A classic body composition method is estimation of total body skeletal muscle mass (SM, kg) from 24 h urinary creatinine excretion (Cr, g). Two types of prediction equations were suggested: one assumes a constant SM/C...A classic body composition method is estimation of total body skeletal muscle mass (SM, kg) from 24 h urinary creatinine excretion (Cr, g). Two types of prediction equations were suggested: one assumes a constant SM/Cr ratio; and the other assumes a highly variable SM/Cr ratio. We explored these two extreme possibilities by measuring SM with whole-body computerized axial tomography and collecting Cr during meat-free dietary conditions in 12 healthy young men. Prediction equations were developed in the men that fit these two equation types, SM = 21.8×Cr (SD and CV of SM/Cr ratio, 1.3 kg and 6.0%,respectively) and SM = 18.9 × Cr + 4.1 (r = 0.92, p = 2.55 × 10-5, and SEE = 1.9 kg). The validity of each model is reviewed. This is the first investigation of Cr-SM method using modern techniques for quantifying total body SM mass展开更多
A bionic flexible manipulator driven by pneumatic muscle actuator(PMA)can better reflect the flexibility of the mechanism.Current research on PMA mainly focuses on the modeling and control strategy of the pneumatic ma...A bionic flexible manipulator driven by pneumatic muscle actuator(PMA)can better reflect the flexibility of the mechanism.Current research on PMA mainly focuses on the modeling and control strategy of the pneumatic manipulator system.Compared with traditional electro-hydraulic actuators,the structure of PMA is simple but possesses strong nonlinearity and flexibility,which leads to the difficulty in improving the control accuracy.In this paper,the configuration design of a bionic flexible manipulator is performed by human physiological map,the kinematic model of the mechanism is established,and the dynamics is analyzed by Lagrange method.A fuzzy torque control algorithm is designed based on the computed torque method,where the fuzzy control theory is applied.The hardware experimental system is established.Through the co-simulation contrast test on MATLAB and ADAMS,it is found that the fuzzy torque control algorithm has better tracking performance and higher tracking accuracy than the computed torque method,and is applied to the entity control test.The experimental results show that the fuzzy torque algorithm can better control the trajectory tracking movement of the bionic flexible manipulator.This research proposes a fuzzy torque control algorithm which can compensate the error more effectively,and possesses the preferred trajectory tracking performance.展开更多
背景:肌少症是一种进行性、广泛性骨骼肌疾病,与老年人骨关节炎、骨折、肢体残疾和死亡的发生密切相关。建立肌少症相关动物模型对了解肌少症病理生理机制以及找出有效治疗策略至关重要。目的:综述肌少症小鼠模型的评价标准及肌少症小...背景:肌少症是一种进行性、广泛性骨骼肌疾病,与老年人骨关节炎、骨折、肢体残疾和死亡的发生密切相关。建立肌少症相关动物模型对了解肌少症病理生理机制以及找出有效治疗策略至关重要。目的:综述肌少症小鼠模型的评价标准及肌少症小鼠模型的造模方法,并分析比较各种造模方式的优缺点,以期为肌少症的研究与诊疗提供参考。方法:以“肌少症,肌肉减少症,肌肉衰减症,骨骼肌衰老,小鼠模型,动物模型”为中文检索词,检索公式为“(肌少症OR肌肉减少症OR肌肉衰减症OR骨骼肌衰老)AND(小鼠模型OR动物模型)”;以“sarcopenia,skeletal muscle aging,mouse models,animal models”为英文检索词,检索公式为“(Sarcopenia OR Skeletal muscle aging)AND(Mouse model OR Animal models)”,检索中国知网、万方数据库和PubMed数据库在2010年1月至2022年10月期间与主题相关的文献,最终纳入59篇文献进行分析。结果与结论:①SAMP8小鼠造模时间较快,且肌肉萎缩类型与人类肌少症患者变化一致,因此是较为理想的模型;②手术法虽可以成功诱导肌肉萎缩,但需精确的手术操作,难度较大且较耗费时间;后肢悬吊法小鼠造模与老年人较类似,可视为老年肌少症的有效模型;③试剂注射造模虽操作简单,但无论是试剂的给药剂量及给药天数等尚不明确,需进一步研究;④转基因小鼠模型应用较少,其模型稳定性需进一步研究;⑤探索出一种成本低、耗时短并能高度模拟人体肌少症的小鼠模型仍是未来的研究方向。展开更多
目的探讨以针康法为主的中医整合康复技术对脑卒中后偏瘫患者的干预效果及对患者肢体肌力、肢体运动功能的影响。方法将医院针灸科、康复科收治的脑卒中后偏瘫患者90例纳入研究,随机分为对照组与中医整合康复组,各45例。两组均给予脑卒...目的探讨以针康法为主的中医整合康复技术对脑卒中后偏瘫患者的干预效果及对患者肢体肌力、肢体运动功能的影响。方法将医院针灸科、康复科收治的脑卒中后偏瘫患者90例纳入研究,随机分为对照组与中医整合康复组,各45例。两组均给予脑卒中常规西药治疗,对照组在此基础上给予常规康复训练,中医整合康复组在常规治疗基础上给予针康法、易筋经联合推拿治疗,共治疗8周后判定疗效。比较两组的中医证候积分,比较治疗前后患者肢体肌力[徒手肌力检查(Manual muscle testing,MMT)]、肌张力[改良Ashworth分级标准(MAS)]、肢体运动功能[Fug-Meyer运动功能量表(Fugl-Meyer assessment scale,FMA)]、神经功能[美国国立卫生研究院卒中量表(National Institute of Health stroke scale,NIHSS)]及生活质量[脑卒中专用生活质量量表(Stroke Specific Quality of Life,SS-QOL)]。彩色多普勒超声测定颈总动脉收缩期最大流速(Peak systolic velocity,PSV)、舒张末期最低流速(End diastolic velocity,EDV)及阻力指数(Resistance index,RI)等脑血流动力学参数。结果两组治疗后半身不遂、偏身麻木、口舌歪斜、言语謇涩、步履不稳、气短乏力等中医证候积分及总积分均较治疗前显著降低(P<0.05),中医整合康复组显著低于对照组(P<0.05)。中医整合康复组的显效率(51.1%,23/45)和有效率(95.5%,43/45)均明显优于对照组[24.4%(11/45)和82.2%(37/45)],组间比较差异有统计学意义(P<0.05)。两组治疗后MMT、FAM、SS-QOL评分及PSV、EDV值均较治疗前显著升高(P<0.05),中医整合康复组显著高于对照组(P<0.05);两组治疗后MAS、NIHSS评分及RI值均较治疗前显著降低(P<0.05),中医整合康复组显著低于对照组(P<0.05)。结论以针康法为主的中医整合康复技术治疗脑卒中后偏瘫效果显著,能够明显增强患者肢体肌力,降低肌张力,改善患者的肢体运动功能和神经功能,提高患者生活质量。展开更多
文摘A classic body composition method is estimation of total body skeletal muscle mass (SM, kg) from 24 h urinary creatinine excretion (Cr, g). Two types of prediction equations were suggested: one assumes a constant SM/Cr ratio; and the other assumes a highly variable SM/Cr ratio. We explored these two extreme possibilities by measuring SM with whole-body computerized axial tomography and collecting Cr during meat-free dietary conditions in 12 healthy young men. Prediction equations were developed in the men that fit these two equation types, SM = 21.8×Cr (SD and CV of SM/Cr ratio, 1.3 kg and 6.0%,respectively) and SM = 18.9 × Cr + 4.1 (r = 0.92, p = 2.55 × 10-5, and SEE = 1.9 kg). The validity of each model is reviewed. This is the first investigation of Cr-SM method using modern techniques for quantifying total body SM mass
基金Supported by National Natural Science Foundation of China(Grant No.51405229)Jiangsu Provincial Natural Science Foundation of China(Grant No.BK20151470)
文摘A bionic flexible manipulator driven by pneumatic muscle actuator(PMA)can better reflect the flexibility of the mechanism.Current research on PMA mainly focuses on the modeling and control strategy of the pneumatic manipulator system.Compared with traditional electro-hydraulic actuators,the structure of PMA is simple but possesses strong nonlinearity and flexibility,which leads to the difficulty in improving the control accuracy.In this paper,the configuration design of a bionic flexible manipulator is performed by human physiological map,the kinematic model of the mechanism is established,and the dynamics is analyzed by Lagrange method.A fuzzy torque control algorithm is designed based on the computed torque method,where the fuzzy control theory is applied.The hardware experimental system is established.Through the co-simulation contrast test on MATLAB and ADAMS,it is found that the fuzzy torque control algorithm has better tracking performance and higher tracking accuracy than the computed torque method,and is applied to the entity control test.The experimental results show that the fuzzy torque algorithm can better control the trajectory tracking movement of the bionic flexible manipulator.This research proposes a fuzzy torque control algorithm which can compensate the error more effectively,and possesses the preferred trajectory tracking performance.
文摘背景:肌少症是一种进行性、广泛性骨骼肌疾病,与老年人骨关节炎、骨折、肢体残疾和死亡的发生密切相关。建立肌少症相关动物模型对了解肌少症病理生理机制以及找出有效治疗策略至关重要。目的:综述肌少症小鼠模型的评价标准及肌少症小鼠模型的造模方法,并分析比较各种造模方式的优缺点,以期为肌少症的研究与诊疗提供参考。方法:以“肌少症,肌肉减少症,肌肉衰减症,骨骼肌衰老,小鼠模型,动物模型”为中文检索词,检索公式为“(肌少症OR肌肉减少症OR肌肉衰减症OR骨骼肌衰老)AND(小鼠模型OR动物模型)”;以“sarcopenia,skeletal muscle aging,mouse models,animal models”为英文检索词,检索公式为“(Sarcopenia OR Skeletal muscle aging)AND(Mouse model OR Animal models)”,检索中国知网、万方数据库和PubMed数据库在2010年1月至2022年10月期间与主题相关的文献,最终纳入59篇文献进行分析。结果与结论:①SAMP8小鼠造模时间较快,且肌肉萎缩类型与人类肌少症患者变化一致,因此是较为理想的模型;②手术法虽可以成功诱导肌肉萎缩,但需精确的手术操作,难度较大且较耗费时间;后肢悬吊法小鼠造模与老年人较类似,可视为老年肌少症的有效模型;③试剂注射造模虽操作简单,但无论是试剂的给药剂量及给药天数等尚不明确,需进一步研究;④转基因小鼠模型应用较少,其模型稳定性需进一步研究;⑤探索出一种成本低、耗时短并能高度模拟人体肌少症的小鼠模型仍是未来的研究方向。
文摘目的探讨以针康法为主的中医整合康复技术对脑卒中后偏瘫患者的干预效果及对患者肢体肌力、肢体运动功能的影响。方法将医院针灸科、康复科收治的脑卒中后偏瘫患者90例纳入研究,随机分为对照组与中医整合康复组,各45例。两组均给予脑卒中常规西药治疗,对照组在此基础上给予常规康复训练,中医整合康复组在常规治疗基础上给予针康法、易筋经联合推拿治疗,共治疗8周后判定疗效。比较两组的中医证候积分,比较治疗前后患者肢体肌力[徒手肌力检查(Manual muscle testing,MMT)]、肌张力[改良Ashworth分级标准(MAS)]、肢体运动功能[Fug-Meyer运动功能量表(Fugl-Meyer assessment scale,FMA)]、神经功能[美国国立卫生研究院卒中量表(National Institute of Health stroke scale,NIHSS)]及生活质量[脑卒中专用生活质量量表(Stroke Specific Quality of Life,SS-QOL)]。彩色多普勒超声测定颈总动脉收缩期最大流速(Peak systolic velocity,PSV)、舒张末期最低流速(End diastolic velocity,EDV)及阻力指数(Resistance index,RI)等脑血流动力学参数。结果两组治疗后半身不遂、偏身麻木、口舌歪斜、言语謇涩、步履不稳、气短乏力等中医证候积分及总积分均较治疗前显著降低(P<0.05),中医整合康复组显著低于对照组(P<0.05)。中医整合康复组的显效率(51.1%,23/45)和有效率(95.5%,43/45)均明显优于对照组[24.4%(11/45)和82.2%(37/45)],组间比较差异有统计学意义(P<0.05)。两组治疗后MMT、FAM、SS-QOL评分及PSV、EDV值均较治疗前显著升高(P<0.05),中医整合康复组显著高于对照组(P<0.05);两组治疗后MAS、NIHSS评分及RI值均较治疗前显著降低(P<0.05),中医整合康复组显著低于对照组(P<0.05)。结论以针康法为主的中医整合康复技术治疗脑卒中后偏瘫效果显著,能够明显增强患者肢体肌力,降低肌张力,改善患者的肢体运动功能和神经功能,提高患者生活质量。
