IEEE Engineering in Medicine and Biology Magazine最新文献_第9页

Hippocampal gamma oscillations in rats. 大鼠海马的伽马振荡。

IEEE Engineering in Medicine and Biology Magazine Pub Date : 2009-11-01 DOI: 10.1109/MEMB.2009.934619

Yasemin M Akay, Andrei Dragomir, Chuanze Song, Jie Wu, Metin Akay

{"title":"Hippocampal gamma oscillations in rats.","authors":"Yasemin M Akay, Andrei Dragomir, Chuanze Song, Jie Wu, Metin Akay","doi":"10.1109/MEMB.2009.934619","DOIUrl":"https://doi.org/10.1109/MEMB.2009.934619","url":null,"abstract":"Previous studies suggested that gamma oscillations in the brain are associated with higher order cognitive functions, including selective visual attention, motor task planning, sensory perception, working memory, and dreaming rapid eye movement (REM) sleep. These oscillations are mainly observed in the cortical regions and also occur in neocortical and subcortical areas and hippocampus. These oscillations may occur under certain pathological conditions, such as epilepsy, and are mainly observed in the cortical regions and hippocampus. The previous studies have suggested that epilepsy may be associated with disturbances of autonomic nervous system(ANS) and with changes in autonomic cardioregulatory function. In this article, we investigate the influence of acute exposure to 2-aminoethoxy-diphenylborate (2-APB), a membrane-permeable inositol 1,4,5-trisphosphate (IP) receptor, and store-operated Ca(2+) channel (SOC) blocker on the complexity of hippocampal gamma oscillations. Our central hypothesis is that acute exposure to 2-APB significantly reduces the hippocampal gamma oscillations. To test this hypothesis, we use brain-slice recordings and the advanced nonlinear dynamical analysis method based on the Lempel-Ziv (LZ) estimator. Our nonlinear dynamical analysis results estimated from brain-slice recordings suggested that 2-APB exposure significantly reduces the hippocampal gamma oscillations.","PeriodicalId":50391,"journal":{"name":"IEEE Engineering in Medicine and Biology Magazine","volume":"28 6","pages":"92-5"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/MEMB.2009.934619","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"28509552","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: 5

Tuning of the sequence technique. 序列技术的调整。

IEEE Engineering in Medicine and Biology Magazine Pub Date : 2009-11-01 DOI: 10.1109/MEMB.2009.934630

Dominique Laude, V Baudrie, Jean-Luc Elghozi

引用次数: 28

Autonomic neural control of cerebral hemodynamics. 自主神经控制脑血流动力学。

IEEE Engineering in Medicine and Biology Magazine Pub Date : 2009-11-01 DOI: 10.1109/MEMB.2009.934908

Georgios D Mitsis, Rong Zhang, Benjamin D Levine, Efthalia Tzanalaridou, Demosthenes G Katritsis, Vasilis Z Marmarelis

{"title":"Autonomic neural control of cerebral hemodynamics.","authors":"Georgios D Mitsis, Rong Zhang, Benjamin D Levine, Efthalia Tzanalaridou, Demosthenes G Katritsis, Vasilis Z Marmarelis","doi":"10.1109/MEMB.2009.934908","DOIUrl":"https://doi.org/10.1109/MEMB.2009.934908","url":null,"abstract":"Despite the rich innervation of the cerebral vasculature by both sympathetic and parasympathetic nerves, the role of autonomic control in cerebral circulation and, particularly, cerebral hemodynamics is not entirely clear. Previous animal studies have reported inconsistent results regarding the effects of electrical stimulation or denervation on cerebral blood flow (CBF), cerebral pressure-flow relationship, and cerebral vessel response to metabolic stimuli. Moreover, with the advance of transcranial Doppler ultrasound (TCD), which yields accurate measurements of CBF velocity (CBFV) with high time resolution, it has been found that in humans CBFV in the middle cerebral artery decreased substantially during lower body negative pressure (LBNP) and head-up tilt in the absence of systemic hypotension, which suggests the presence of cerebral vasoconstriction associated with augmented sympathetic nerve activity during orthostatic stress. These observations were based on assessing static measures of cerebral circulation, i.e., mean values of artevial blood pressure (ABP) and CBF with a low time resolution.","PeriodicalId":50391,"journal":{"name":"IEEE Engineering in Medicine and Biology Magazine","volume":"28 6","pages":"54-62"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/MEMB.2009.934908","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"28509545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 37

Concealed conduction effects in the atrium. 心房隐蔽传导效应。

IEEE Engineering in Medicine and Biology Magazine Pub Date : 2009-11-01 DOI: 10.1109/MEMB.2009.934628

Jan J Zebrowski, Pawel Kuklik, Teodor Buchner, Rafał Baranowski

{"title":"Concealed conduction effects in the atrium.","authors":"Jan J Zebrowski, Pawel Kuklik, Teodor Buchner, Rafał Baranowski","doi":"10.1109/MEMB.2009.934628","DOIUrl":"https://doi.org/10.1109/MEMB.2009.934628","url":null,"abstract":"A one-dimensional (1-D) model of the atrium together with the sinoatrial (SA) and atrioventricular (AV) nodes is presented in this article. The two nodes are each modeled by 15-element, diffusively coupled, modified van der Pol oscillator chains, while the atrium tissue is represented by a 90-element chain of diffusively coupled FitzHugh-Nagumo (FHN) equations. The modified van der Pol oscillators are able to reproduce physiologically important properties, such as the refraction period, phase-sensitivity properties, and modes of change of the action potential frequency. The activity of both branches of the autonomous nervous system may be introduced into the model in a simplified way. The model enables the study of the effect of the magnitude of the action potential conduction rate in the nodes on interspike intervals (ISIs; equivalent of RR intervals) and explains the occurrence of RR-interval alternans in certain patients. The effect of breathing modulation of heart rate and of a single deep breath can also be modeled. Finally, concealed conduction effects in the atrium are studied, yielding results comparable with recorded heart rate variability data.","PeriodicalId":50391,"journal":{"name":"IEEE Engineering in Medicine and Biology Magazine","volume":"28 6","pages":"24-9"},"PeriodicalIF":0.0,"publicationDate":"2009-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1109/MEMB.2009.934628","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"28509628","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: 1

Complexity of the short-term heart-rate variability. 短期心率变异性的复杂性。

IEEE Engineering in Medicine and Biology Magazine Pub Date : 2009-11-01 DOI: 10.1109/MEMB.2009.934621

Jose F Valencia, Montserrat Vallverdú, Rico Schroeder, Andreas Voss, Rafael Vázquez, Antonio Bayés de Luna, Pere Caminal

引用次数: 21

An Introductory Text to Bioengineering (Advanced Series in Biomechanics, Vol. 4) (Chien, S. et al; 2008) [Book reviews] 生物工程导论(生物力学高级系列，第4卷)(Chien, S. et al;2008)[书评]

IEEE Engineering in Medicine and Biology Magazine Pub Date : 2009-09-22 DOI: 10.1109/MEMB.2009.934241

H. Sung

引用次数: 1

Attorneys' fees for the winner [Patents] 胜诉方的律师费[专利]

IEEE Engineering in Medicine and Biology Magazine Pub Date : 2009-09-22 DOI: 10.1109/MEMB.2009.934251

M. Klee

引用次数: 1

Normal versus pathological voice signals. 正常与病理语音信号。

IEEE Engineering in Medicine and Biology Magazine Pub Date : 2009-09-01 DOI: 10.1109/MEMB.2009.934248

Everthon Fonseca, Jose Pereira

引用次数: 29

Don't play it again, Sam. 别再弹了，萨姆。

IEEE Engineering in Medicine and Biology Magazine Pub Date : 2009-09-01 DOI: 10.1109/memb.2009.934237

Michael R Neuman

引用次数: 0

Pressure-detection algorithms. 压力检测算法。

IEEE Engineering in Medicine and Biology Magazine Pub Date : 2009-09-01 DOI: 10.1109/MEMB.2009.934246

J C Perfetto, A G Ruiz, R O Sirne, C E D'Attellis

引用次数: 6