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https://www.readbyqxmd.com/read/28227902/impairment-of-muscle-force-transmission-in-spastic-paretic-muscles-of-stroke-survivors
#1
Xiaogang Hu, Babak Afsharipour, William Zev Rymer, Nina L Suresh, Xiaogang Hu, Babak Afsharipour, William Zev Rymer, Nina L Suresh, Xiaogang Hu, Babak Afsharipour, William Zev Rymer, Nina L Suresh
Hemispheric stroke survivors tend to have persistent motor impairments, with muscle weakness and muscle spasticity observed concurrently in the affected muscles. The objective of this preliminary study was to identify whether impairment of muscle force transmission could contribute to weakness in spastic-paretic muscles of chronic stroke survivors. To characterize the efficiency of the transmission of muscle forces to the tendon, we activated biceps brachii muscle electrically by stimulating the musculocutaneous nerve with maximum current...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227832/sinusoidal-stimulation-trains-suppress-epileptiform-spikes-induced-by-4-ap-in-the-rat-hippocampal-ca1-region-in-vivo
#2
Zheshan Guo, Zhouyan Feng, Ying Yu, Wenjie Zhou, Zhaoxiang Wang, Xuefeng Wei, Zheshan Guo, Zhouyan Feng, Ying Yu, Wenjie Zhou, Zhaoxiang Wang, Xuefeng Wei, Ying Yu, Zhouyan Feng, Xuefeng Wei, Zhaoxiang Wang, Zheshan Guo, Wenjie Zhou
Deep brain stimulation (DBS) shows promises in the treatment of refractory epilepsy. Due to the complex causes of epilepsy, the mechanisms of DBS are still unclear. Depolarization block caused by the persistent excitation of neurons may be one of the possible mechanisms. To test the hypothesis, 4-aminopyridine (4-AP) was injected in rat hippocampal CA1 region in-vivo to induce epileptiform activity. Sinusoidal stimulation trains were applied to the afferent pathway (Schaffer collaterals) of CA1 region to suppress the epileptiform spikes...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227541/effects-of-electrode-displacement-in-high-definition-transcranial-direct-current-stimulation-a-computational-study
#3
Hyeon Seo, Donghyeon Kim, Sung Chan Jun, Hyeon Seo, Donghyeon Kim, Sung Chan Jun, Donghyeon Kim, Sung Chan Jun, Hyeon Seo
In order to understand better the ways in which cortical excitability is linked to target brain areas, this study describes the effects of focalized high-definition transcranial direct current stimulation (HD-tDCS), and investigates the way in which these effects persisted after the stimulus electrodes were displaced from the target area. We constructed a 3D volume conduction model of an anatomically realistic head that is ideal for HD-tDCS, as well as compartmental models of layer 3 and layer 5 pyramidal neurons...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28227425/mechanical-performances-of-endovascular-aneurysm-repair-strategies-with-main-aortic-and-chimney-grafts
#4
Wei-Ling Chen, Bing-Feng Huang, Ming-Long Yeh, Chung-Dann Kan, Wei-Ling Chen, Bing-Feng Huang, Ming-Long Yeh, Chung-Dann Kan, Ming-Long Yeh, Bing-Feng Huang, Chung-Dann Kan, Wei-Ling Chen
The use of endovascular aneurysm repair (EVAR) strategies for the treatment of complex aortic pathologies is a major area of investigation in modern surgery. EVAR strategies using fenestrated or branched devices provide alternatives to open surgery for patients with aortic pathologies with visceral branch involvement, but their applications have some major limitations. To extend endovascular repair to patients whose anatomy is unfit for branched or fenestrated stent grafts or open repair, parallel graft techniques using chimney grafts (CGs) have been proposed...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226876/brain-activation-profiles-in-mtbi-evidence-from-erp-activity-of-working-memory-response
#5
Lianyang Li, Xianghong Arakaki, Thao Tran, Michael Harrington, Nikhil Padhye, George Zouridakis, Lianyang Li, Xianghong Arakaki, Thao Tran, Michael Harrington, Nikhil Padhye, George Zouridakis, Nikhil Padhye, Xianghong Arakaki, Thao Tran, Michael Harrington, George Zouridakis, Lianyang Li
In this study we analyzed event related potentials (ERPs) obtained in an N-back working memory test that varied in difficulty from 0- to 2-back. We collected 21 channels of activity from 11 mild traumatic brain injury (mTBI) patients and 7 normal controls, on three different visits, and used the amplitude and latency of the P300 component to characterize the subjects. A preprocessing procedure based on independent component analysis was used first to identify and eliminate electrophysiological noise on a single trial basis...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226766/a-neuromorphic-circuit-mimicking-biological-short-term-memory
#6
Saeid Barzegarjalali, Alice C Parker, Saeid Barzegarjalali, Alice C Parker, Alice C Parker, Saeid Barzegarjalali
Research shows that the way we remember things for a few seconds is a different mechanism from the way we remember things for a longer time. Short-term memory is based on persistently firing neurons, whereas storing information for a longer time is based on strengthening the synapses or even forming new neural connections. Information about location and appearance of an object is segregated and processed by separate neurons. Furthermore neurons can continue firing using different mechanisms. Here, we have designed a biomimetic neuromorphic circuit that mimics short-term memory by firing neurons, using biological mechanisms to remember location and shape of an object...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226611/beat-to-beat-variability-of-p-wave-in-patients-suffering-from-atrial-fibrillation
#7
Federica Censi, Giovanni Calcagnini, Eugenio Mattei, Alessandro Ricci, Ivan Corazza, Elisa Reggiani, Giuseppe Boriani, Federica Censi, Giovanni Calcagnini, Eugenio Mattei, Alessandro Ricci, Ivan Corazza, Elisa Reggiani, Giuseppe Boriani, Elisa Reggiani, Giuseppe Boriani, Ivan Corazza, Alessandro Ricci, Federica Censi, Eugenio Mattei, Giovanni Calcagnini
The aim of this paper was to analyze the P-wave variability over time in patients suffering from Atrial Fibrillation (AF). Behind some time-domain and morphological features of the P-wave template, two novel indexes of P-wave variability have been estimated: one based on the cross-correlation coefficients among the P-waves (Correlation Index, CI), and one associated to variation of P-waves amplitude (Amplitude Index, AI). These indexes were estimated in two experimental models: patients suffering from persistent AF respect to control subjects and patients developing post-operative AF (POAF) after coronary artery bypass grafting respect to patients without POAF...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226544/kurtosis-as-a-statistical-approach-to-identify-the-pivot-point-of-the-rotor
#8
Shivaram P Arunachalam, Elizabeth M Annoni, Siva K Mulpuru, Paul A Friedman, Elena G Tolkacheva, Shivaram P Arunachalam, Elizabeth M Annoni, Siva K Mulpuru, Paul A Friedman, Elena G Tolkacheva, Elena G Tolkacheva, Paul A Friedman, Elizabeth M Annoni, Siva K Mulpuru, Shivaram P Arunachalam
Atrial fibrillation (AF) is the most common sustained cardiac arrhythmia that causes stroke affecting more than 2.3 million people in the US. Catheter ablation to terminate AF is successful for paroxysmal AF but suffers limitations with persistent AF patients as current mapping methods cannot identify AF active substrates outside of pulmonary vein region. In this work, we developed a novel Kurtosis based mapping technique that can accurately identify pivot points of the rotors that were induced in ex-vivo isolated rabbit heart...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226414/methylene-blue-for-the-treatment-of-intractable-pain-associated-with-oral-mucositis
#9
Carlos J Roldan, Kent Nouri, Thomas Chai, Billy Huh
Oral mucositis is a common and often debilitating complication among cancer patients receiving radiation therapy to the head and neck or chemotherapy agents, or undergoing hematopoietic stem cell transplantation. Pain and decreased oral function associated with oral mucositis may persist long after the conclusion of therapy. Although most patients respond to conservative management, a subset of patients develop intractable pain with severe consequences. For some, the use of total parenteral nutrition with insertion of percutaneous endoscopic gastrostomy feeding tubes is the only alternative...
February 22, 2017: Pain Practice: the Official Journal of World Institute of Pain
https://www.readbyqxmd.com/read/28226332/responsible-safe-and-effective-prescription-of-opioids-for-chronic-non-cancer-pain-american-society-of-interventional-pain-physicians-asipp-guidelines
#10
Laxmaiah Manchikanti, Adam M Kaye, Nebojsa Nick Knezevic, Heath McAnally, Konstantin Slavin, Andrea M Trescot, Susan Blank, Vidyasagar Pampati, Salahadin Abdi, Jay S Grider, Alan D Kaye, Kavita N Manchikanti, Harold Cordner, Christopher G Gharibo, Michael E Harned, Sheri L Albers, Sairam Atluri, Steve M Aydin, Sanjay Bakshi, Robert L Barkin, Ramsin M Benyamin, Mark V Boswell, Ricardo M Buenaventura, Aaron K Calodney, David L Cedeno, Sukdeb Datta, Timothy R Deer, Bert Fellows, Vincent Galan, Vahid Grami, Hans Hansen, Standiford Helm Ii, Rafael Justiz, Dhanalakshmi Koyyalagunta, Yogesh Malla, Annu Navani, Kent H Nouri, Ramarao Pasupuleti, Nalini Sehgal, Sanford M Silverman, Thomas T Simopoulos, Vijay Singh, Daneshvari R Solanki, Peter S Staats, Ricardo Vallejo, Bradley W Wargo, Arthur Watanabe, Joshua A Hirsch
BACKGROUND: Opioid use, abuse, and adverse consequences, including death, have escalated at an alarming rate since the 1990s. In an attempt to control opioid abuse, numerous regulations and guidelines for responsible opioid prescribing have been developed by various organizations. However, the US opioid epidemic is continuing and drug dose deaths tripled during 1999 to 2015. Recent data show a continuing increase in deaths due to natural and semisynthetic opioids, a decline in methadone deaths, and an explosive increase in the rates of deaths involving other opioids, specifically heroin and illicit synthetic fentanyl...
February 2017: Pain Physician
https://www.readbyqxmd.com/read/28226276/different-associations-of-albuminuria-with-total-and-cardiovascular-mortality-by-concentrations-of-persistent-organic-pollutants-in-the-elderly
#11
Hyun-Woo Kim, Jung-Hyun Kim, Dong-Won Lee, Sang-Hyun Cho, Ji-Hoon Jung, Ki-Su Kim, Duk-Hee Lee
Epidemiologic studies have indicated that albuminuria is associated with mortality from all causes and cardiovascular disease (CVD), with substantial heterogeneity. We evaluated if the associations of urine albumin creatinine ratio (ACR) with all-cause and CVD mortality differed depending on serum concentrations of persistent organic pollutants (POPs), strong lipophilic chemical mixtures with very long half-lives, which are recently linked to many degenerative diseases. Study subjects were participants of the National Health and Nutrition Examination Survey 1999-2004 who were 60 years or older at baseline (n=1215 and 1067 for organochlorine pesticides (OCPs) and other POPs, respectively)...
February 18, 2017: Environmental Research
https://www.readbyqxmd.com/read/28226259/synthesis-optimization-of-oil-palm-empty-fruit-bunch-and-rice-husk-biochars-for-removal-of-imazapic-and-imazapyr-herbicides
#12
Saba Yavari, Amirhossein Malakahmad, Nasiman B Sapari, Sara Yavari
Imidazolinones are a family of herbicides that are used to control a broad range of weeds. Their high persistence and leaching potential make them probable risk to the ecosystems. In this study, biochar, the biomass-derived solid material, was produced from oil palm empty fruit bunches (EFB) and rice husk (RH) through pyrolysis process. Feedstock and pyrolysis variables can control biochar sorption capacity. Therefore, the present study attempts to evaluate effects of three pyrolysis variables (temperature, heating rate and retention time) on abilities of biochars for removal of imazapic and imazapyr herbicides from soil...
February 18, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28225941/-health-inequality-on-results-and-access-indicators-for-children-in-mexico-analysis-of-national-health-surveys
#13
Juan Pablo Gutiérrez, Sebastián García-Saisó, Rodrigo Espinosa-de la Peña, Dulce Alejandra Balandrán
Objective: To analyze inequalities in health care indicators of children 0 to 9 years old in Mexico reporting gap and gradient measures. Materials and methods: Cross-sectional analysis of national health surveys in 2000, 2006 and 2012, measuring absolute and relative gap measures as well as the Slope Index of Inequality for four health care indicators (vaccination, care for acute respiratory infections, care for acute diarrheal diseases, and care for accidents) with socioeconomic stratification, as well as absolute gaps by sex, urbanicity and ethnic background...
November 2016: Salud Pública de México
https://www.readbyqxmd.com/read/28225909/tuberculosis-as-a-marker-of-inequities-in-the-context-of-socio-spatial-transformation
#14
Alexandre San Pedro, Gerusa Gibson, Jefferson Pereira Caldas Dos Santos, Luciano Medeiros de Toledo, Paulo Chagastelles Sabroza, Rosely Magalhães de Oliveira
OBJECTIVE: This study aims to analyze the association between the incidence of tuberculosis and different socioeconomic indicators in a territory of intense transformation of the urban space. METHODS: This is an ecological study, whose analysis units were the neighborhoods of the city of Itaboraí, state of Rio de Janeiro, Brazil. The data have been analyzed by generalized linear models. The response variable was incidence of tuberculosis from 2006 to 2011. The independent variables were the socio-demographic indicators...
February 16, 2017: Revista de Saúde Pública
https://www.readbyqxmd.com/read/28225900/chronic-chagas-cardiomyopathy-a-review-of-the-main-pathogenic-mechanisms-and-the-efficacy-of-aetiological-treatment-following-the-benznidazole-evaluation-for-interrupting-trypanosomiasis-benefit-trial
#15
Anis Rassi, José Antonio Marin, Anis Rassi
Chagas cardiomyopathy is the most frequent and most severe manifestation of chronic Chagas disease, and is one of the leading causes of morbidity and death in Latin America. Although the pathogenesis of Chagas cardiomyopathy is incompletely understood, it may involve several mechanisms, including parasite-dependent myocardial damage, immune-mediated myocardial injury (induced by the parasite itself and by self-antigens), and microvascular and neurogenic disturbances. In the past three decades, a consensus has emerged that parasite persistence is crucial to the development and progression of Chagas cardiomyopathy...
March 2017: Memórias do Instituto Oswaldo Cruz
https://www.readbyqxmd.com/read/28225894/chronic-chagas-cardiomyopathy-a-review-of-the-main-pathogenic-mechanisms-and-the-efficacy-of-aetiological-treatment-following-the-benznidazole-evaluation-for-interrupting-trypanosomiasis-benefit-trial
#16
Anis Rassi, José Antonio Marin, Anis Rassi
Chagas cardiomyopathy is the most frequent and most severe manifestation of chronic Chagas disease, and is one of the leading causes of morbidity and death in Latin America. Although the pathogenesis of Chagas cardiomyopathy is incompletely understood, it may involve several mechanisms, including parasite-dependent myocardial damage, immune-mediated myocardial injury (induced by the parasite itself and by self-antigens), and microvascular and neurogenic disturbances. In the past three decades, a consensus has emerged that parasite persistence is crucial to the development and progression of Chagas cardiomyopathy...
February 16, 2017: Memórias do Instituto Oswaldo Cruz
https://www.readbyqxmd.com/read/28225836/analysis-of-immune-cell-populations-in-atrial-myocardium-of-patients-with-atrial-fibrillation-or-sinus-rhythm
#17
Natalia Smorodinova, Martin Bláha, Vojtěch Melenovský, Karolína Rozsívalová, Jaromír Přidal, Mária Ďurišová, Jan Pirk, Josef Kautzner, Tomáš Kučera
BACKGROUND: Atrial fibrillation (AF) is the most common arrhythmia and despite obvious clinical importance remains its pathogenesis only partially explained. A relation between inflammation and AF has been suggested by findings of increased inflammatory markers in AF patients. OBJECTIVE: The goal of this study was to characterize morphologically and functionally CD45-positive inflammatory cell populations in atrial myocardium of patients with AF as compared to sinus rhythm (SR)...
2017: PloS One
https://www.readbyqxmd.com/read/28225830/ex-vivo-activation-of-cd4-t-cells-from-donors-on-suppressive-art-can-lead-to-sustained-production-of-infectious-hiv-1-from-a-subset-of-infected-cells
#18
John K Bui, Elias K Halvas, Elizabeth Fyne, Michele D Sobolewski, Dianna Koontz, Wei Shao, Brian Luke, Feiyu F Hong, Mary F Kearney, John W Mellors
The fate of HIV-infected cells after reversal of proviral latency is not well characterized. Simonetti, et al. recently showed that CD4+ T-cells containing intact proviruses can clonally expand in vivo and produce low-level infectious viremia. We hypothesized that reversal of HIV latency by activation of CD4+ T-cells can lead to the expansion of a subset of virus-producing cells rather than their elimination. We established an ex vivo cell culture system involving stimulation of CD4+ T-cells from donors on suppressive antiretroviral therapy (ART) with PMA/ionomycin (day 1-7), followed by rest (day 7-21), and then repeat stimulation (day 21-28), always in the presence of high concentrations of raltegravir and efavirenz to effectively block new cycles of viral replication...
February 22, 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28225820/analysis-of-spatial-mobility-in-subjects-from-a-dengue-endemic-urban-locality-in-morelos-state-mexico
#19
Jorge Abelardo Falcón-Lezama, René Santos-Luna, Susana Román-Pérez, Ruth Aralí Martínez-Vega, Marco Arieli Herrera-Valdez, Ángel Fernando Kuri-Morales, Ben Adams, Pablo Antonio Kuri-Morales, Malaquías López-Cervantes, José Ramos-Castañeda
INTRODUCTION: Mathematical models and field data suggest that human mobility is an important driver for Dengue virus transmission. Nonetheless little is known on this matter due the lack of instruments for precise mobility quantification and study design difficulties. MATERIALS AND METHODS: We carried out a cohort-nested, case-control study with 126 individuals (42 cases, 42 intradomestic controls and 42 population controls) with the goal of describing human mobility patterns of recently Dengue virus-infected subjects, and comparing them with those of non-infected subjects living in an urban endemic locality...
2017: PloS One
https://www.readbyqxmd.com/read/28225768/anti-rheumatic-treatment-is-not-associated-with-reduction-of-pentraxin-3-in-rheumatoid-arthritis-psoriatic-arthritis-and-ankylosing-spondylitis
#20
Gia Deyab, Ingrid Hokstad, Jon Elling Whist, Milada Cvancarova Småstuen, Stefan Agewall, Torstein Lyberg, Barbara Bottazzi, Pier Luigi Meroni, Roberto Leone, Gunnbjorg Hjeltnes, Ivana Hollan
BACKGROUND: Pentraxin 3 is proposed to be a marker of inflammation and cardiovascular risk, but its role in inflammatory rheumatic diseases (IRDs) is still uncertain. Therefore, we wanted to examine if anti-rheumatic treatment reduced serum PTX3 (s-PTX3) levels in IRDs, and if s-PTX3 levels were related to other markers of inflammation and to endothelial function (EF). METHODS: We examined s-PTX3, EF and established inflammatory biomarkers in 114 IRD patients from the PSARA study before and after 6 weeks and 6 months of treatment with methotrexate (MTX) or anti-tumor necrosis factor alpha (anti-TNF) therapy with or without MTX co-medication...
2017: PloS One
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