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https://www.readbyqxmd.com/read/28644812/a-self-adaptive-capacitive-compensation-technique-for-body-channel-communication
#1
Jingna Mao, Huazhong Yang, Yong Lian, Bo Zhao
In wireless body area network, capacitive-coupling body channel communication (CC-BCC) has the potential to attain better energy efficiency over conventional wireless communication schemes. The CC-BCC scheme utilizes the human body as the forward signal transmission medium, reducing the path loss in wireless body-centric communications. However, the backward path is formed by the coupling capacitance between the ground electrodes (GEs) of transmitter (Tx) and receiver (Rx), which increases the path loss and results in a body posture dependent backward impedance...
June 20, 2017: IEEE Transactions on Biomedical Circuits and Systems
https://www.readbyqxmd.com/read/28642285/state-dependent-tms-reveals-representation-of-affective-body-movements-in-the-anterior-intraparietal-cortex
#2
Noemi Mazzoni, Christianne Jacobs, Paola Venuti, Juha Silvanto, Luigi Cattaneo
In humans, recognition of others' actions involves a cortical network that comprises, among other cortical regions, the posterior superior temporal sulcus (pSTS), where biological motion is coded and the anterior intraparietal suclus (aIPS), where movement information is elaborated in terms of meaningful goal-directed actions. This action observation system (AOS) is thought to encode neutral voluntary actions, and possibly some aspects of affective motor repertoire, but the role of the AOS' areas in processing affective kinematic information has never been examined...
June 22, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/28639707/dressings-and-topical-agents-for-treating-pressure-ulcers
#3
REVIEW
Maggie J Westby, Jo C Dumville, Marta O Soares, Nikki Stubbs, Gill Norman
BACKGROUND: Pressure ulcers, also known as bedsores, decubitus ulcers and pressure injuries, are localised areas of injury to the skin or the underlying tissue, or both. Dressings are widely used to treat pressure ulcers and promote healing, and there are many options to choose from including alginate, hydrocolloid and protease-modulating dressings. Topical agents have also been used as alternatives to dressings in order to promote healing.A clear and current overview of all the evidence is required to facilitate decision-making regarding the use of dressings or topical agents for the treatment of pressure ulcers...
June 22, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28630911/the-genomic-mosaicism-of-hybrid-speciation
#4
Tore O Elgvin, Cassandra N Trier, Ole K Tørresen, Ingerid J Hagen, Sigbjørn Lien, Alexander J Nederbragt, Mark Ravinet, Henrik Jensen, Glenn-Peter Sætre
Hybridization is widespread in nature and, in some instances, can result in the formation of a new hybrid species. We investigate the genetic foundation of this poorly understood process through whole-genome analysis of the hybrid Italian sparrow and its progenitors. We find overall balanced yet heterogeneous levels of contribution from each parent species throughout the hybrid genome and identify areas of novel divergence in the hybrid species exhibiting signals consistent with balancing selection. High-divergence areas are disproportionately located on the Z chromosome and overrepresented in gene networks relating to key traits separating the focal species, which are likely involved in reproductive barriers and/or species-specific adaptations...
June 2017: Science Advances
https://www.readbyqxmd.com/read/28623004/variable-methodological-quality-and-use-found-in-systematic-reviews-referenced-in-stemi-clinical-practice-guidelines
#5
Jared Scott, Benjamin Howard, Philip Sinnett, Michael Schiesel, Jana Baker, Patrick Henderson, Matt Vassar
BACKGROUND: The objective of this study was to assess the methodological quality and clarity of reporting of the systematic reviews (SRs) supporting clinical practice guideline (CPG) recommendations in the management of ST-elevation myocardial infarction (STEMI) across international CPGs. METHODS: We searched 13 guideline clearinghouses including the National Guideline Clearinghouse and Guidelines International Network (GIN). To meet inclusion criteria CPGs must be pertinent to the management of STEMI, endorsed by a governing body or national organization, and written in English...
June 14, 2017: American Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28607373/intrinsic-functional-connectivity-reduces-after-first-time-exposure-to-short-term-gravitational-alterations-induced-by-parabolic-flight
#6
Angelique Van Ombergen, Floris L Wuyts, Ben Jeurissen, Jan Sijbers, Floris Vanhevel, Steven Jillings, Paul M Parizel, Stefan Sunaert, Paul H Van de Heyning, Vincent Dousset, Steven Laureys, Athena Demertzi
Spaceflight severely impacts the human body. However, little is known about how gravity and gravitational alterations affect the human brain. Here, we aimed at measuring the effects of acute exposure to gravity transitions. We exposed 28 naïve participants to repetitive alterations between normal, hyper- and microgravity induced by a parabolic flight (PF) and measured functional MRI connectivity changes. Scans were acquired before and after the PF. To mitigate motion sickness, PF participants received scopolamine prior to PF...
June 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28602556/attacks-against-health-care-in-syria-2015-16-results-from-a-real-time-reporting-tool
#7
Mohamed Elamein, Hilary Bower, Camilo Valderrama, Daher Zedan, Hazem Rihawi, Khaled Almilaji, Mohammed Abdelhafeez, Nabil Tabbal, Naser Almhawish, Sophie Maes, Alaa AbouZeid
BACKGROUND: Collecting credible data on violence against health services, health workers, and patients in war zones is a massive challenge, but crucial to understanding the extent to which international humanitarian law is being breached. We describe a new system used mainly in areas of Syria with a substantial presence of armed opposition groups since November, 2015, to detect and verify attacks on health-care services and describe their effect. METHODS: All Turkey health cluster organisations with a physical presence in Syria, either through deployed and locally employed staff, were asked to participate in the Monitoring Violence against Health Care (MVH) alert network...
June 7, 2017: Lancet
https://www.readbyqxmd.com/read/28600001/at-least-eighty-percent-of-brain-grey-matter-is-modifiable-by-physical-activity-a-review-study
#8
REVIEW
Seyed Amir Hossein Batouli, Valiallah Saba
The human brain is plastic, i.e. it can show structural changes in response to the altered environment. Physical activity (PA) is a lifestyle factor which has significant associations with the structural and functional aspects of the human brain, as well as with the mind and body health. Many studies have reported regional/global brain volume increments due to exercising; however, a map which shows the overall extent of the influences of PAs on brain structure is not available. In this study, we collected all the reports on brain structural alterations in association with PA in healthy humans, and next, a brain map of the extent of these effects is provided...
June 7, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28578481/the-association-of-air-temperature-with-cardiac-arrhythmias
#9
Viktor Čulić
The body response to meteorological influences may activate pathophysiological mechanisms facilitating the occurrence of cardiac arrhythmias in susceptible patients. Putative underlying mechanisms include changes in systemic vascular resistance and blood pressure, as well as a network of proinflammatory and procoagulant processes. Such a chain reaction probably occurs within the time window of several hours, so use of daily average values of meteorological elements do not seem appropriate for investigation in this area...
June 3, 2017: International Journal of Biometeorology
https://www.readbyqxmd.com/read/28574455/a-lifetime-maximization-relay-selection-scheme-in-wireless-body-area-networks
#10
Yu Zhang, Bing Zhang, Shi Zhang
Network Lifetime is one of the most important metrics in Wireless Body Area Networks (WBANs). In this paper, a relay selection scheme is proposed under the topology constrains specified in the IEEE 802.15.6 standard to maximize the lifetime of WBANs through formulating and solving an optimization problem where relay selection of each node acts as optimization variable. Considering the diversity of the sensor nodes in WBANs, the optimization problem takes not only energy consumption rate but also energy difference among sensor nodes into account to improve the network lifetime performance...
June 2, 2017: Sensors
https://www.readbyqxmd.com/read/28566139/arithmetic-in-the-developing-brain-a-review-of-brain-imaging-studies
#11
REVIEW
Lien Peters, Bert De Smedt
Brain imaging studies on academic achievement offer an exciting window on experience-dependent cortical plasticity, as they allow us to understand how developing brains change when children acquire culturally transmitted skills. This contribution focuses on the learning of arithmetic, which is quintessential to mathematical development. The nascent body of brain imaging studies reveals that arithmetic recruits a large set of interconnected areas, including prefrontal, posterior parietal, occipito-temporal and hippocampal areas...
May 17, 2017: Developmental Cognitive Neuroscience
https://www.readbyqxmd.com/read/28553214/from-thirst-to-satiety-the-anterior-mid-cingulate-cortex-and-right-posterior-insula-indicate-dynamic-changes-in-incentive-value
#12
Christoph A Becker, Tobias Flaisch, Britta Renner, Harald T Schupp
The cingulate cortex and insula are among the neural structures whose activations have been modulated in functional imaging studies examining discrete states of thirst and drinking to satiation. Building upon these findings, the present study aimed to identify neural structures that change their pattern of activation elicited by water held in the mouth in relation to the internal body state, i.e., proportional to continuous water consumption. Accordingly, participants in a thirsty state were scanned while receiving increments of water until satiety was reached...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28547127/the-relationship-between-outcome-prediction-and-cognitive-fatigue-a-convergence-of-paradigms
#13
G R Wylie, H M Genova, J DeLuca, E Dobryakova
Cognitive fatigue is common after strenuous cognitive effort. A large body of literature has implicated a network of brain areas in fatigue, including the basal ganglia and cortical areas including ventro-medal prefrontal cortex and anterior cingulate cortex (ACC). Furthermore, the ACC has been shown to be involved in processes such as error and conflict monitoring, outcome prediction, and effort processing. Thus, the ACC appears to be one common denominator between clinical work on fatigue and research on outcome prediction and effort...
May 25, 2017: Cognitive, Affective & Behavioral Neuroscience
https://www.readbyqxmd.com/read/28546862/block-sparsity-based-joint-compressed-sensing-recovery-of-multi-channel-ecg-signals
#14
Anurag Singh, Samarendra Dandapat
In recent years, compressed sensing (CS) has emerged as an effective alternative to conventional wavelet based data compression techniques. This is due to its simple and energy-efficient data reduction procedure, which makes it suitable for resource-constrained wireless body area network (WBAN)-enabled electrocardiogram (ECG) telemonitoring applications. Both spatial and temporal correlations exist simultaneously in multi-channel ECG (MECG) signals. Exploitation of both types of correlations is very important in CS-based ECG telemonitoring systems for better performance...
April 2017: Healthcare Technology Letters
https://www.readbyqxmd.com/read/28541910/an-investigation-on-ground-electrodes-of-capacitive-coupling-human-body-communication
#15
Jingna Mao, Huazhong Yang, Bo Zhao
Utilizing the body surface as the signal transmission medium, capacitive coupling human body communication (CC-HBC) can achieve a much higher energy efficiency than conventional wireless communications in future wireless body area network (WBAN) applications. Under the CC-HBC scheme, the body surface serves as the forward signal path, whereas the backward path is formed by the capacitive coupling between the ground electrodes (GEs) of transmitter (TX) and receiver (RX). So the type of communication benefits from a low forward loss, while the backward loss depending on the GE coupling strength dominates the total transmission loss...
May 24, 2017: IEEE Transactions on Biomedical Circuits and Systems
https://www.readbyqxmd.com/read/28541909/dual-band-dual-mode-button-antenna-for-on-body-and-off-body-communications
#16
Xiu Yin Zhang, Hang Wong, Te Mo, Yun Fei Cao
A dual-band dual-mode button antenna for body centric communications is presented. At the lower band, a spiral inverted-F antenna is designed with omnidirectional radiation pattern for on-body communication. At the upper band, the high-order mode of the inverted-F antenna is utilized together with a metal reflector to realize broadside radiation for off-body communication. For demonstration, a prototype is implemented. The measured peak gains on the phantom at the lower and upper bands are -0.6 and 4.3 dBi, respectively...
May 24, 2017: IEEE Transactions on Biomedical Circuits and Systems
https://www.readbyqxmd.com/read/28541907/compact-highly-efficient-and-fully-flexible-circularly-polarized-antenna-enabled-by-silver-nanowires-for-wireless-body-area-networks
#17
Zhi Hao Jiang, Zheng Cui, Taiwei Yue, Yong Zhu, Douglas H Werner
A compact and flexible circularly polarized (CP) wearable antenna is introduced for wireless body-area network systems at the 2.4 GHz industrial, scientific, and medical (ISM) band, which is implemented by employing a low-loss composite of polydimethylsiloxane (PDMS) and silver nanowires (AgNWs). The circularly polarized radiation is enabled by placing a planar linearly polarized loop monopole above a finite anisotropic artificial ground plane. By truncating the anisotropic artificial ground plane to contain only 2 by 2 unit cells, an integrated antenna with a compact form factor of 0...
May 23, 2017: IEEE Transactions on Biomedical Circuits and Systems
https://www.readbyqxmd.com/read/28538517/greater-corticostriatal-activation-associated-with-facial-motor-imagery-compared-with-motor-execution-a-functional-mri-study
#18
Meena M Makary, Seulgi Eun, Kyungmo Park
Motor imagery (MI) relies on conscious mental simulation of a motor act without overt motor output and can promote motor skill acquisition and facilitate rehabilitation for patients with stroke or neurological conditions. Although a plethora of neuroimaging studies have investigated the neural network of MI regarding different body parts, exploration of the neural correlates to facial MI remains warranted. Here, we used functional MRI with a large cohort of 41 participants who underwent motor execution (ME) and MI runs of mouth-stretching tasks...
July 5, 2017: Neuroreport
https://www.readbyqxmd.com/read/28535820/predicted-body-weight-relationships-for-protective-ventilation-unisex-proposals-from-pre-term-through-to-adult
#19
Dion C Martin, Glenn N Richards
BACKGROUND: The lung-protective ventilation bundle has been shown to reduce mortality in adult acute respiratory distress syndrome (ARDS). This concept has expanded to other areas of acute adult ventilation and is recommended for pediatric ventilation. A component of lung-protective ventilation relies on a prediction of lean body weight from height. The predicted body weight (PBW) relationship employed in the ARDS Network trial is considered valid only for adults, with a dedicated formula required for each sex...
May 23, 2017: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/28533402/behavioral-and-neural-correlates-to-multisensory-detection-of-sick-humans
#20
Christina Regenbogen, John Axelsson, Julie Lasselin, Danja K Porada, Tina Sundelin, Moa G Peter, Mats Lekander, Johan N Lundström, Mats J Olsson
Throughout human evolution, infectious diseases have been a primary cause of death. Detection of subtle cues indicating sickness and avoidance of sick conspecifics would therefore be an adaptive way of coping with an environment fraught with pathogens. This study determines how humans perceive and integrate early cues of sickness in conspecifics sampled just hours after the induction of immune system activation, and the underlying neural mechanisms for this detection. In a double-blind placebo-controlled crossover design, the immune system in 22 sample donors was transiently activated with an endotoxin injection [lipopolysaccharide (LPS)]...
June 13, 2017: Proceedings of the National Academy of Sciences of the United States of America
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