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Yamagata-shi, Japan

Yamagata Prefectural University of Health science is a public university in Yamagata, Yamagata, Japan. The predecessor of the school was founded in 1997, and it was chartered as a university in 2000. Wikipedia.

Nankaku M.,Kyoto University | Akiyama H.,Kyoto University | Kanzaki H.,Yamagata Prefectural University of Health Sciences | Kakinoki R.,Kyoto University
HIP International | Year: 2012

Purpose: The purpose of this study was to identify factors related to walking efficiency in the early postoperative period of total hip arthroplasty (THA). Methods: The subjects of this study were 18 women who had undergone unilateral THA 4 weeks before and 18 healthy women as control. Using a force plate and a 3-D motion analyser, we mea- sured: 1) gait speed, stride length, cadence; 2) centre of mass displacement in the three directions; 3) asymmetry of the centre of mass movement in vertical direction; and 4) the total internal work per unit mass and distance walked (a negative index of walking efficiency). Results: Compared with healthy persons, THA patients showed significantly greater total internal work per unit mass and distance walked. The vertical centre of mass motion of the THA patients demon- strated an asymmetrical pattern. In THA patients, the stepwise multiple regression analysis selected the displacement and the asymmetrical vertical motion of centre of mass as the sole significant vari- able affecting walking efficiency (R2 = 0.81). Conclusions: Our findings indicated that rehabilitation programs that control the vertical movement of the centre of mass during gait are important to improve walking ability in the early post-operative phase after THA. © 2012 Wichtig Editore.

Furuse H.,Yamagata Prefectural Central Hospital | Maeda K.,Yamagata Prefectural University of Health Sciences
Pathology International | Year: 2012

T/NK-cell lymphoma of the salivary gland is rare. A 58-year-old man complained of a tumor mass in the left parotid gland region and he was diagnosed to have a left parotid tumor. The tumor was subsequently resected, revealing a diffuse growth pattern of medium to large sized atypical cells. The tumor was surrounded by fibrous connective tissue in the form of a capsule, and those were positive for CD3, CD4, CD5 and CD30, but negative for Bcl2, CD8, CD10, CD15, CD20, CD25, CD56, CD79a, CD246, EMA, granzyme B, TdT and TIA-1. There was no molecular evidence of Epstein-Barr virus (EBV) infection. It was diagnosed as peripheral T-cell lymphoma (PTCL) arising from an intraglandular lymph node in the parotid gland. In conclusion, Only 17 cases of primary T/NK-cell lymphoma of the salivary glands have been recorded until now, and the characteristics of these are not clear yet. Additional study is needed. © 2011 The Authors. Pathology International © 2011 Japanese Society of Pathology and Blackwell Publishing Asia Pty Ltd.

Kiyoshige Y.,Yamagata Prefectural University of Health Sciences | Watanabe E.,Saiseikai Yamagata Hospital
Archives of Gerontology and Geriatrics | Year: 2015

The cause of falls is multifactorial, however, hip fractures in elderly would be prevented if accidental falls are predictable. We assessed magnetic resonance images of 38 patients with groin pain after taking a fall whose fracture could not be detected by plain X-rays, and 45 patients with no episode of falls. Their ages were over 65 years. Fatty degeneration of muscles, gluteus maximus, gluteus medius, gluteus minimus, obturator externus, adductor longus, rectus femoris and iliopsoas muscles, were evaluated by Goutallier's staging. Odds ratio was calculated by a logistic regression analysis allocating dependent variable for falls and independent variables for Goutallier's stage, age and gender. The fatty degeneration of gluteus maximus muscle was generalized, while that of gluteus minimus muscle was unevenly distributed, especially in anterior area. Gluteus minimus muscle initiated its fatty degeneration earlier than gluteus medius muscle. Odds ratio of falling was 3.2 (95% confidence intervals: 1, 14, 8.94) for Goutallier' stage of the gluteus medius muscle. Fatty degeneration of gluteus medius muscle has a crucial role in providing stability of the pelvis including hip joint. Evaluating fatty streaks in the gluteus minimus muscle could help give early indication to those who have a higher risk of falling. © 2014 Elsevier Ireland Ltd.

Sawada Y.,Tohoku University | Sawada Y.,Okayama Prefectural University | Nishio Y.,Tohoku University | Suzuki K.,Tohoku University | And 10 more authors.
PLoS ONE | Year: 2012

The attentional set-shifting deficit that has been observed in Parkinson's disease (PD) has long been considered neuropsychological evidence of the involvement of meso-prefrontal and prefrontal-striatal circuits in cognitive flexibility. However, recent studies have suggested that non-dopaminergic, posterior cortical pathologies may also contribute to this deficit. Although several neuroimaging studies have addressed this issue, the results of these studies were confounded by the use of tasks that required other cognitive processes in addition to set-shifting, such as rule learning and working memory. In this study, we attempted to identify the neural correlates of the attentional set-shifting deficit in PD using a compound letter task and 18F-fluoro-deoxy-glucose (FDG) positron emission tomography during rest. Shift cost, which is a measure of attentional set-shifting ability, was significantly correlated with hypometabolism in the right dorsolateral prefrontal cortex, including the putative human frontal eye field. Our results provide direct evidence that dysfunction in the dorsolateral prefrontal cortex makes a primary contribution to the attentional set-shifting deficit that has been observed in PD patients. © 2012 Sawada et al.

Minamisawa T.,Yamagata Prefectural University of Health Sciences | Sawahata H.,Niigata University | Takakura K.,Yamagata University | Yamaguchi T.,Yamagata University
Gait and Posture | Year: 2012

Stance instability is seen in late stage Parkinson's disease (PD). Stabilometer-based center-of-pressure (COP) evaluation is an easy, routine method for measuring postural control ability. Most of the stabilometer- and force plate-based studies on upright postural control have discussed horizontal COP component control. Previous studies on vertical component control have been few, and no fractal analysis-based study on the component has been reported. We aimed to show the influence of neurological changes and aging on the vertical component and the difference in fluctuation pattern behavior in healthy young and elderly subjects as well as Parkinsonian patients. Detrended fluctuation analysis was used to study characteristics of fluctuation of vertical ground reaction force. In the three groups, all scaling exponents (α, α1, α2), which are time-correlated data of vertical ground reaction force, had a value >0 and <0.5 (0<α<0.5). Additionally, α and α2 were significantly different between PD and the other groups. Significant differences were observed between PD and the other groups regarding RMS, maximum peak value, and coefficient of variance. We demonstrated statistically significant differences in vertical ground reaction force between Parkinsonian patients and the other groups, suggesting that a neurological influence with PD may be markedly reflected in the vertical ground reaction force. © 2011 Elsevier B.V.

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