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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/28644398/a-novel-wearable-forehead-eog-measurement-system-for-human-computer-interfaces
#2
Jeong Heo, Heenam Yoon, Kwang Suk Park
Amyotrophic lateral sclerosis (ALS) patients whose voluntary muscles are paralyzed commonly communicate with the outside world using eye movement. There have been many efforts to support this method of communication by tracking or detecting eye movement. An electrooculogram (EOG), an electro-physiological signal, is generated by eye movements and can be measured with electrodes placed around the eye. In this study, we proposed a new practical electrode position on the forehead to measure EOG signals, and we developed a wearable forehead EOG measurement system for use in Human Computer/Machine interfaces (HCIs/HMIs)...
June 23, 2017: Sensors
https://www.readbyqxmd.com/read/28644395/optical-tracking-and-digital-quantification-of-beating-behavior-in-bioengineered-human-cardiac-organoids
#3
Mahesh Devarasetty, Steven Forsythe, Thomas D Shupe, Shay Soker, Colin E Bishop, Anthony Atala, Aleksander Skardal
Organoid and organ-on-a-chip technologies are rapidly advancing towards deployment for drug and toxicology screening applications. Liver and cardiac toxicities account for the majority of drug candidate failures in human trials. Liver toxicity generally produces liver cell death, while cardiac toxicity causes adverse changes in heart beat kinetics. In traditional 2D cultures, beating kinetics can be measured by electrode arrays, but in some 3D constructs, quantifying beating kinetics can be more challenging...
June 23, 2017: Biosensors
https://www.readbyqxmd.com/read/28643922/speed-of-human-tooth-movement-in-growers-and-non-growers-selection-of-applied-stress-matters
#4
L R Iwasaki, Y Liu, H Liu, J C Nickel
OBJECTIVES: To test that the speed of tooth translation is not affected by stress magnitude and growth status. SETTING AND SAMPLE POPULATION: Advanced Education Orthodontic clinics at the Universities of Nebraska Medical Center and Missouri-Kansas City. Forty-six consenting subjects with orthodontic treatment plans involving maxillary first premolar extractions. MATERIALS AND METHODS: This randomized split-mouth study used segmental mechanics with definitive posterior anchorage and individual vertical-loop maxillary canine retraction appliances and measured three-dimensional tooth movements...
June 2017: Orthodontics & Craniofacial Research
https://www.readbyqxmd.com/read/28643918/effect-of-cyclical-forces-on-orthodontic-tooth-movement-from%C3%A2-animals-to-humans
#5
REVIEW
F Uribe, E Dutra, T Chandhoke
Vibration as a non-invasive method is currently available for clinical use with the potential to accelerate the rate of tooth movement in orthodontics. The aim of this review was to evaluate the basic science and clinical literature on the effects of vibration on the axial and appendicular skeleton including the craniofacial bone. Vibration as a dynamic load consisting of high oscillatory forces of low magnitude has shown osteogenic and anti-catabolic effects on bone. These effects have been observed in the craniofacial skeleton including the alveolar bone as increases in sutural width and alveolar bone formation...
June 2017: Orthodontics & Craniofacial Research
https://www.readbyqxmd.com/read/28643903/resolving-differences-between-animal-models-for-expedited-orthodontic-tooth-movement
#6
A Y Ibrahim, S Gudhimella, S N Pandruvada, S S Huja
OBJECTIVE: To highlight differences in commonly used animal models of orthodontic tooth movement (OTM). METHODS: Narrative review. RESULTS: A critical review of the literature on animal models has become increasingly important in the last decade as methods to increase the rate of tooth movement have been intensely sought. We provide a review focusing on the rodent and canine models for expedited OTM and describe the challenges in extrapolation of the results to the clinical practice of orthodontics...
June 2017: Orthodontics & Craniofacial Research
https://www.readbyqxmd.com/read/28643392/retroviruses-and-microtubule-associated-motor-proteins
#7
REVIEW
Gloria Arriagada
Retroviruses are obligate intracellular parasites of eukaryotic cells. After reverse transcription, the viral DNA contained in the preintegration complex (PIC) is delivered to the nucleus of the host cell, where it integrates. Before reaching the nucleus, the incoming particle and the PIC must travel throughout the cytoplasm. Likewise the newly synthesized viral proteins and viral particles must transit the cytoplasm during exit. The cytoplasm is a crowded environment and simple diffusion is difficult. Therefore, viruses have evolved to utilize the cellular mechanisms of movement through the cytoplasm, where microtubules are the roads, and the ATP dependent motors dynein and kinesin are the vehicles for retrograde and anterograde trafficking...
June 22, 2017: Cellular Microbiology
https://www.readbyqxmd.com/read/28642285/state-dependent-tms-reveals-representation-of-affective-body-movements-in-the-anterior-intraparietal-cortex
#8
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/28642245/a-reporter-mouse-model-for-in-vivo-tracing-and-in-vitro-molecular-studies-of-melanocytic-lineage-cells-and-their-diseases
#9
Melissa Crawford, Valerie Leclerc, Lina Dagnino
Alterations in melanocytic lineage cells give rise to a plethora of distinct human diseases, including neurocristopathies, cutaneous pigmentation disorders, loss of vision and hearing, as well as melanoma. Understanding the ontogeny and biology of melanocytic cells, as well as how they interact with their surrounding environment, are key steps in the development of therapies for diseases that involve this cell lineage. Efforts to culture and characterize primary melanocytes from normal or genetically engineered mouse models have at times yielded contrasting observations...
June 22, 2017: Biology Open
https://www.readbyqxmd.com/read/28641264/a-single-channel-eog-based-speller
#10
Shenghong He, Yuanqing Li
Electrooculography (EOG) signals, which can be used to infer the intentions of a user based on eye movements, are widely used in human-computer interface (HCI) systems. Most existing EOG-based HCI systems incorporate a limited number of commands because they generally associate different commands with a few different types of eye movements, such as looking up, down, left, or right. This paper presents a novel single-channel EOG-based HCI that allows users to spell asynchronously by only blinking. Forty buttons corresponding to 40 characters displayed to the user via a graphical user interface (GUI) are intensified in a random order...
June 15, 2017: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/28641235/computer-aided-training-sensorimotor-cortex-functions-in-humans-before-the-upper-limb-transplantation-using-virtual-reality-and-sensory-feedback
#11
Marek Kurzynski, Anna Jaskolska, Jaroslaw Marusiak, Andrzej Wolczowski, Przemyslaw Bierut, Lukasz Szumowski, Jerzy Witkowski, Katarzyna Kisiel-Sajewicz
One of the biggest problems of upper limb transplantation is lack of certainty as to whether a patient will be able to control voluntary movements of transplanted hands. Based on findings of the recent research on brain cortex plasticity, a premise can be drawn that mental training supported with visual and sensory feedback can cause structural and functional reorganization of the sensorimotor cortex, which leads to recovery of function associated with the control of movements performed by the upper limbs. In this study, authors - based on the above observations - propose the computer-aided training (CAT) system, which generating visual and sensory stimuli, should enhance the effectiveness of mental training applied to humans before upper limb transplantation...
June 15, 2017: Computers in Biology and Medicine
https://www.readbyqxmd.com/read/28641201/pelvic-and-hip-kinematics-during-single-leg-drop-landing-are-altered-in-sports-participants-with-long-standing-groin-pain-a-cross-sectional-study
#12
L Janse van Rensburg, M Dare, Q Louw, L Crous, J Cockroft, L Williams, B Olivier
OBJECTIVES: The aim of this study was to determine the differences in three-dimensional pelvic and hip kinematics during a single-leg drop-landing task in active sports participants with long-standing groin pain compared to healthy matched controls. DESIGN: This was a descriptive study incorporating a cross-sectional design. SETTING: The study was conducted at the Unit for Human Movement Analysis, Stellenbosch University, South Africa. PARTICIPANTS: The study sample was comprised of 20 male club level soccer, rugby, running and cycling participants between the ages of 18 and 55 years...
May 12, 2017: Physical Therapy in Sport
https://www.readbyqxmd.com/read/28640918/identifying-key-demographic-parameters-of-a-small-island-associated-population-of-indo-pacific-bottlenose-dolphins-reunion-indian-ocean
#13
Violaine Dulau, Vanessa Estrade, Jacques Fayan
Photo-identification surveys of Indo-Pacific bottlenose dolphins were conducted from 2009 to 2014 off Reunion Island (55°E33'/21°S07'), in the Indian Ocean. Robust Design models were applied to produce the most reliable estimate of population abundance and survival rate, while accounting for temporary emigration from the survey area (west coast). The sampling scheme consisted of a five-month (June-October) sampling period in each year of the study. The overall population size at Reunion was estimated to be 72 individuals (SE = 6...
2017: PloS One
https://www.readbyqxmd.com/read/28639825/sync-or-separate-no-compelling-evidence-for-unintentional-interpersonal-coordination-between-usain-bolt-and-tyson-gay-on-the-100-meter-world-record-race
#14
Frank Blikslager, Harjo J de Poel
In a recent observation article in Journal of Experimental Psychology: Human Perception and Performance (JEP:HPP; Varlet & Richardson, 2015) the 100-m sprint final of the World Championship in Athletics in Berlin of 2009 (i.e., the current world record race) was analyzed. That study reported occurrence of spontaneous, unintentional interpersonal synchronization between Usain Bolt and Tyson Gay, the respective winner and runner-up of that race. In the present commentary article, however, we argue that the results and conclusion of that study cannot be warranted because of methodological shortcomings...
July 2017: Journal of Experimental Psychology. Human Perception and Performance
https://www.readbyqxmd.com/read/28638335/quantification-of-head-movement-predictability-and-implications-for-suppression-of-vestibular-input-during-locomotion
#15
Paul R MacNeilage, Stefan Glasauer
Achieved motor movement can be estimated using both sensory and motor signals. The value of motor signals for estimating movement should depend critically on the stereotypy or predictability of the resulting actions. As predictability increases, motor signals become more reliable indicators of achieved movement, so weight attributed to sensory signals should decrease accordingly. Here we describe a method to quantify this predictability for head movement during human locomotion by measuring head motion with an inertial measurement unit (IMU), and calculating the variance explained by the mean movement over one stride, i...
2017: Frontiers in Computational Neuroscience
https://www.readbyqxmd.com/read/28638324/stochastic-signatures-of-involuntary-head-micro-movements-can-be-used-to-classify-females-of-abide-into-different-subtypes-of-neurodevelopmental-disorders
#16
Elizabeth B Torres, Sejal Mistry, Carla Caballero, Caroline P Whyatt
Background: The approximate 5:1 male to female ratio in clinical detection of Autism Spectrum Disorder (ASD) prevents research from characterizing the female phenotype. Current open access repositories [such as those in the Autism Brain Imaging Data Exchange (ABIDE I-II)] contain large numbers of females to help begin providing a new characterization of females on the autistic spectrum. Here we introduce new methods to integrate data in a scale-free manner from continuous biophysical rhythms of the nervous systems and discrete (ordinal) observational scores...
2017: Frontiers in Integrative Neuroscience
https://www.readbyqxmd.com/read/28635954/phenotypic-extremes-of-bicd2-opathies-from-lethal-congenital-muscular-atrophy-with-arthrogryposis-to-asymptomatic-with-subclinical-features
#17
Markus Storbeck, Beate Horsberg Eriksen, Andreas Unger, Irmgard Hölker, Ingvild Aukrust, Lilian A Martínez-Carrera, Wolfgang A Linke, Andreas Ferbert, Raoul Heller, Matthias Vorgerd, Gunnar Houge, Brunhilde Wirth
Heterozygous variants in BICD cargo adapter 2 (BICD2) cause autosomal dominant spinal muscular atrophy, lower extremity-predominant 2 (SMALED2). The disease is usually characterized by a benign or slowly progressive, congenital or early onset muscle weakness and atrophy that mainly affects the lower extremities, although some affected individuals show involvement of the arms and the shoulder girdle. Here we report unusual extremes of BICD2-related diseases: A severe form of congenital muscular atrophy with arthrogryposis multiplex, respiratory insufficiency and lethality within four months...
June 21, 2017: European Journal of Human Genetics: EJHG
https://www.readbyqxmd.com/read/28635615/topography-on-a-subcellular-scale-modulates-cellular-adhesions-and-actin-stress-fiber-dynamics-in-tumor-associated-fibroblasts
#18
Mikheil Azatov, Xiaoyu Sun, Alexandra Suberi, John T Fourkas, Arpita Upadhyaya
Cells can sense and adapt to mechanical properties of their environment. The local geometry of the extracellular matrix, such as its topography, has been shown to modulate cell morphology, migration, and proliferation. Here we investigate the effect of micro/nanotopography on the morphology and cytoskeletal dynamics of human pancreatic tumor-associated fibroblast cells (TAFs). We use arrays of parallel nanoridges with variable spacings on a subcellular scale to investigate the response of TAFs to the topography of their environment...
June 21, 2017: Physical Biology
https://www.readbyqxmd.com/read/28632099/how-working-with-a-helpful-versus-less-helpful-confederate-influences-joint-action-in-a-pegboard-task
#19
Sara Scharoun, Adam Mintz, Cheryl M Glazebrook, Eric Roy, Dave Gonzalez
Actors change their movement strategies to complement a coactor's movements when performing cooperative tasks. To further investigate this topic, the authors designed a pegboard task whereby a participant-confederate pair worked together to move a peg from one side of the board to the other. The authors examined how the experience of working with a helpful confederate versus less helpful confederate influenced the participant's movement behavior. Results provide evidence that participants change their movement behaviors in response to the actions of the confederate...
March 1, 2017: Journal of Motor Behavior
https://www.readbyqxmd.com/read/28631859/determining-the-drivers-of-population-structure-in-a-highly-urbanized-landscape-to-inform-conservation-planning
#20
Henri A Thomassen, Ryan J Harrigan, Kathleen Semple Delaney, Seth P D Riley, Laurel E K Serieys, Katherine Pease, Robert K Wayne, Thomas B Smith
Understanding the environmental contributors to population structure is of paramount importance for conservation in urbanized environments. We used spatially-explicit models to determine genetic population structure under current and future environmental conditions across a highly fragmented, human-dominated environment in Southern California to assess the effects of natural ecological variation and urbanization. We focused on seven common species with diverse habitat requirements, home range sizes, and dispersal abilities...
June 20, 2017: Conservation Biology: the Journal of the Society for Conservation Biology
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