• Journal of the Korean Arthroscopy Society
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• v.8 no.2
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• pp.115-118
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• 2004

Purpose: The purpose of this study is to measure the internal and external rotation of shoulder and compare with normal volunteer and patients diagnosed as SLAP lesion. Materials and Methods: Thirty-eight cases (group 1) who had SLAP lesions at shoulder arthroscopy and fourty young volunteers(group 2) were analyzed retrogradely with medical record, intra-operative arthroscopic photo & video for SLAP lesions and the ROM of shoulder Under the interscalene anesthesia, the range of motion of internal rotation and external rotation were measured on flxed scapula and 90 degree abduction of shoulder, and the same method for group 2. We analyzed the results with two sample T-test and Wisconsin signed ranks test. Results: There was a significant difference between group 1 and group 2 for the ROM of shoulder. (IR; p<0.001,ER; p<0.001).For the group 1, internal and external rotation with the arm abducted 90 averaged 50 and 64 degrees and for the group 2, internal and external rotation averaged 77 and 90 degrees with significant difference(IR; p<0.001,ER; p<0.001).Conclusion: The range of motion of shoulder, especially internal and external rotation significantly decreased in SLAP lesions. Our results suggest that a limited rotational motion of shoulder closely related with SLAP lesion.

• PNF and Movement
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• v.2 no.1
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• pp.59-69
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• 2004

목적 : 본 연구는 경부의 후인과 회전 운동 범위에 있어 운동 감각 역치의 차이를 비교하기 위해 수행되었다. 방법 : 본 연구의 대상자는 19명(10명 남자, 9명 여자 나이 19~30세 평균 23.2, 표준편차 3.3)이 참가하였다. 이 연구에서 운동 감각 역치는 편안히 앉은 자세에서 시각 차단시와 시각 허용시에, constant stimuli의 방법을 사용하여 반복 측정되었으며, 움직임을 수행 하는 과정에서 정지 상태를 유도하여 그 정지동작에서 두 동작의 차이를 평가하였다. 결과 : 본 연구의 결과 후인 운동 감각이 오른쪽 또는 왼쪽 회전 운동 감각 보다 더 민감하게 나타났다. 결론 : 중간 범위의 두 움직임간의 차이를 비교할 때 시각차단 유무는 각 운동 감각에 영향을 미치지 않았다.

• Korean Journal of Applied Biomechanics
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• v.19 no.3
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• pp.549-555
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• 2009

The purpose of this study was to quantify the isokinetic peak torque and range of motion at the shoulder in 8 national male volleyball players who played during the 2008 professional leagues. In this study the strength and range of motion data in the internal rotation(IR) and external rotation(ER) of shoulder joint were measured with isokinetic measurement system(Biodex Inc) and motion analysis system (Simi motion system Inc.) from 3 volleyball players with atrophy of the infrasupinatus and 5 volleyball players without atrophy of the infraspinatus. Peak torques were determined using isokinetic measurement on the shoulder joint rotator at the point of angular velocities of $60^{\circ}$/s. Significant difference was found in the peak torque, IR / ER ratio and the range of motion through assessment of the dominant shoulder between two groups. we recommended functional exercises that improve both external rotators strength and stretching exercise for internal rotation in the dominant side during the prevention programs in volleyball players.

• Journal of the Korean Chemical Society
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• v.28 no.1
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• pp.34-40
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• 1984

The reorientational motion of $C_6F_6$ in neat liquid is investigated in the temperature range 293∼333K by analyzing ${\nu}_2$ and ${\nu}_16$ bands of its Raman spectrum. Diffusion constants for the tumbling ($D_{\bo}$) and spinning ($D_{\parallel}$) motions are determined. The reorientation of the molecule seems to be distinctly anisotropic. Based on the hydrodynamic model, the tumbling motion of the figure axis of $C_6F_6$ is largely diffusional. On the other hand, the spinning motion of the same axis looks mostly inertial.

• Journal of the Korean Society of Radiology
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• v.12 no.1
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• pp.115-122
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• 2018

The success of the total hip arthroplasty is revealed as initial stability, range of motion, and long term pain, etc. Depending upon choice of implantation options such as femoral neck offset, diameter of the femoral head, the lateral opening tilt. Especially the impingement between femoral head component and acetabular cup limits the range of motion of the hip. In this sense, estimation or evaluation of the range of motion before and after the total hip arthroplasty is important. This study provides the details of a computer simulation technique for the hip range of motion of intact hip as well as arthroplasty. The suggested method defines the hip rotation center and rotation axes for flexion and abduction, respectively. The simulation uses CT-based reconstructed 3D models and an STL treating software. The abduction angle of the hip is defined as the superolateral rotation angle from sagittal plane. The flexion angle of the hip is defined as the superoanterior angle from the coronal plane. The maximum abduction angle is found as the maximum rotation angle by which the femoral head can rotate superolaterally about the anterior-posterior axis without impingement. The maximum flexion angle is found as the maximum rotation angle by which the femoral head can rotate superoanteriorly about the medial-lateral axis without impingement. Compared to the normal hip, the total hip replacement hip showed decreased abduction by 60 degrees and decreased flexion by 4 degrees. This measured value implies that the proposed measurement technique can make surgeons find a modification of increase in the femoral neck offset or femoral head, to secure larger range of motion.

• Journal of the Korea Convergence Society
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• v.12 no.10
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• pp.277-286
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• 2021

This study investigated the effect of a 12-week rehabilitation program on the range of motion (ROM) and muscle strength of high school baseball players with shoulder instability. We allocated 12 players with shoulder instability to the rehabilitation group and 13 players without shoulder instability to the normal exercise group. Covariate analysis (ANCOVA) was performed to assess the ROM of the internal (IR) and external (ER) rotational joints before and after participating in the 12 weeks of rehabilitation, and two-way ANOVA was performed to assess isokinetic muscle strength. The statistical significance level was set at p<.05. The IR ROM of the dominant (D) shoulder with instability and non-dominant (ND) shoulder was significantly increased before and after the rehabilitation program. The total ROM of the D shoulder with instability significantly increased after rehabilitation. IR isokinetic strength significantly improved at an angular velocity of 180°/s after rehabilitation. These results indicate that the rehabilitation program used in this study could be effective in improving ROM and muscle strength in patients with shoulder instability. However, due to the limited results, additional research on the premise of extending the rehabilitation period is necessary.

• The Journal of the Convergence on Culture Technology
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• v.1 no.2
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• pp.77-83
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• 2015

The purpose of this study is to prove the increase of range of motion of shoulder joint in the patients with shoulder adhesive capsulitis by applying the vibratory stimulation. In terms of subjects of the study, the experimental group 15(4 male, 11 female)and the control group 15(5 male, 10 female) were divided. The measurement of the shoulder range of motion was taken by measuring the degrees of flexion, abduction, and external rotation with a goniometer from pre treatment to one to four weeks. The results were as follows : In the experimental group and control group, there was the statistical significance in the range of motion of the shoulder flexion, abduction, and external rotation during four weeks. In summary, the vibratory stimulation are effective interventions for improving shoulder adhesive capsulitis, patient's range of motion of shoulder joint.

• Journal of Convergence for Information Technology
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• v.9 no.12
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• pp.208-215
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• 2019

The purpose of this study was to investigate the effects of deep neck flexion exercise(DNFE) and thoracic range of motion exerecise(TROM) on the pain and forward head position(FHP) in stroke patients. Thirty-six patients were randomly assigned to DNFE group, TROM group, and control group. pre and post intervention, pain(VAS), Craniovertebral angle(CVA), cranial rotation angle(CRA), FHP, and TROM were measured. As a result. The DNFE group and the TROM group showed significant differences in VAS, CVA, CRA, FHP, and TROM pre and post intervention(p <.05), and the two groups showed VAS, CVA, CRA, FHP, and TROM compared to the control group (p <.05). In conclusion, in patients with stroke, DNFE and TROM were effective in restoring FHP and neck pain. We hope that they will be used in the interventional program for stroke patients in clinical practice.

• Journal of the Korean Chemical Society
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• v.26 no.4
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• pp.205-209
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• 1982

Anisotropic rotation of $CDCl_3$ in neat liquid is investigated by the analysis of ${\nu}_1$ band of Raman spectrum and the diffusion constant($D_{\perp}$) for the tumbling motion is obtained. The diffusion constant ($D_{II}$) for the spinning motion is obtained from the above $D_{\perp}$ value and the chlorine-35 nuclear quadrupole relaxation time. The diffusion constants thus obtained seem to agree very well with the ones obtained from $^2H$ and $^35C$l in NQR results within experimental errors. The data suggest fairly anisotropic character of reorientational motions in neat $CDCl_3$.

• Proceedings of the Korea Society for Simulation Conference
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• 2002.05a
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• pp.115-121
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• 2002

PC 및 게임 소프트웨어의 급격한 발달로 가상현실 구현에 필요한 그래픽 환경은 성숙단계에 진입하였다. 현재 국내에서 개발되는 게임 소프트웨어는 PC사용자를 겨냥한 제품이 대부분이다. 토요일 휴무제의 도입에 따른 문화 콘텐츠 시장의 확대, 가족이 즐길 수 있는 테마 공원의 성장성 등을 고려할 때 기존의 PC 게임과 차별화 되는 운동감을 포함한 가상현실 게임 제품의 개발이 요망된다. 잘 알려진 6자유도 운동 시뮬레이션 방식인 Stewart 방식은 구현 가격이 고가이고 운동범위가 작아 게임용으로 상용화하기 어렵다. 본 연구에서는 2대의 AC 서보모터를 이용하여 roll과 pitch의 2자유도만 구현하나, 각 축으로 자유로운 회전이 가능하여 탑승자의 스릴감을 향상시킬 수 있는 저가형 운동의자를 개발하였다. 2 자유도로 회전하는 외부와 차단된 캐빈 내부에는 40인치 스크린과 프로젝터가 설치되어 롤러코스터 게임의 몰입감을 향상시켰다. 롤러코스터 가상현실을 대상으로 운동감을 극대화하기 위한 워시아웃 (washout) 필터의 설계 알고리즘이 제시된다. 탑승자들의 감성 평가를 객관화하기 위한 데이터 베이스 구축방안이 서술된다