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Tadashi Yasuda,Keiichi Oyanagi,Miyu Nakagaki,Hiromitsu Itoh 대한운동학회 2020 아시아 운동학 학술지 Vol.22 No.4
[OBJECTIVES] Dynamic knee valgus is composed of hip-knee coupling. While females differ from males in passive hip motion, hip rotation range may alter muscle mechanics and neuromuscular activity. This study aimed to compare knee abduction biomechanics during double-legged drop-landing between males and females with different hip rotation ranges. [METHODS] This study included five females with the range of hip internal rotation (IR) > the range of hip external rotation (ER), five females with ER>IR, four males with IR>ER, and five males with ER>IR. There was no difference in other hip motions among them or no difference in hip muscle strength between the same sex groups. Three-dimensional motion analyses of the hip and knee joints were performed during double-legged drop-landing. [RESULTS] Multiple regression analysis of females with IR>ER showed that peak knee abduction moment (KAM) was associated with maximal hip abduction moment before detecting peak KAM whereas peak knee abduction angle (KAA) correlated with no variable. In females with ER>IR, peak KAM was associated with maximal hip ER moment before detecting peak KAM, hip ER muscle strength and hip adduction range while peak KAA correlated with peak hip abduction moment before detecting peak KAM. In males with IR>ER, peak KAM was associated with hip ER range and hip adductor strength whereas peak KAA correlated with maximal hip ER moment and maximal hip IR angle during landing. In males with ER>IR, peak KAM was associated with hip extensor strength, hip abduction range and hip flexion range whereas peak KAA correlated with hip ER moment before detecting peak KAM, hip ER muscle strength, and hip adduction range. [CONCLUSIONS] Hip rotation range may differentially affect hip-knee coupling strategy for knee abduction control during double-legged drop-landing between males and females.
STUDY ON THE DEVELOPMENT OF A SUPPORT SYSTEM FOR THE DIAGNOSIS OF APHASIA
Misu, Tadashi,Yasuda, Kiyoshi,Dohi, Takeyoshi 대한전자공학회 1992 HICEC:Harbin International Conference on Electroni Vol.1 No.1
There are many methods for the diagnosis of aphasia. We selected the necessary methods used for effective training by speech therapists. The data includes profile, summary, medical information, details of language impairment, and 8 kinds of tests. The system was upgraded to input-output the data effectively and the data base was structured hierarchically. The most important test in Japan is the Standard Language Test of Aphasia for speech therapist. The support system for SLTA and the training system was developed by a similar method. The system guides the examiner, records the data, measures the time of the test, evaluates the data, and control the test. At present, The support system has been evaluated and improved, and works effectively.
Shintaro Honda,Satoshi Ota,Shinnosuke Yamashita,Tadashi Yasuda 대한골다공증학회 2022 Osteoporosis and Sarcopenia Vol.8 No.1
Objectives: Fragility fractures of the pelvis (FFP) commonly occur in the frail elderly. Displacement in the posterior pelvic ring is recognized as the key sign of instability. This study aims to elucidate the relationship between computer tomography (CT)-based frailty markers and displacement of the posterior pelvic ring within 7 days after injury. Methods: This retrospective study included 49 patients (42 females, 7 males) with FFP (type I 10, type II 24, type III 12, type IV 3). On a CT slice at the level of the third lumbar vertebra, skeletal muscle area, skeletal muscle radiation attenuation, and skeletal muscle index (SMI) were calculated as sarcopenia markers. Osteopenia was measured with trabecular region of interest attenuation technique on the same CT slice. Results: There was no difference in the demographics between non-displaced and displaced FFP. CT-based data showed that patients with FFP had osteopenia. However, no difference was found between non-displaced and displaced FFP. SMI was higher in FFP types III/IV than non-displaced FFP when CT-based data on sarcopenia were compared among all patients. Female patients with FFP demonstrated similar results. Logistic regression analysis using the demographics and CT-based markers on sarcopenia and osteopenia revealed that SMI was a potential determinant of displacement of the posterior pelvic ring fractures. Conclusions: There was inverse association between sarcopenia and displacement of the posterior pelvic ring in the early phase of FFP. Relatively preserved muscle may develop displacement in the elderly with osteopenia.
( Daisuke Takamura ),( Kentaro Iwata ),( Tatsuya Sueyoshi ),( Tadashi Yasuda ),( Hideki Moriyama ) 대한슬관절학회 2021 대한슬관절학회지 Vol.33 No.-
Background: Physical activity is associated with physical function; however, the relationship between early physical activity after total knee arthroplasty (TKA) and postoperative physical function remains unclear. The purpose of this study was to evaluate the association of early physical activity after TKA with postoperative physical function. Methods: Timed Up and Go test (TUG) of 47 patients was assessed preoperatively and at 10 days, 3 months, and 6 months postoperatively. Physical activity from the second to the ninth day after TKA was measured with accelerometer, and the correlation with pre- and postoperative physical function was evaluated . A multiple linear regression was used to predict TUG at 6 months after TKA. Results: Postoperative physical activity correlated with preoperative TUG (ρ = -0.485, p < 0.001), TUG at 10 days (ρ = -0.675, p < 0.001), 3 months (ρ = -0.441, p < 0.01), and 6 months (ρ = -0.368, p < 0.05) after surgery. Multiple linear regression indicated that only the preoperative TUG was associated with TUG at 6 months. Postoperative physical activity was not an independent factor predicting TUG at 6 months after TKA. Conclusion: Our study demonstrated that patients with better physical function have higher physical activity in the early postoperative period, whereas it does not affect physical function at 6 months after TKA. In the early postoperative period, increasing physical activity may not always be necessary to improve postoperative physical function. We also confirmed that preoperative physical function affects postoperative physical function. These findings may be beneficial in improving rehabilitation programs in the early postoperative period.