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https://www.readbyqxmd.com/read/28734242/environmental-estrogen-s-induced-swimming-behavioural-alterations-in-adult-zebrafish-danio-rerio
#1
Basavaraj B Goundadkar, Pancharatna Katti
The present study is an attempt to investigate the effects of long-term (75days) exposure to environmental estrogens (EE) on the swimming behaviour of zebrafish (Danio rerio). Adult zebrafish were exposed semi-statically to media containing commonly detected estrogenic water contaminants (EE2, DES and BPA) at a concentration (5ng/L) much lower than environmentally recorded levels. Time spent in swimming, surface preference, patterns and path of swimming were recorded (6mins) for each fish using two video cameras on day 15, 30 60 and 75...
July 11, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28731517/mental-steps-differential-activation-of-internal-pacemakers-in-motor-imagery-and-in-mental-imitation-of-gait
#2
Lucia Maria Sacheli, Laura Zapparoli, Carlo De Santis, Matteo Preti, Catia Pelosi, Nicola Ursino, Alberto Zerbi, Giuseppe Banfi, Eraldo Paulesu
Gait imagery and gait observation can boost the recovery of locomotion dysfunctions; yet, a neurologically justified rationale for their clinical application is lacking as much as a direct comparison of their neural correlates. Using functional magnetic resonance imaging, we measured the neural correlates of explicit motor imagery of gait during observation of in-motion videos shot in a park with a steady cam (Virtual Walking task). In a 2 × 2 factorial design, we assessed the modulatory effect of gait observation and of foot movement execution on the neural correlates of the Virtual Walking task: in half of the trials, the participants were asked to mentally imitate a human model shown while walking along the same route (mental imitation condition); moreover, for half of all the trials, the participants also performed rhythmic ankle dorsiflexion as a proxy for stepping movements...
July 21, 2017: Human Brain Mapping
https://www.readbyqxmd.com/read/28730871/effects-of-timing-of-signal-indicating-jump-directions-on-knee-biomechanics-in-jump-landing-jump-tasks
#3
Mitchell L Stephenson, Taylour J Hinshaw, Haley A Wadley, Qin Zhu, Margaret A Wilson, Mark Byra, Boyi Dai
A variety of the available time to react (ATR) has been utilised to study knee biomechanics during reactive jump-landing tasks. The purpose was to quantify knee kinematics and kinetics during a jump-land-jump task of three possible directions as the ATR was reduced. Thirty-four recreational athletes performed 45 trials of a jump-land-jump task, during which the direction of the second jump (lateral, medial or vertical) was indicated before they initiated the first jump, the instant they initiated the first jump, 300 ms before landing, 150 ms before landing or at the instant of landing...
July 21, 2017: Sports Biomechanics
https://www.readbyqxmd.com/read/28730345/does-fear-beget-fear-risk-mediated-habitat-selection-triggers-predator-avoidance-at-lower-trophic-levels
#4
Carmen K Blubaugh, Ivy V Widick, Ian Kaplan
Non-consumptive effects (NCEs) of predators are ubiquitous in food webs with well-detailed impacts on trophic cascades over multiple levels. However, integrating NCEs with other predator-mediated interactions, like intraguild predation, as well as context-specific habitat factors that shape top-down pressure, remains a challenge. Focusing on two common seed predators, mice (Peromyscus spp.) and carabid beetles (Coleoptera: Carabidae), we quantify trophic and behavioral consequences of predation risk and availability of refuge vegetation on both intraguild predators (mice) and intraguild prey (beetles)...
July 20, 2017: Oecologia
https://www.readbyqxmd.com/read/28730145/prokaryotic-rna-associated-to-bacterial-viability-induces-polymorphonuclear-neutrophil-activation
#5
Nahuel Rodriguez-Rodrigues, Luis A Castillo, Verónica I Landoni, Daiana Martire-Greco, M Ayelén Milillo, Paula Barrionuevo, Gabriela C Fernández
Polymorphonuclear neutrophils (PMN) are the first cellular line of antibacterial host defense. They sense pathogens through recognition of pathogen-associated molecular patterns (PAMPs) by innate pattern recognition receptors, such as Toll-like receptors (TLR). The aim of this study was to investigate whether PMN sense bacterial viability and explore which viability factor could be involved in this phenomenon. For this purpose, different functions were evaluated in isolated human PMN using live Escherichia coli (Ec) and heat-killed Ec (HK-Ec)...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28729847/effects-of-intensive-crew-training-on-individual-and-collective-characteristics-of-oar-movement-in-rowing-as-a-coxless-pair
#6
Mathieu Feigean, Mehdi R'Kiouak, Reinoud J Bootsma, Jérôme Bourbousson
This case study examined how two rowers adapted their rowing patterns following crew training as a newly formed coxless pair. The two participants were expert (double-oar) single scull-boat rowers. Performing as a crew in the coxless-pair's sweep-boat, where each rower operates a single oar, on-the-water data were collected before and after a 6-week intensive team-training program. Rowing patterns were characterized by the horizontal oar angle, oar angular velocity and linear oar-water velocity profiles during the catch (minimal oar angle) to finish (maximal oar angle) half-cycles of the propulsive water phase...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28725863/empathy-in-the-clinician-patient-relationship-the-role-of-reciprocal-adjustments-and-processes-of-synchrony
#7
Arnstein Finset, Knut Ørnes
The clinician-patient relationship is asymmetric in the sense that clinicians and patients have different roles in the medical consultation. Yet, there are qualities of reciprocity and mutuality in many clinician-patient encounters, and we suggest that such reciprocity may be related to the phenomenon of empathy. Empathy is often defined as the capacity to place oneself in another's position, but empathy may also be understood as a sequence of reciprocal turns-of talk, starting with the patient's expression of emotion, followed by the perception, vicarious experience, and empathic response by the clinician...
June 2017: Journal of patient experience
https://www.readbyqxmd.com/read/28725435/biogeophysical-and-physiological-processes-drive-movement-patterns-in-a-marine-predator
#8
Lucy A Howey, Bradley M Wetherbee, Emily R Tolentino, Mahmood S Shivji
BACKGROUND: Blue sharks (Prionace glauca) are among the most abundant and widely distributed of oceanic elasmobranchs. Millions are taken annually in pelagic longline fisheries and comprise the highest component of auctioned fin weight in the international shark fin trade. Though studies of blue sharks outnumber those of other large pelagic sharks, the species' complicated and sexually segregated life history still confound current understanding of Atlantic movement patterns. Lack of detailed information regarding movement and vertical behavior continues to limit management efforts that require such data for stock assessment and sustainable catch modeling...
2017: Movement Ecology
https://www.readbyqxmd.com/read/28724783/intra-and-intersegmental-influences-among-central-pattern-generating-networks-in-the-walking-system-of-the-stick-insect
#9
Charalampos Mantziaris, Till Bockemühl, Philip Holmes, Anke Borgmann, Silvia Daun, Ansgar Bueschges
In order to efficiently move around, animals need to coordinate their limbs. Proper, context-dependent coupling among the neural networks underlying leg movement is necessary for generating intersegmental coordination. In the slow-walking stick insect local sensory information is very important for shaping coordination. However, central coupling mechanisms among segmental central pattern generators (CPGs) may also contribute to this. Here, we analyzed the interactions between contralateral networks that drive the depressor trochanteris muscle of the legs in both isolated and interconnected deafferented thoracic ganglia of the stick insect upon application of pilocarpine, a muscarinic acetylcholine receptor agonist...
July 19, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28724782/dissecting-patterns-of-preparatory-activity-in-the-frontal-eye-fields-during-pursuit-target-selection
#10
Ramanujan T Raghavan, Mati Joshua
We investigated the composition of preparatory activity of frontal eye field (FEF) neurons in monkeys performing a pursuit target selection task. In response to the orthogonal motion of a large and a small reward target, monkeys initiated pursuit biased towards the direction of large reward target motion. FEF neurons exhibited robust preparatory activity preceding movement initiation in this task. Preparatory activity consisted of two components, ramping activity that was constant across target selection conditions and a flat offset in firing rates that signaled the target selection condition...
July 19, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28722297/assessing-guest-molecule-diffusion-in-heterogeneous-powder-samples-of-metal-organic-frameworks-through-pfg-nmr
#11
Roland Thoma, Jörg Kärger, Nader de Sousa Amadeu, Sandra Nießing, Christoph Janiak
Investigation of guest diffusion in porous metal-organic frameworks (MOFs) is of major importance since many porosity-related properties of MOFs are influenced by diffusion effects. The diffusion of dimethylsulfoxide (DMSO) in the metal-organic framework (MOF) MIL-53-NH2(Al) was investigated through pulsed-field-gradient (PFG) NMR spectroscopy. The microporous material was synthesized in small crystallites (under 500 nm), which agglomerated in a large range of particle sizes, giving a morphologically very heterogeneous sample...
July 19, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28721492/peristaltic-like-motion-of-the-human-fetal-right-ventricle-and-its-effects-on-fluid-dynamics-and-energy-dynamics
#12
Hadi Wiputra, Guat Ling Lim, Khong Chun Chua, R Nivetha, Sanah Merchant Soomar, Arijit Biwas, Citra Nurfarah Zaini Mattar, Hwa Liang Leo, Choon Hwai Yap
In both adult human and canine, the cardiac right ventricle (RV) is known to exhibit a peristaltic-like motion, where RV sinus (inflow region) contracts first and the infundibulum (outflow region) later, in a wave-like contraction motion. The delay in contraction between the sinus and infundibulum averaged at 15% of the cardiac cycle and was estimated to produce an intra-ventricular pressure difference of 15 mmHg. However, whether such a contractile motion occurs in human fetuses as well, its effects on hemodynamics remains unknown, and are the subject of the current study...
July 18, 2017: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/28721206/a-bipedal-mammalian-model-for-spinal-cord-injury-research-the-tammar-wallaby
#13
Norman R Saunders, Katarzyna M Dziegielewska, Sophie C Whish, Lyn A Hinds, Benjamin J Wheaton, Yifan Huang, Steve Henry, Mark D Habgood
Background: Most animal studies of spinal cord injury are conducted in quadrupeds, usually rodents. It is unclear to what extent functional results from such studies can be translated to bipedal species such as humans because bipedal and quadrupedal locomotion involve very different patterns of spinal control of muscle coordination. Bipedalism requires upright trunk stability and coordinated postural muscle control; it has been suggested that peripheral sensory input is less important in humans than quadrupeds for recovery of locomotion following spinal injury...
2017: F1000Research
https://www.readbyqxmd.com/read/28720523/sensory-attenuation-of-self-initiated-sounds-maps-onto-habitual-associations-between-motor-action-and-sound
#14
Nathan G Mifsud, Thomas J Whitford
Sensory attenuation refers to reduced brain responses to self-initiated sensations relative to those produced by the external world, a distinction that is vital for dynamic motor control and our sense of agency. Typically, willed vocalizations elicit larger N1 reduction of the auditory evoked potential compared to indirectly evoked sounds, such as tones generated by button-presses, which is attributed to the prediction and cancellation of incoming signals enabled by speech motor commands. However, physical confounds exist, including different stimuli and the increased motor artefact associated with mouth vs...
July 15, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28719832/expression-of-myhc-isoforms-mrna-transcripts-in-different-regions-of-the-masseter-and-medial-pterygoid-muscles-in-chimpanzees
#15
Neus Ciurana, Rosa Artells, Carmen Muñoz, Júlia Arias-Martorell, Gaëlle Bello-Hellegouarch, Alejandro Pérez-Pérez, Juan Francisco Pastor, Josep Maria Potau
OBJECTIVE: The aim of this study is to examine the expression pattern of the different myosin heavy chain (MyHC) isoforms in the masseter and medial pterygoid muscles by real time quantitative polymerase chain reaction (RT-qPCR) to obtain information at molecular level which can be related to the functional characteristics of these two muscles. DESIGN: The masseter, deep and superficial portion, and medial pterygoid muscles of five adult Pan troglodytes were dissected in order to obtain samples of the anterior and posterior regions of each portion of the masseter and of the medial pterygoid...
July 9, 2017: Archives of Oral Biology
https://www.readbyqxmd.com/read/28719661/minimizing-endpoint-variability-through-reinforcement-learning-during-reaching-movements-involving-shoulder-elbow-and-wrist
#16
David Marc Anton Mehler, Alexandra Reichenbach, Julius Klein, Jörn Diedrichsen
Reaching movements are comprised of the coordinated action across multiple joints. The human skeleton is redundant for this task because different joint configurations can lead to the same endpoint in space. How do people learn to use combinations of joints that maximize success in goal-directed motor tasks? To answer this question, we used a 3-degree-of-freedom manipulandum to measure shoulder, elbow and wrist joint movements during reaching in a plane. We tested whether a shift in the relative contribution of the wrist and elbow joints to a reaching movement could be learned by an implicit reinforcement regime...
2017: PloS One
https://www.readbyqxmd.com/read/28717653/individual-social-and-environmental-correlates-of-active-transportation-patterns-in-french-women
#17
Camille Perchoux, Christophe Enaux, Jean-Michel Oppert, Mehdi Menai, Hélène Charreire, Paul Salze, Christiane Weber, Serge Hercberg, Thierry Feuillet, Franck Hess, Célina Roda, Chantal Simon, Julie-Anne Nazare
The objectives were (1) to define physical activity (PA) and sedentary behaviors (SB) patterns in daily life contexts (work, leisure, and transportation) in French working women from NutriNet-Santé web-cohort and (2) to identify pattern(s) of active transportation and their individual, social, and environmental correlates. 23,432 participants completed two questionnaires to evaluate PA and SB in daily life contexts and individual representations of residential neighborhood and transportation modes. Hierarchical cluster analysis was performed which identified 6 distinct movement behavior patterns: (i) active occupation, high sedentary leisure, (ii) sedentary occupation, low leisure, (iii) sedentary transportation, (iv) sedentary occupation and leisure, (v) active transportation, and (vi) active leisure...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28717523/assessment-of-emotional-expressions-after-full-face-transplantation
#18
Çağdaş Topçu, Hilmi Uysal, Ömer Özkan, Özlenen Özkan, Övünç Polat, Merve Bedeloğlu, Arzu Akgül, Ela Naz Döğer, Refik Sever, Nur Ebru Barçın, Kadriye Tombak, Ömer Halil Çolak
We assessed clinical features as well as sensory and motor recoveries in 3 full-face transplantation patients. A frequency analysis was performed on facial surface electromyography data collected during 6 basic emotional expressions and 4 primary facial movements. Motor progress was assessed using the wavelet packet method by comparison against the mean results obtained from 10 healthy subjects. Analyses were conducted on 1 patient at approximately 1 year after face transplantation and at 2 years after transplantation in the remaining 2 patients...
2017: Neural Plasticity
https://www.readbyqxmd.com/read/28717156/patterned-arrangements-of-olfactory-receptor-gene-expression-in-zebrafish-are-established-by-radial-movement-of-specified-olfactory-sensory-neurons
#19
Xalid Bayramli, Yiğit Kocagöz, Uğurcan Sakizli, Stefan H Fuss
Spatial restriction of olfactory receptor (OR) gene expression in peripheral sense organs is a common phenomenon across species, suggesting that zonal OR expression somehow contributes to olfactory function. In zebrafish OR expression patterns reminiscent of zones occur as concentric domains with preferred diameters for different ORs. However, the function and the developmental origin of the pattern are unknown. Here we investigate olfactory sensory neuron (OSN) neurogenesis in the adult zebrafish olfactory epithelium (OE) to understand how the zonally organized OR pattern is established and maintained during the lifetime of the animal...
July 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28716770/data-preparation-for-west-nile-virus-agent-based-modelling-protocol-for-processing-bird-population-estimates-and-incorporating-arcmap-in-anylogic
#20
Hamid Reza Nasrinpour, Alexander A Reimer, Marcia R Friesen, Robert D McLeod
BACKGROUND: West Nile Virus (WNV) was first isolated in 1937. Since the 1950s, many outbreaks have occurred in various countries. The first appearance of infected birds in Manitoba, Canada was in 2002. OBJECTIVE: This paper describes the data preparation phase of setting up a geographic information system (GIS) simulation environment for WNV Agent-Based Modelling in Manitoba. METHODS: The main technology used in this protocol is based on AnyLogic and ArcGIS software...
July 17, 2017: JMIR Research Protocols
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