Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No.03CH37439)最新文献_第3页

Mapping 3D sensory inputs onto spinal interneurons 将3D感觉输入映射到脊髓中间神经元

Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No.03CH37439) Pub Date : 2003-12-01 DOI: 10.1109/IEMBS.2003.1280999

C. Heckman, M.D. Johnson, A. Hyngstrom, E. Perreault

引用次数: 0

Stretch reflex gain and threshold changes as a function of elbow stretch velocity in hemiparetic stroke 在偏瘫中风中，伸展反射增益和阈值随肘部伸展速度的变化而变化

Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No.03CH37439) Pub Date : 2003-12-01 DOI: 10.1109/IEMBS.2003.1279609

J. Dewald, B. Schmit

引用次数: 4

An improved MRI method for dynamic contrast-enhanced imaging of tumors 一种用于肿瘤动态增强成像的改进MRI方法

Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No.03CH37439) Pub Date : 2003-12-01 DOI: 10.1109/IEMBS.2003.1279733

Xiuquan Ji, Jingfei Ma, M. Aref, E. Wiener, Zhi-Pei Liang

引用次数: 1

Muscle contributions to limb stiffness and stability in three dimensions 肌肉对肢体僵硬和稳定的贡献是三维的

Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No.03CH37439) Pub Date : 2003-12-01 DOI: 10.1109/IEMBS.2003.1279594

E. Perreault, V. Ravichandran, C. Heckman, T. Sandercock

{"title":"Muscle contributions to limb stiffness and stability in three dimensions","authors":"E. Perreault, V. Ravichandran, C. Heckman, T. Sandercock","doi":"10.1109/IEMBS.2003.1279594","DOIUrl":"https://doi.org/10.1109/IEMBS.2003.1279594","url":null,"abstract":"Successful task completion requires strength to counter external forces acting on a limb and stability to maintain limb posture. However, these simultaneous requirements can be at odds with each other as reaction forces directed towards the joints can interact with limb geometry to reduce limb stability. Net stability is due to these external force effects combined with the stability provided by muscles resisting those forces. The goal of this study was to quantify the contributions of cat hindlimb muscles to the 3D force generation and stability properties of the entire limb. Our hypothesis is that anti-gravity extensors must be co-activated with flexors to counter the destabilizing effects of the ground reaction forces directed towards the joints. Data were collected during three experimental conditions: passive, electrical stimulation of the triceps surae on its own, and in conjunction with the hamstrings. We found that the hamstrings muscle group, a leg extensor, destabilized hindlimb posture. These instabilities could be countered by simultaneous co-contraction of the triceps surae muscle group, which had a net ground reaction force in flexion direction. These initial results support our hypothesis that muscles generating downward forces (leg extensors) decrease limb stability.","PeriodicalId":258551,"journal":{"name":"Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No.03CH37439)","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115066352","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Indices of aortic stiffness in mice 小鼠主动脉僵硬指数

Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No.03CH37439) Pub Date : 2003-12-01 DOI: 10.1109/IEMBS.2003.1279605

A. Reddy, Yi-Heng Li, T. Pham, G. Taffet, L. Michael, M. Entman, C. Hartley

{"title":"Indices of aortic stiffness in mice","authors":"A. Reddy, Yi-Heng Li, T. Pham, G. Taffet, L. Michael, M. Entman, C. Hartley","doi":"10.1109/IEMBS.2003.1279605","DOIUrl":"https://doi.org/10.1109/IEMBS.2003.1279605","url":null,"abstract":"Ascending aortic input impedance spectra and pressure augmentation index was determined in young (8-month) and old (29-month) mice to see if arterial stiffening occurred with age in mice as it does in humans. Pressure and blood velocity signals measured simultaneously from the same location in the ascending aorta of a mouse were used to determine input impedance spectra (DC-10 harmonics). The first minimum of the impedance modulus shifted from the 2nd harmonic in young mice to the 4th harmonic in old mice. Characteristic impedance (estimated as average of 2nd to 10th harmonic) was significantly higher in old mice (mean/spl plusmn/SEM, 471/spl plusmn/62 vs. 299110 dynes-s/cm/sup 3/, p<0.05). Pulse pressure and augmentation index, determined from the aortic pressure signals were also higher in old mice: pulse pressure (42/spl plusmn/2.2 vs. 29/spl plusmn/4.9 mmHg, p<0.05) and augmentation index (37/spl plusmn/5 vs. 14/spl plusmn/2 %, p<0.005). These results are similar to the findings reported in humans and confirm that mice may be used as models of age-related vascular stiffening.","PeriodicalId":258551,"journal":{"name":"Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No.03CH37439)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133884457","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Motor unit action potential counts in surface electrode array EMG 在表面电极阵列肌电图中计算运动单元动作电位

Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No.03CH37439) Pub Date : 2003-12-01 DOI: 10.1109/IEMBS.2003.1280143

P. Zhou, Z. Erim, W. Rymer

引用次数: 7

Effects of pain on shoulder jerk in elderly subjects during repetitive lifting 老年人重复举重时肩举疼痛的影响

Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No.03CH37439) Pub Date : 2003-12-01 DOI: 10.1109/IEMBS.2003.1279732

J.C. Slaboda, J. Boston, T. Rudy, S. Lieber, D. M. Rasetshwane, D. Weiner

{"title":"Effects of pain on shoulder jerk in elderly subjects during repetitive lifting","authors":"J.C. Slaboda, J. Boston, T. Rudy, S. Lieber, D. M. Rasetshwane, D. Weiner","doi":"10.1109/IEMBS.2003.1279732","DOIUrl":"https://doi.org/10.1109/IEMBS.2003.1279732","url":null,"abstract":"The purpose of this study was to determine if jerk, (rate of change of acceleration) differs in elderly control and CLBP patients during a lifting task. Jerk was calculated for the shoulder trajectory, since shoulder motion depends on motion at both the hips and knees. To reduce noise, Woltring's GCV hepatic spline was fitted to the data and derivatives were calculated through differentiation of the spline coefficients. A root mean square (rms) measure of jerk was used for comparison. The rms jerk values for the lifts were designated as early, middle or late based on the number of repetitions completed by the subject, and a repeated measures analysis of variance allowed testing for changes over time during the task. Lift duration was also analyzed. Significant group differences were found for lift duration and rms jerk, with controls lifting faster and generating greater values of jerk than CLBP patients. Changes over time were also observed in which lift duration decreased and jerk increased with task time. A group by time interaction occurred for lift duration but not for jerk. In general, patients had slower lifts with lower jerk values than controls, suggesting that pain impacts lifting style.","PeriodicalId":258551,"journal":{"name":"Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No.03CH37439)","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114259944","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

fNIR spectroscopy as a measure of cognitive task load 近红外光谱作为认知任务负荷的测量

Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No.03CH37439) Pub Date : 2003-12-01 DOI: 10.1109/IEMBS.2003.1280883

K. Izzetoglu, S. Bunce, M. Izzetoglu, B. Onaral, K. Pourrezaei

{"title":"fNIR spectroscopy as a measure of cognitive task load","authors":"K. Izzetoglu, S. Bunce, M. Izzetoglu, B. Onaral, K. Pourrezaei","doi":"10.1109/IEMBS.2003.1280883","DOIUrl":"https://doi.org/10.1109/IEMBS.2003.1280883","url":null,"abstract":"Functional near infrared (fNIR) sensor measures hemodynamic changes in the cortex using a portable, safe, affordable and negligibly intrusive NIR based optical brain imaging system. We hypothesize that there is a positive correlation between blood oxygenation in the relevant areas of dorsolateral prefrontal cortex and cognitive effort defined as attention and working memory. In this paper, we present the employment of the fNIR sensor to assess the cognitive state of the user. The paper also introduces the experimental setup and analysis of the fNIR data acquired from the forehead during a video-game like task namely, \"Warship Commander Task\" (WCT). In the WCT, the primary task is air warfare management. While performing the air warfare task, task difficulty and task load are manipulated by changing the number of tracks per wave and the number of more difficult \"yellow\" tracks. We explored in this paper, the correlation between cognitive task load, the subject's performance and dorsolateral prefrontal cortex oxygenation level changes. Our data analysis results show that fNIR blood oxygenation changes are significantly sensitive to wave size (task load) changes.","PeriodicalId":258551,"journal":{"name":"Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No.03CH37439)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115461607","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 29

Proposing the IOC pedagogy for Japanese higher education in the Universalize era 提出大众化时代日本高等教育的IOC教学法

Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No.03CH37439) Pub Date : 2003-12-01 DOI: 10.1109/IEMBS.2003.1280911

K. Soetanto

{"title":"Proposing the IOC pedagogy for Japanese higher education in the Universalize era","authors":"K. Soetanto","doi":"10.1109/IEMBS.2003.1280911","DOIUrl":"https://doi.org/10.1109/IEMBS.2003.1280911","url":null,"abstract":"During the past decade, there has been a deregulation in the Japanese higher education system caused by the mass education era. Usually, the Japanese University is difficult to get into and easy to get out of; however, recently, more universities have become more easy to get in and easy to get out of, because of the mass education era and decreased population of 18 years old students. The faculty has to face the less motivated students who come to class without the basic knowledge of science and engineering. Therefore, there is a need for changes in the teaching and learning system. A pilot study of an experimental design for assessing impact on changes in student motivation on the Japanese higher education system is presented. This paper will discuss the experiences over the last eight years from 1993 to 2001 in the course of digital circuit design of biomedical engineering study in the Toin University of Yokohama by using the Interactive Operational Control, IOC. The IOC technique combines innovative learning strategies, such as interactive and cooperative learning, with uses of the discipline, the role model, the presentation and the feedback. The students have reacted positively to this novel approach, which can be adapted to many others courses. The technique has been proven to be effective, shown by the students'grades. In this paper, the teaching strategy and responses of the students will be presented.","PeriodicalId":258551,"journal":{"name":"Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No.03CH37439)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127542184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Myocardial stunning analyzed by a single muscle fiber model 用单个肌纤维模型分析心肌休克

Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No.03CH37439) Pub Date : 2003-12-01 DOI: 10.1109/IEMBS.2003.1279520

J.K. Li, G. Drzewiecki, T. Barton, K. Khaw, J. Kedem

引用次数: 2