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https://www.readbyqxmd.com/read/28818257/high-risk-carotid-plaque-lessons-learned-from-histopathology
#1
Frank D Kolodgie, Kazuyuki Yahagi, Hiroyoshi Mori, Maria E Romero, Hugh H Trout, Aloke V Finn, Renu Virmani
The pathophysiology and natural history of atherosclerotic carotid disease is predicated on a more extensive knowledge of lesion progression gained in the studies conducted in the coronary arteries, and these will be reviewed. While the precise sequence of lesion progression leading to carotid plaque vulnerability and cerebrovascular events remain less well understood, specific early and more advanced progressive lesion morphologies associated with stroke risk have been characterized. Of late, there has been a conscious effort for stroke prevention in symptomatic and asymptomatic patients to move beyond luminal stenosis as the only guidance to predict future cerebrovascular events...
March 2017: Seminars in Vascular Surgery
https://www.readbyqxmd.com/read/28814040/training-wrist-extensor-function-and-detecting-unwanted-movement-strategies-in-an-emg-controlled-visuomotor-task
#2
Mingxing Lyu, Charles Lambelet, Daniel Woolley, Xue Zhang, Weihai Chen, Xilun Ding, Roger Gassert, Nicole Wenderoth
Stroke patients often suffer from severe upper limb paresis. Rehabilitation treatment typically targets motor impairments as early as possible, however, muscular contractions, particularly in the wrist and fingers, are often too weak to produce overt movements, making the initial phase of rehabilitation training difficult. Here we propose a new training tool whereby electromyographic (EMG) activity is measured in the wrist extensors and serves as a proxy of voluntary corticomotor drive. We used the Myo armband to develop a proportional EMG controller which allowed volunteers to perform a simple visuomotor task by modulating wrist extensor activity...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813906/the-ewrist-a-wearable-wrist-exoskeleton-with-semg-based-force-control-for-stroke-rehabilitation
#3
Charles Lambelet, Mingxing Lyu, Daniel Woolley, Roger Gassert, Nicole Wenderoth
Chronic wrist impairment is frequent following stroke and negatively impacts everyday life. Rehabilitation of the dysfunctional limb is possible but requires extensive training and motivation. Wearable training devices might offer new opportunities for rehabilitation. However, few devices are available to train wrist extension even though this movement is highly relevant for many upper limb activities of daily living. As a proof of concept, we developed the eWrist, a wearable one degree-of-freedom powered exoskeleton which supports wrist extension training...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813900/mechanical-design-of-efw-exo-ii-a-hybrid-exoskeleton-for-elbow-forearm-wrist-rehabilitation
#4
Hui Bian, Ziye Chen, Hao Wang, Tieshi Zhao
The use of rehabilitation exoskeleton has become an important means for the treatment of stroke patients. A hybrid exoskeleton named EFW Exo II is developed for the motor function rehabilitation of elbow, forearm and wrist. The EFW Exo II is based on a parallel 2-URR/RRS mechanism and a serial R mechanism. It could fit both left and right arms for the symmetrical and open structure, and the distance between the elbow and wrist could automatically adjust for different forearm length. Details of the mechanical design are introduced...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28813792/there-is-plenty-of-room-for-motor-learning-at-the-bottom-of-the-fugl-meyer-acquisition-of-a-novel-bimanual-wheelchair-skill-after-chronic-stroke-using-an-unmasking-technology
#5
Yasemin Sarigul-Klijn, Joan Lobo-Prat, Brendan W Smith, Sage Thayer, Daniel Zondervan, Vicky Chan, Oliver Stoller, David J Reinkensmeyer
Many people with a stroke have a severely paretic arm, and it is often assumed that they are unable to learn novel, skilled behaviors that incorporate use of that arm. Here, we show that a group of people with chronic stroke (n = 5, upper extremity Fugl-Meyer scores: 31, 30, 26, 22, 8) learned to use their impaired arm to propel a novel, yoked-clutch lever drive wheelchair. Over six daily training sessions, each involving about 134 training movements with their "useless" arm, the users gradually achieved a 3-fold increase in wheelchair speed on average, with a 4-6 fold increase for three of the participants...
July 2017: IEEE ... International Conference on Rehabilitation Robotics: [proceedings]
https://www.readbyqxmd.com/read/28806495/international-uptake-of-a-proven-intervention-to-reduce-death-and-dependency-in-acute-stroke-a-cross-sectional-survey-following-the-qasc-trial
#6
Sandy Middleton, Dominik Bruch, Cintia Martinez-Garduno, Simeon Dale, Maria McNamara
BACKGROUND: Uptake of proven interventions requires dedicated resources that may only result in local implementation, thus precluding international practice change. We explored international uptake through online dissemination of the fever, sugar, and swallow (FeSS) protocols from the Quality in Acute Stroke Care (QASC) trial, which showed decreased death and dependency by 15.7% 90-day poststroke. AIMS: To identify: (a) the clinical discipline of healthcare professionals who downloaded the QASC resources; (b) the purpose for downloading; (c) successful implementation of any or all the FeSS protocols; (d) barriers to implementation; and (e) associations with self-reported successful implementation...
August 14, 2017: Worldviews on Evidence-based Nursing
https://www.readbyqxmd.com/read/28805877/a-dna-bipedal-nanowalker-with-a-piston-like-expulsion-stroke
#7
Q Y Yeo, I Y Loh, S R Tee, Y H Chiang, J Cheng, M H Liu, Z S Wang
Artificial molecular walkers beyond burn-bridge designs are important for nanotechnology, but their systematic development remains difficult. Herein, we have reported a new rationally designed DNA walker-track system and experimentally verified a previously proposed general expulsion regime for implementing non-burn-bridge nanowalkers. The DNA walker has an optically powered engine motif that reversibly extends and contracts the walker via a quadruplex-duplex conformational change. The walker's extension is an energy-absorbing and force-generating process, which drives the walker's leg dissociation off-track in a piston-like expulsion stroke...
August 14, 2017: Nanoscale
https://www.readbyqxmd.com/read/28804474/a-longitudinal-electromyography-study-of-complex-movements-in-poststroke-therapy-1-heterogeneous-changes-despite-consistent-improvements-in-clinical-assessments
#8
Negin Hesam-Shariati, Terry Trinh, Angelica G Thompson-Butel, Christine T Shiner, Penelope A McNulty
Poststroke weakness on the more-affected side may arise from reduced corticospinal drive, disuse muscle atrophy, spasticity, and abnormal coordination. This study investigated changes in muscle activation patterns to understand therapy-induced improvements in motor-function in chronic stroke compared to clinical assessments and to identify the effect of motor-function level on muscle activation changes. Electromyography (EMG) was recorded from five upper limb muscles on the more-affected side of 24 patients during early and late therapy sessions of an intensive 14-day program of Wii-based Movement Therapy (WMT) and for a subset of 13 patients at 6-month follow-up...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28801111/luminescence-resonance-energy-transfer-spectroscopy-of-atp-binding-cassette-proteins
#9
REVIEW
Maria E Zoghbi, Guillermo A Altenberg
The ATP-binding cassette (ABC) superfamily includes regulatory and transport proteins. Most human ABC exporters pump substrates out of cells using energy from ATP hydrolysis. Although major advances have been made toward understanding the molecular mechanism of ABC exporters, there are still many issues unresolved. During the last few years, luminescence resonance energy transfer has been used to detect conformational changes in real time, with atomic resolution, in isolated ABC nucleotide binding domains (NBDs) and full-length ABC exporters...
August 8, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28797241/hospital-treatment-costs-and-length-of-stay-associated-with-hypertension-and-multimorbidity-after-hemorrhagic-stroke
#10
Adrian V Specogna, Tanvir C Turin, Scott B Patten, Michael D Hill
BACKGROUND: Previous studies have identified various treatment and patient characteristics that may be associated with higher hospital cost after spontaneous intracerebral hemorrhage (ICH); a devastating type of stroke. Patient morbidity is perhaps the least understood of these cost-driving factors. We describe how hypertension and other patient morbidities affect length of stay, and hospital treatment costs after ICH using primary and simulated data. We also describe the relationship between cost and length of stay within these patients...
August 10, 2017: BMC Neurology
https://www.readbyqxmd.com/read/28792893/large-stroke-high-fidelity-pzn-pt-single-crystal-stake-actuator
#11
Yu Huang, Yue Xue Xia, Dian Hua Lin, Kui Yao, Leong Chew Lim
A new piezoelectric actuator design, called "Stake" actuator, is proposed and demonstrated in this work. As an example, the stake actuator is made of four d32-mode PZN-5.5%PT single crystals, each of 25mmL × 8mmW × 0.4mmT in dimensions, bonded with the aid of polycarbonate (PC) edge guide-cum-stiffeners into a square-pipe configuration for improved bending and twisting strengths and capped with top and bottom pedestals made of 1.5 mm thick anodized aluminium. The resultant stake actuator measured 9 mm × 9 mm × 28 mm...
August 3, 2017: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
https://www.readbyqxmd.com/read/28771209/point-of-care-testing-in-acute-stroke-management-an-unmet-need-ripe-for-technological-harvest
#12
REVIEW
Dorin Harpaz, Evgeni Eltzov, Raymond C S Seet, Robert S Marks, Alfred I Y Tok
Stroke, the second highest leading cause of death, is caused by an abrupt interruption of blood to the brain. Supply of blood needs to be promptly restored to salvage brain tissues from irreversible neuronal death. Existing assessment of stroke patients is based largely on detailed clinical evaluation that is complemented by neuroimaging methods. However, emerging data point to the potential use of blood-derived biomarkers in aiding clinical decision-making especially in the diagnosis of ischemic stroke, triaging patients for acute reperfusion therapies, and in informing stroke mechanisms and prognosis...
August 3, 2017: Biosensors
https://www.readbyqxmd.com/read/28762187/the-choroid-plexus-is-a-key-cerebral-invasion-route-for-t-cells-after-stroke
#13
Gemma Llovera, Corinne Benakis, Gaby Enzmann, Ruiyao Cai, Thomas Arzberger, Alireza Ghasemigharagoz, Xiang Mao, Rainer Malik, Ivana Lazarevic, Sabine Liebscher, Ali Ertürk, Lilja Meissner, Denis Vivien, Christof Haffner, Nikolaus Plesnila, Joan Montaner, Britta Engelhardt, Arthur Liesz
Neuroinflammation contributes substantially to stroke pathophysiology. Cerebral invasion of peripheral leukocytes-particularly T cells-has been shown to be a key event promoting inflammatory tissue damage after stroke. While previous research has focused on the vascular invasion of T cells into the ischemic brain, the choroid plexus (ChP) as an alternative cerebral T-cell invasion route after stroke has not been investigated. We here report specific accumulation of T cells in the peri-infarct cortex and detection of T cells as the predominant population in the ipsilateral ChP in mice as well as in human post-stroke autopsy samples...
July 31, 2017: Acta Neuropathologica
https://www.readbyqxmd.com/read/28759536/ranking-prediction-model-using-the-competition-record-of-ladies-professional-golf-association-players
#14
Jin Seok Chae, Jin Park, Wi-Young So
The purpose of this study was to suggest a ranking prediction model using the competition record of the Ladies Professional Golf Association (LPGA) players. The top 100 players on the tour money list from the 2013-2016 US Open were analyzed in this model. Stepwise regression analysis was conducted to examine the effect of performance and independent variables (i.e., driving accuracy, green in regulation, putts per round, driving distance, percentage of sand saves, par-3 average, par-4 average, par-5 average, birdies average, and eagle average) on dependent variables (i...
July 28, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/28755816/analysis-of-the-tennis-racket-vibrations-during-forehand-drives-selection-of-the-mother-wavelet
#15
Y Blache, C Hautier, F Lefebvre, A Djordjevic, T Creveaux, I Rogowski
The time-frequency analysis of the tennis racket and hand vibrations is of great interest for discomfort and pathology prevention. This study aimed to (i) to assess the stationarity of the vibratory signal of the racket and hand and (ii) to identify the best mother wavelet to perform future time-frequency analysis, (iii) to determine if the stroke spin, racket characteristics and impact zone can influence the selection of the best mother wavelet. A total of 2364 topspin and flat forehand drives were performed by fourteen male competitive tennis players with six different rackets...
July 20, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/28737253/circulating-leukocytes-perpetuate-stroke-induced-aortic-dysfunction
#16
Shinichi Asano, Grant C O'Connell, Kent C Lemaster, Evan R DeVallance, Kayla W Branyan, James W Simpkins, Jefferson C Frisbee, Taura L Barr, Paul D Chantler
Post-stroke inflammation has been linked to poor stroke outcomes. The vascular endothelium senses and responds to circulating factors, in particular inflammatory cytokines. Although stroke associated local cerebrovascular dysfunction is well reported, the effects of a stroke on conduit artery function are not fully understood. We tested the hypothesis that stroke patients' serum triggers leukocyte-dependent aortic endothelial dysfunction that is associated with elevated cytokines levels. Total leukocytes were isolated from healthy individuals and cells were incubated in control and stroke patients' serum for 6 h...
July 24, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/28737113/micrornas-roles-in-regulating-neuroinflammation
#17
Andrew D Gaudet, Laura K Fonken, Linda R Watkins, Randy J Nelson, Phillip G Popovich
MicroRNAs (miRNAs) are small noncoding RNAs that broadly affect cellular and physiological function in all multicellular organisms. Here, the role of miRNAs in neuroinflammation is considered. miRNAs are 21- to 23-oligonucleotide RNAs that regulate translation of specific RNAs by binding to complementary regulatory RNA sequences, thereby causing mRNA degradation or sequestration. More than 5000 miRNAs likely exist in humans, and each miRNA binds an average of 200 RNAs. Specific immunomodulatory miRNAs can regulate a set of RNAs in a coordinated manner, suggesting that effective miRNA-based therapeutic manipulations for neuroinflammatory conditions may be revealed...
July 1, 2017: Neuroscientist: a Review Journal Bringing Neurobiology, Neurology and Psychiatry
https://www.readbyqxmd.com/read/28690742/what-factors-influence-the-average-length-of-stay-among-stroke-patients-in-a-nigerian-tertiary-hospital
#18
Olasheni Abdul-Afeez Somotun, Kayode Omoniyi Osungbade, Oluwaseun Oladapo Akinyemi, Taiwo Akinyode Obembe, Folashayo Ikenna Adeniji
INTRODUCTION: Increased emphasis is being laid on ensuring that health resources are efficiently utilized, especially in resource-constrained settings such as in Nigeria. One of the main indices of how efficiently a health institution is being run is Length of Stay (LOS), which is likely to be higher in chronic diseases such as stroke and diabetes. Stroke is a chronic disease that is currently on the rise in Low and Middle income countries (LMICs) who are also characterized by constraint of health resources...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/28665908/small-rural-hospitals-have-a-harder-time-achieving-success-in-continuous-quality-improvement-an-example-from-a-stroke-care-network
#19
Kelley Elkins, Lisa Bellamy, Jing Guo, Michael R Dobbs
BACKGROUND: University of Kentucky HealthCare established a Stroke Care Network (SCN) in 2008 to address the challenges of rural stroke care and improve care quality. METHODS: The SCN collects quality data from each affiliate that include volumes, mortality, length of stay, turnaround times, rt-PA door-to-needle time, 8 stroke core measures, and dysphagia screen measure. Characteristics of affiliate hospital studies include number of beds, Stroke Disease-Specific Care (DSC) certification by The Joint Commission, Appalachian designated county or not, time dedicated to stroke coordinator, submission of quality data for the calendar year, success of data, and utilization of American Heart Association's Get With the Guidelines...
July 2017: Quality Management in Health Care
https://www.readbyqxmd.com/read/28659660/robotics-in-lower-limb-rehabilitation-after-stroke
#20
REVIEW
Xue Zhang, Zan Yue, Jing Wang
With the increase in the elderly, stroke has become a common disease, often leading to motor dysfunction and even permanent disability. Lower-limb rehabilitation robots can help patients to carry out reasonable and effective training to improve the motor function of paralyzed extremity. In this paper, the developments of lower-limb rehabilitation robots in the past decades are reviewed. Specifically, we provide a classification, a comparison, and a design overview of the driving modes, training paradigm, and control strategy of the lower-limb rehabilitation robots in the reviewed literature...
2017: Behavioural Neurology
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