발목 관절 가동범위 측정을 위한 측정도구의 신뢰도 연구

홍완성,김기원 대한정형도수물리치료학회 2009 대한정형도수물리치료학회지 Vol.15 No.1

Assessment of Isometric Muscle Strength of Shoulder Girdle: A Reliability Study

홍완성,김기원,Hong, Wan-Sung,Kim, Gi-Won The Korean Society of Physical Therapy 2007 대한물리치료학회지 Vol.19 No.6

Purpose: To evaluate the quantitative isometric muscle strength of shoulder girdle and the test reliability using by the equipment, named 'IsoTrack', selected by authors in the former studies. Methods: Thirty healthy subjects (9 men, 21 women) were recruited in two sessions, one for intratester and intertester reliability tests and the other quantitative isometric muscle strength tests. The neck flexion, extension and scapular elevation muscle strength was measured using a force measuring device as IsoTract. Results: Intraclass correlation coefficients for intratester reliability of the all subjects ranging between 0.96 and 0.97. For intertester reliability, the ICC and Pearson correlation correspond to 0.84 and 0.78. We gauged muscle strength of shoulder girdle muscles based on it and indicated quantified isometric muscle strength of women and men in left and right side. Conclusion: We concluded that there were high reiliability of isometric muscle strength of neck and shoulder girdle. Also, we gauged muscle strength of shoulder girdle muscles based on it and indicated quantified isometric muscle strength in left and right side in women and men. So this findings may assist in the measure of whole body muscle strength.

정상 보행의 속도와 경사에 따른 족저압 분포의 특성

홍완성,김기원,Hong, Wan-Sung,Kim, Gi-Won 대한물리치료과학회 2004 대한물리치료과학회지 Vol.11 No.4

Measurements of plantar pressure provide an indication of foot and ankle function during gait and other functional activities because the foot and ankle provide necessary support and flexibility for weight bearing and weight shifting while people are performing these activities. Plantar pressure is being increasingly used in both research and clinical practice to measure the effects of various footwear and physical therapy intervention. The influence of walking speed and ground inclination on plantar pressure parameters However has not been evaluated in detail. So, in this study to determine the effect of changes in walking speed and ground inclination on plantar pressure treadmills with different walking speeds and inclination were used. Plantar pressure parameters were measured with the Parotec system using the walking and running in 20 healthy participants(10 male, 10 female) aged $20{\sim}28$(mean 22.22, S.D.2.26 years) when slow walking and running. The result of this study with increased die walking speed, the peak pressure of 1st, 5th metatarsal head and total contact time and impulse total at the forefoot was affected by walking speed; however, die peak pressure, contact time and impulse total at the forefoot was not affected by ground inclination.

근전도를 이용한 하퇴삼두근의 근피로 분석

홍완성,김기원,김병곤,오정림,Hong Wan-Sung,Kim Gi-Won,Kim Byung-Kon,Oh Joung-Lim 대한물리치료학회 2002 대한물리치료학회지 Vol.14 No.4

The fatigue process of the triceps surae was evaluated during a standing heel-rise test, comparising of pre-fatigue and post-fatigue. Sixteen healthy subjects with a mean age of 22.88 years participated. The heel-rise test was performed until exhaustion, and electromyographic activity expressed as mean value and root mean square of the gastrocnemius and soleus muscles were calculated. The average number of heel-rise performed was 63.69$\pm$26.10. The result of this present study indicate that the EMG signal is sensitive to the different muscle fatigue. Mean value and RMS decreased significantly in after fatigue. Significant difference were found between the pre-fatigue and post-fatigue in the total subjects. But there were no significant changes in mean and RMS between the male and female during standing heel-rise test. The present results, showing decreased EMG signal in the triceps surae, could be used as reference when testing the fatigue process in different clinical conditions. Recommendations for standardization of a heel-rise test are given.

신경근 전기자극으로 유발된 대퇴사두근의 피로도

홍완성,김기원 동남보건대학 2003 論文集-東南保健大學 Vol.21 No.2

Fatigue is a common experience in our daily lives and in many clinical settings, but the processes involved are yet to be understood. Muscle fatigue can be defined as a decrease in the force-generating ability of a muscle, which results from recent activity. The purpose of this study was to examine the stimulation variables which should be considered when neuromuscular electrical stimulation (NMES) is applied to a muscle which is under the normal innervation to minimize muscle fatigue and to increase force-generating ability. A total of 11 healthy men participated in the study and electromyogram (EMG) was recorded when the subjects performed voluntary isometric contraction for 30 seconds after knee extension. And then the subjects performed a fatigue task, consisting of 10 times of isometric contraction sustained by NMES. NMES using Russian current stimulation was applied to muscle fatigue and divided into three sessions by pulse duration(10pps, 30pps, 90pps). The EMG was recorded using MP100 system from quadriceps femoris muscle in four groups. The median power frequency (MdF) and mean power frequency (MF) of EMG signals obtained from the vastus medialis, inner part of rectus femoris, outer part of rectus femoris and vastus lateralis were calculated by fast fourier transformation (FFT), right after each voluntary isometric contraction. The result of this study was as follows : The muscle fatigue of pre and post NMES significantly decreased in delta MdF and delta MF of 10, 90pps pulse duration(p<.05), but no significant decrease was shown in delta MdF and delta MF of 30pps(p>.05).

발목관절 복합체의 가동범위 측정을 위한 중립위치와 측정방법의 신뢰도

홍완성,김기원,Hong, Wan-Sung,Kim, Gi-Won 대한물리치료학회 2011 대한물리치료학회지 Vol.23 No.4

Purpose: To determine the correct measurement methods of the ankle joint complex range of motion for measuring the neutral position and evaluate the rater reliability. In addition, the impact of training on the rater reliability was also assessed. Methods: The subjects were eleven healthy women, who were evaluated by two physical therapists and one physical therapist recorded the results of the study. Standard goniometer was used as the measurement tool. The ankle and subtalar joint neutral position and the active range of motion of the ankle and subtalar joint were measured. Intra-rater reliability and inter-rater reliability measures were analyzed with intraclass correlation coefficients. Results: Intra-rater reliability and inter-rater reliability ranged from high to medium for the neutral position of the ankle joint complex. Intra-rater reliability for dorsiflexion and plantarflexion measurements was medium, while the inter-rater reliability was high. The range of motion of the subtalar joint was measured, and the intra-rater reliability and inter-rater reliability were low and medium, respectively Also, the intra-rater reliability was increased with formal training of the measurement techniques. Intra-rater reliability was reduced in case the raters had not undertaken the training. Conclusion: In summary, the results obtained with the measurement tools and joint measurement of position, indicate the consistency of repeated measurements made by the same observers. Under the same circumstances along with repetition of the same measurement technique during training caused an increase in the rater reliability of formally trained raters.

흡연자의 폐활량에 관한 조사

홍완성,김기원,Hong, Wan-Sung,Kim, Gi-Won 대한물리치료학회 2001 대한물리치료학회지 Vol.13 No.2

It is well known that there is an adverse effect of long-term cigarette smoking on pulmonary function. Therefor we attempted to consider the vital capacity for position changes in a smokers and non-smokers. The pulmonary functions on sitting and supine positions were measured in 28 young healthy students fer the change of vital capacity. Forced expiratory flow-volume curve were performed sitting position and supine position and smoking. The results were summarized as follows; 1) The spirometric values(VC, FVC, FEV$_{1}$) were progressively decreased from sitting position to 30minutes after supine position in a non-smoking group(p<.05). 2) The VC, FVC. FEV$_{1}$, FEF25 ${\sim}$ 75% were decreased from sitting position to 30minutes after supine position in a smoking group(p< .01). The PEF and FEF25% were decreased from supine position to after smoking(p< .05). 3) non-smoking group and smoking group not showed significant change(p> .05). But the spirometric values were more decreased nonsmokers than smokers.

IsoTrack을 이용한 등척성 근력 평가

홍완성,김기원,Hong, Wan-Sung,Kim, Gi-Won 대한물리치료학회 2006 대한물리치료학회지 Vol.18 No.6

Purpose: To measure the cervical isometric force generation capacity of men and women, IsoTract was used. Also the aim of this study was to compare manual muscle testing with isometric muscle strength in women. Methods: Forty seven healthy subjects(25 men, 22 women; age range, 18-29) were recruited in two sessions, one for flexion and the other extension. The cervical strength was measured using a force measuring device as IsoTract. Results: Cervical isometric strength was found to be measure for flexion(27.78 Ibs maximum and 24.52 Ibs average) and extension(33.22 Ibs maximum and 29.90 Ibs average) in mans. And isometic muscle strength for women exerted significantly higher in the grade 4 over than in the grade 3 in women. Conclusion: We concluded that there were difference in isometric muscle strength for the grade of manual muscle testing. So this findings may assist in the measure of whole body muscle strength.

풍화작용에 의한 정상모발의 형태학적 변화

홍완성,장병수,임도선,박상옥,여성문 韓國電子顯微鏡學會 2000 Applied microscopy Vol.30 No.1

성인 남성의 모발에서 정상 모간과 자연상태에서 손상된 모간의 외부형태와 미세구조적 변화를 광학현미경과 주사 및 투과전자현미경으로 관찰하였다. 정상 모간은 모소피층, 모피질, 모수질 등의 3부분으로 구성되어 있었다. 모소피층은 5-7개의 모소피세포들이 중첩되어 모피질과 모수질을 둘러싸고 있고, 길게 신장되어 모피질을 둘러싸고 있는 소피세포의 두께는 약 0.4㎛로 확인되었다. 또한, 이들 세포사이에는 약 25㎛의 세포사이 막복합체가 관찰되었다. 모피질은 잘 발달되어 각질화세포(cornified cell)들로 치밀하게 채워져 있었고, 각질화세포는 직경 약 0.5-0.8㎛인 구형 또는 타원형외 macrofibril로 구성되어 있었으며, 이들은 약 8nm 두께의 가는 microfibri이 동심원상의 규칙적인 형태로 배열되어 있었다. 그리고 macrofibril 사이에는 약 0.5㎛크기의 직경을 가진 구형의 melanin과립들이 고르게 산재되어 관찰되었다. 모수질은 공기가 채워져 있었고, 직경이 약 16㎛의 구형의 형태로 모간의 전체 직경에 1/5 정도를 차지하고 있었다. 풍화에 의해 손상된 모간은 모소피층이 박리되어 있었으며, 모피질세포의 세포질도 손상되어 melanin과립들이 표면에 노출되어 있는 것이 확인되었다. 조직표본상에서 모소피층의 박리과정은 모소피 사이에 공포가 형성되고, 이어서 모소피의 가장자리가 떨어져 나가고, 박리되지 않은 부위는 절단되었다. 모소피가 탈락되어 모피질이 노출된 부위에서는 각질화세포내에 존재하는 macrofibri이 각각 분리되고, 인접원 macrofibril 사이에 공기가 채워지게 되어 오간의 풍화과정은 더욱 촉진되었다. 그리고 노출된 macrofibril 사이에서 탈락 직전의 melanin 과립들이 산재되어 관찰되었다. The morphological changes in normal and weathering hair shafts of the human scalp were investigated by using the transmission and scanning electron microscopes. The hair shaft composed of cuticular layer, cortex and medulla. The surface of normal hairs are smooth and covered by imbricated cuticular scales. The cuticular layer consists of five to seven cuticle cells. These cells, which are flat and thin, measuring about 100 ㎛ long and 0.4 ㎛ thick, appears intercellular membrane complex in diameter 25 nm. The cortex composed of melanin granules and cornified cells, which multicomponent concentric microfibrils in diameter about 8 nm give rise to macrofibrils in diameter 0.5 ㎛ to 0.8 ㎛ encased in limiting membrane. The melanin granules are spherical shaped about 0.5 ㎛ in size and scattered between macrofibrils. The medulla in the normal hairs are 16 ㎛ in diameter centrally region of cortex. Normal hair shafts undergo progressive degenerative changes due to a variety of environmental insults. In the initial weathering process of hair, the cuticular scales became irregularly raised and broken, and then cuticle cells formed cytoplasmic vacuolation, following dissociated intercellular membrane complex, ultimately entirely lost and nuded cortex. Occasionally, transverse fissures were seen at hair shafts indicating that the hairs were deteriorated Complete removal of the cuticular layer in the heavily damaged cortex portions appeared splitting of the cortical cell into its macrofibrils and scattering of melanin granules.

65세 이상 건강한 노인의 보행분석

홍완성,김기원,Hong Wan-Sung,Kim Gi-Won 대한물리치료학회 2002 대한물리치료학회지 Vol.14 No.4

The purpose of this study was to describe the gait pattern and parameters of the healthy elderly over 65years of age by the GATERite system. The subjects were sorted into two groups, depending on their sex: male and female. And female subjects were sorted into three groups, depending on their age. From time parameters and space parameters of gait cycle, between groups, the following results were made. The time parameters such as cadence, velocity, step time, single support and double support were the less the male than the female. And the higher age, the lower value except 80 age group, while no statistically significant. The space parameters(step length and stride length) were the longer the male than the female, and the higher age, the lower value while no statistically signigicant. The functional ambulation profile was high correlation with time and space parameters statistically significant.