are closely related to of sleep-related breathing disorder (SRBD) such as obstructive sleep apnea (OSA) and congenital hypoventilation syndrome. Obesity, craniofacial dysmorphism and muscular hypotonia of patients with PWS may increase the risk of SRBD. Sleep apneas can interrupt the continuity of sleep, and these disruptions result in a decrease in both the quality and quantity of sleep. In addition to SRBD, other sleep disorders have been reported, such as hypersomnia, a primary abnormality of the rapid eye movement (REM) sleep and narcolepsy traits at sleep onset REM sleep. Patients with PWS have intrinsic abnormalities of sleep-wake cycles due to hypothalamic dysfunction. The treatment of EDS and other sleep disorders in PWS are similar to standard treatments. Correction of sleep hygiene such as sufficient amount of sleep, maintenance of regular sleep-wake rhythm, and planned naps are important. After comprehensive evaluation of sleep disturbances, CPAP or surgery should be recommended for treatment of SRBD. Remaining EDS or narcolepsy-like syndrome are controlled by stimulant medication. Bright light therapy might be beneficial for disturbed circadian sleep-wake rhythm caused by hypothalamic dysfunction.

• Journal of Oral Medicine and Pain
• /
• 제9권1호
• /
• pp.51-64
• /
• 1984

In order to obtain the basic data of movements of the mandible for diagnosis and prgnosis determination of the TMJ dysfunction, the author measured the ranges and shapes of movements of the mandibule in the frontal, sagittal and horizontal trajectory with Saphon Visi-Trainer C-Ⅱ(Tokyo Shizaisha Inc.) in 61 men. The subjects who were undergraduate and graduate students of the School of Dentistry, Seoul Nationa University(SNU) had no pain or symptoms of dysfunction of the masticatory system. The obtained results were as follows: 1. The mean for maximal right and left laterotrusion in the frontal trajectory were 11.3 mm and 10.9mm, respectively and didn't differ significantly. Right and left larero-opening at 15mm, 25mm and 35mm mouth opening respectively didn't differ significantly. Area of border movement of the mandible was 770.33㎟. 2. The mean for maximal protrusion in the sagital trajectory was 10.2mm, antero-posterior deviation between ICP and RCP 1.2mm and angel of maximal protrusion and horizontal plane 20.5。. 3. The mean for right and left laterotrusion is 11.1mm &11.2mm,respectively, and didn't diffef significantly.

• 산업융합연구
• /
• 제19권3호
• /
• pp.83-90
• /
• 2021

본 연구는 어깨뼈 기능이상이 있는 사무직원에 대해 어깨뼈 안정화 운동과 등뼈관절가동술을 시행한 후 어깨뼈의 위치와 움직임 및 어깨기능장애지수에 미치는 영향을 분석하기 위한 목적으로 실행되었다. 연구 대상자는 충남의 N대학에서 근무하는 사무직원 중에서 어깨뼈 기능이상 검사(Scapular Dyskinesis Test, SDT)를 하여 이에 해당되는 42명을 연구 대상자로, A그룹은 어깨뼈 안정화운동 적용군(N=14), B그룹은 등뼈관절가동술 적용군(N=14), 그리고 C그룹은 어깨뼈 안정화운동과 등뼈관절가동술을 결합한 실험군(N=14)으로 나누었다. 각 중재는 4주간 주 3회, 회당 25분씩 총 12회 실시하였다. 연구 결과, 어깨뼈 위치 변화의 그룹 간 비교에서는 C그룹이 다른 그룹에 비해 유의한 차이가 있었다(p<.05). 어깨뼈 움직임의 변화에서 위팔뼈 벌림 45°에서는 C그룹이 다른 그룹과 비교하여 그룹 내 및 그룹 간 비교에서 유의한 차이를 보였다(p<.001). 벌림 90°에서도 C그룹이 그룹 내 및 그룹 간 비교에서 유의한 차이를 보였다. 어깨기능장애지수(Shoulder pain and disability index, SPADI)에서는 C그룹이 다른 그룹에 비해 유의한 차이를 보였다(p<.05). 본 연구의 결과, 어꺠뼈 안정화운동과 등뼈관절가동술의 결합은 어깨뼈 기능이상이 있는 사무직원의 어깨뼈 위치와 움직임 그리고, 상지기능장애지수의 향상에 유의한 효과가 있었다.

• Annals of Clinical Neurophysiology
• /
• 제8권2호
• /
• pp.135-145
• /
• 2006

Background: Parkinson's disease is movement disorder due to dopaminergic deficiency. It has been noted that cognitive dysfunction also presented on Parkinson's disease patients. But, it is not clear whether such a cognitive dysfunction was a dopaminergic dysfunction or cholinergic dysfunction. Using linear and non-linear analyses, we analysed the effect of cognitive and motor symptom on EEG change. Methods: EEGs were recorded from patients with Parkinson's disease and essential tremor, and normal controls during rest. We calculated the power spectrum, correlation dimension and Lyapunov exponent by using 'Complexity'program. The power spectrum, correlation dimension, and Lyapunov exponent were compared between Parkinson's disease patients and essential tremor patients. Results: Theta power was increased in Parkinson's disease patient group. Correlation dimension was increased in Parkinson's disease patients. Positive correlation was noted between MMSE and correlation dimension, and negative correlation was noted between MMSE and Lyapunov exponent. Lyapunov exponent was decreased in Parkinson's disease patient. Conclusions: We conclude that the state of Parkinson's disease patient is characterized by increased correlation dimension and decreased Lyapunov exponent.

• 대한의용생체공학회:의공학회지
• /
• 제24권6호
• /
• pp.515-522
• /
• 2003

인두는 구강과 식도, 비강과 폐의 중간에서 능동적으로 구강을 통해 섭취되는 음식물과 비강을 통해 흡입되는 공기의 통로역할을 하는 주요한 기관이다. 본 연구는 유한요소기법을 이용한 인두의 3차원 구조의 재구성 과정을 거쳐 인두의 생체역학모델을 구현하였으며, 연하곤란환자의 인두근육의 주요부분에 대한 구조적 변형특성을 3가지로 분류하여 유한요소기법을 이용하여 인두내의 압력에 대한 형상의 변형을 관찰 후 최적화 과정을 거쳐 각 부분에서의 추정 압력 구배를 측정하여 연하과정에서 내부에 생성되는 압력의 연속적인 압력분포를 추정하였다. CT에 의한 인두의 변형 형상을 추정하여 임의 압력에 의한 인두구조의 변형 형상을 유한요소 해석에 의해 계산한 후 비교하여 실제 인두강 내에 형성되는 압력을 추정하였다. 재료적 특성은 인두의 기능이상 시 근조직경화가 발생, 즉 stiffness 가 증가하는 것으로 가정하여 응력-변형률 관계에 있어서 각각 $25\%,\;50\%,\;75\%$씩 증가시켜 분석하였다. 이러한 인두의 생체역학모델은 인두기능장애를 가진 환자의 치료 계획 수립에 도움이 되는 유용한 자료를 제공 할 것으로 생각된다.

• Journal of Oral Medicine and Pain
• /
• 제14권1호
• /
• pp.89-103
• /
• 1989

In order to evaluate the influences of Myo-monitoring on masticatory muscles, Myo-monitoring on 31 normal persons and 30 persons with one more temporomandibular dysfunction symptoms during 45 minutes or above. The author observed velocities of mandibular opening and closing movement, variabilities of mandibular rest position and EMG activities of temporal and masseter muscles. The obtained results were as follows : 1. There were no significant differences on velocities of mandibular opening and closing movement between before and after Myo-monitoring. 2. There were significant differences on vertical dimension and total dimension form mandibular rest position to centric occlusion between before and after Myo-monitoring but no significant differences on anteroposterior and lateral dimension. 3. Activities of temporal and masseter muscles were decreased in Myo-Monitoring. 4. There were disappeared significant differences on EMG activity values between normal and symptom groups after myo-monitoring.

• 대한정형도수물리치료학회지
• /
• 제4권1호
• /
• pp.7-20
• /
• 1998

Activity of the trunk muscles is essential for maintaining stability of the lumbar spine because of the unstable structure of that portion of the spine. The central nervous system deals with stabilization of the spine by contraction of the abdominal and multifidus muscles in anticipations of reactive forces produced by limb movement. Recent evidence indicates that the lumbar multifidus muscle and transversus abdominis muscle may be involved in controlling spinal stability. Stabilization training in neutral spine is an integrated approach of education in proper posture and body mechanics along with exercise to improve strength, flexibility, muscular and cardiovascular endurance, and coordination of movement.

• 구강회복응용과학지
• /
• 제22권4호
• /
• pp.289-300
• /
• 2006

This study was performed to investigate the influence of orthognathic surgery on the temporomandibular dysfunction in skeletal class III malocclusion. The temporomandibular joint status in 22 patients(mean age: 23.7 years) who received orthognathic surgery such as mandibular BSSRO(14 patients), maxillary Le Fort I osteotomy with mandibular BSSRO(8 patients) was evaluated by craniomandibular index. All these patients received orthognathic surgery at least 6 months ago. The mean score and standard deviation was obtained and compared with that of 22 normal individuals(mean age: 24.8years) by Student's t-test. In mandibular movement, the score of orthognathic surgery group was higher than that of the normal group. All the items except mandibular movement did not show any differences between the two groups.

• 대한치과보철학회지
• /
• 제29권3호
• /
• pp.43-53
• /
• 1991

It is important to harmonize the occlusion with TMJ and neuromuscular system. However, clinically, how to harmonize is very difficult. The mandibular movement is the motion in which all component part of stomatognathic system participate. This study was performed to compare mandibular movement of mandibular prognathic patients group with that of normal group, to ascertain which components of mandibular movement have differences between two groups, and to use for occlusal treatment of mandibular movement. Thirteen adult who have physiologically normal occlusion and are free of TMJ dysfunction were selected as a control group(Group 1). Eight adult who are mandibular prognathic patient and have more than four anterior teeth crossbite, therefore have not anterior guidance function and have posterior interference at protrusion were selected as a experimental group(Group 2). Electronic pantograph, Denar Pantronic (Denar Corp., U.SA.), was used to record mandibular movement. Pantronic survey was performed by using an arbitrary hinge axis according to manufacturer's direction. Of the Pantronic recordings, immediate side shift (ISS), progressive side shift (PSS), orbiting condylar path (ORB), protrusive condylar path (PRO) between two groups were compared and analysed. The results were as follows: 1. The average protrusive and orbiting condylar inclination of mandibular prognathic patient$(28.44^{\circ},\;36.94^{\circ})$ was significantly lower than those of normal group$(40.15^{\circ},\;48.00^{\circ})$ (P<0.01). 2. There was no statistically significant difference between .the average immediate and progressive side shift of mandibular prognathic patient $(0.37mm,\;6.19^{\circ})$ and those of normal group$(0.52mm.\;5.96^{\circ})$ (P>0.01). 3. The significant correlation was found between orbiting condylar inclination and protrusive condylar inclination.