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https://www.readbyqxmd.com/read/28748830/a-neural-network-with-central-pattern-generators-entrained-by-sensory-feedback-controls-walking-of-a-bipedal-model
#1
Wei Li, Nicholas Stephen Szczecinski, Roger D Quinn
A neuromechanical simulation of a planar, bipedal walking robot has been developed. It is constructed as a simplified, planar musculoskeletal model of the biomechanics of the human lower body. The controller consists of a dynamic neural network with central pattern generators (CPGs) entrained by force and movement sensory feedback to generate appropriate muscle forces for walking. The CPG model is a two-level architecture, which consists of separate rhythm generator (RG) and pattern formation (PF) networks...
July 27, 2017: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/28748683/erratum-to-the-kmds-nation-study-korean-movement-disorders-society-multicenter-assessment-of-non-motor-symptoms-and-quality-of-life-in-parkinson-s-disease-nation-study-group
#2
Do Young Kwon, Seong Beom Koh, Jae Hyeok Lee, Hee Kyung Park, Han Joon Kim, Hae Won Shin, Jinyoung Youn, Kun Woo Park, Sun Ah Choi, Sang Jin Kim, Seong Min Choi, Ji Yun Park, Beom S Jeon, Ji Young Kim, Sun Ju Chung, Chong Sik Lee, Jeong Ho Park, Tae Beom Ahn, Won Chan Kim, Hyun Sook Kim, Sang Myung Cheon, Hee Tae Kim, Jee Young Lee, Ji Sun Kim, Eun Joo Kim, Jong Min Kim, Kwang Soo Lee, Joong Seok Kim, Min Jeong Kim, Jong Sam Baik, Ki Jong Park, Hee Jin Kim, Mee Young Park, Ji Hoon Kang, Sook Kun Song, Yong Duk Kim, Ji Young Yun, Ho Won Lee, Hyung Geun Oh, Jinwhan Cho, In Uk Song, Young H Sohn, Phil Hyu Lee, Jae Woo Kim
This corrects the article on p. 393 in vol. 12, PMID: 27819413.
July 2017: Journal of Clinical Neurology
https://www.readbyqxmd.com/read/28748578/exploring-quality-of-life-of-children-with-cerebral-palsy-and-intellectual-disability-what-are-the-important-domains-of-life
#3
E Davis, D Reddihough, N Murphy, A Epstein, S M Reid, A Whitehouse, K Williams, H Leonard, J Downs
BACKGROUND: Although it is estimated that half of all children with cerebral palsy also have comorbid intellectual disability, the domains of quality of life (QOL) important for these children are not well understood. The aim of this study was to identify important domains of QOL for these children and adolescents. METHODS: Due to the children's communication impairments, qualitative semi-structured interviews were conducted with 18 parents. The children (9 males) had a median age of 12 (range 7 to 17) years at interview and nearly two thirds were classified as Gross Motor Function Classification System IV or V...
July 26, 2017: Child: Care, Health and Development
https://www.readbyqxmd.com/read/28748383/is-ambient-heat-exposure-levels-associated-with-miscarriage-or-stillbirths-in-hot-regions-a-cross-sectional-study-using-survey-data-from-the-ghana-maternal-health-survey-2007
#4
Benedict Asamoah, Tord Kjellstrom, Per-Olof Östergren
It is well established that high ambient heat could cause congenital abnormalities resulting in miscarriage or stillbirth among certain species of mammals. However, this has not been systematically studied in real field settings among humans, despite the potential value of such knowledge for estimating the impact of global warming on the human species. This study sought to test the hypothesis that maternal heat exposure during pregnancy in hot regions is associated with increased prevalence of spontaneous abortions or stillbirths and to develop an analytical strategy to use existing data from maternal health surveys and existing data on historical heat levels at a geographic grid cell level...
July 26, 2017: International Journal of Biometeorology
https://www.readbyqxmd.com/read/28748303/a-mean-field-model-for-movement-induced-changes-in-the-beta-rhythm
#5
Áine Byrne, Matthew J Brookes, Stephen Coombes
In electrophysiological recordings of the brain, the transition from high amplitude to low amplitude signals are most likely caused by a change in the synchrony of underlying neuronal population firing patterns. Classic examples of such modulations are the strong stimulus-related oscillatory phenomena known as the movement related beta decrease (MRBD) and post-movement beta rebound (PMBR). A sharp decrease in neural oscillatory power is observed during movement (MRBD) followed by an increase above baseline on movement cessation (PMBR)...
July 26, 2017: Journal of Computational Neuroscience
https://www.readbyqxmd.com/read/28747451/epileptic-encephalopathy-movement-disorder-and-the-yin-and-yang-of-gnao1-function
#6
EDITORIAL
Toni S Pearson, Ingo Helbig
No abstract text is available yet for this article.
July 26, 2017: Neurology
https://www.readbyqxmd.com/read/28746775/spatial-connectivity-in-an-adult-sedentary-reef-fish-with-extended-pelagic-larval-phase
#7
L Antoni, E Saillant
Understanding the spatial scale of demographic connectivity in marine reef fishes dispersing pelagic larvae is a challenging task because of the technical difficulties associated with tagging and monitoring the movements of progeny at early life stages. Several studies highlighted a strong importance of local retention with levels of dispersal of ecological significance restricted to short distances. To date little information is available in species where pelagic dispersal lasts for long periods of time. In this work population structure and connectivity were studied in the gray triggerfish, Balistes capriscus...
July 26, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28743484/oxidative-stress-enhances-and-modulates-protein-s-nitrosation-in-smooth-muscle-cells-exposed-to-s-nitrosoglutathione
#8
E Belcastro, W Wu, I Fries-Raeth, A Corti, A Pompella, P Leroy, I Lartaud, C Gaucher
Among S-nitrosothiols showing reversible binding between NO and -SH group, S-nitrosoglutathione (GSNO) represents potential therapeutics to treat cardiovascular diseases (CVD) associated with reduced nitric oxide (NO) availability. It also induces S-nitrosation of proteins, responsible for the main endogenous storage form of NO. Although oxidative stress parallels CVD development, little is known on the ability of GSNO to restore NO supply and storage in vascular tissues under oxidative stress conditions. Aortic rat smooth muscle cells (SMC) were stressed in vitro with a free radical generator (2,2'-azobis(2-amidinopropane) dihydrochloride, AAPH)...
July 22, 2017: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/28742832/the-relationship-between-movement-speed-and-duration-during-soccer-matches
#9
Kai Roecker, Hubert Mahler, Christian Heyde, Mareike Röll, Albert Gollhofer
The relationship between the time duration of movement (t(dur)) and related maximum possible power output has been studied and modeled under many conditions. Inspired by the so-called power profiles known for discontinuous endurance sports like cycling, and the critical power concept of Monod and Scherrer, the aim of this study was to evaluate the numerical characteristics of the function between maximum horizontal movement velocity (HSpeed) and t(dur) in soccer. To evaluate this relationship, GPS data from 38 healthy soccer players and 82 game participations (≥30 min active playtime) were used to select maximum HSpeed for 21 distinct t(dur) values (between 0...
2017: PloS One
https://www.readbyqxmd.com/read/28741434/robot-applied-resistance-augments-the-effects-of-body-weight-supported-treadmill-training-on-stepping-and-synaptic-plasticity-in-a-rodent-model-of-spinal-cord-injury
#10
Erika Hinahon, Christina Estrada, Lin Tong, Deborah S Won, Ray D de Leon
BACKGROUND: The application of resistive forces has been used during body weight-supported treadmill training (BWSTT) to improve walking function after spinal cord injury (SCI). Whether this form of training actually augments the effects of BWSTT is not yet known. OBJECTIVE: To determine if robotic-applied resistance augments the effects of BWSTT using a controlled experimental design in a rodent model of SCI. METHODS: Spinally contused rats were treadmill trained using robotic resistance against horizontal (n = 9) or vertical (n = 8) hind limb movements...
July 1, 2017: Neurorehabilitation and Neural Repair
https://www.readbyqxmd.com/read/28740938/whole-body-vibration-exercise-is-well-tolerated-in-patients-with-duchenne-muscular-dystrophy-a-systematic-review
#11
Eloá Moreira-Marconi, Danubia C Sá-Caputo, Carla F Dionello, Eliane O Guedes-Aguiar, Cintia R Sousa-Gonçalves, Danielle S Morel, Laisa L Paineiras-Domingos, Patricia L Souza, Cristiane R Kütter, Rebeca G Costa-Cavalcanti, Glenda Costa, Patricia C Paiva, Claudia Figueiredo, Samuel Brandão-Sobrinho-Neto, Christina Stark, Marianne Unger, Mario Bernardo-Filho
BACKGROUND: Duchenne muscular dystrophy (DMD) is caused by a defective gene located on the X-chromosome, responsible for the production of the dystrophin protein. Complications in the musculoskeletal system have been previously described in DMD patients. Whole body vibration exercise (WBVE) is a treatment that improves musculoskeletal function in movement disorders. The aim of this study was to review the effects of WBVE on functional mobility, bone and muscle in DMD patients. MATERIALS AND METHODS: Four databases were searched...
2017: African Journal of Traditional, Complementary, and Alternative Medicines: AJTCAM
https://www.readbyqxmd.com/read/28735748/behaviorally-selective-engagement-of-short-latency-effector-pathways-by-motor-cortex
#12
Andrew Miri, Claire L Warriner, Jeffrey S Seely, Gamaleldin F Elsayed, John P Cunningham, Mark M Churchland, Thomas M Jessell
Blocking motor cortical output with lesions or pharmacological inactivation has identified movements that require motor cortex. Yet, when and how motor cortex influences muscle activity during movement execution remains unresolved. We addressed this ambiguity using measurement and perturbation of motor cortical activity together with electromyography in mice during two forelimb movements that differ in their requirement for cortical involvement. Rapid optogenetic silencing and electrical stimulation indicated that short-latency pathways linking motor cortex with spinal motor neurons are selectively activated during one behavior...
July 19, 2017: Neuron
https://www.readbyqxmd.com/read/28735100/attention-modulates-specific-motor-cortical-circuits-recruited-by-transcranial-magnetic-stimulation
#13
J L Mirdamadi, L Y Suzuki, S K Meehan
Skilled performance and acquisition is dependent upon afferent input to motor cortex. The present study used short-latency afferent inhibition (SAI) to probe how manipulation of sensory afference by attention affects different circuits projecting to pyramidal tract neurons in motor cortex. SAI was assessed in the first dorsal interosseous muscle while participants performed a low or high attention demanding visual detection task. SAI was evoked by preceding a suprathreshold transcranial magnetic stimulus with electrical stimulation of the median nerve at the wrist...
July 19, 2017: Neuroscience
https://www.readbyqxmd.com/read/28734242/environmental-estrogen-s-induced-swimming-behavioural-alterations-in-adult-zebrafish-danio-rerio
#14
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/28733596/lateral-drag-propulsion-forces-induced-by-anisotropy
#15
Igor S Nefedov, J Miguel Rubi
We predict the existence of lateral drag forces near the flat surface of an absorbing slab made of an anisotropic material. The forces originate from the fluctuations of the electromagnetic field, when the anisotropy axis of the material forms a certain angle with the surface. In this situation, the spatial spectra of the fluctuating electromagnetic fields becomes asymmetric, different for positive and negative transverse wave vectors components. Differently from the case of van der Waals interactions in which the forward-backward symmetry is broken due to the particle movement, in our case the lateral motion results merely from the anisotropy of the slab...
July 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28733412/schizosaccharomyces-japonicus-a-distinct-dimorphic-yeast-among-the-fission-yeasts
#16
Keita Aoki, Kanji Furuya, Hironori Niki
Genomic sequencing data and morphological properties demonstrate evolutionary relationships among groups of the fission yeast, Schizosaccharomyces Phylogenetically, S. japonicus is the furthest removed from other species of fission yeast. The basic characteristics of cell proliferation are shared among all fission yeast, including the process of binary fission during vegetative growth, conjugation and karyogamy with horsetail movement, mating-type switching, and sporulation. However, S. japonicus also exhibits characteristics that are unique to filamentous fungi...
July 21, 2017: Cold Spring Harbor Protocols
https://www.readbyqxmd.com/read/28733393/microscopic-observation-of-living-cells-stained-with-fluorescent-probes
#17
Haruhiko Asakawa, Da-Qiao Ding, Tokuko Haraguchi, Yasushi Hiraoka
Fluorescence imaging of living cells provides a unique opportunity to follow dynamic behavior of specific molecules under physiological conditions. In the fission yeast Schizosaccharomyces pombe, expression of a target protein genetically fused with a fluorescent protein such as the jellyfish green fluorescent protein (GFP) is widely used. In addition, fluorescent chemical reagents are also used to stain specific molecules (e.g., Hoechst 33324 to stain DNA). Specimens of S. pombe cells for live cell imaging are prepared by either of two methods: sandwiching the cells between glass coverslips and by mounting the cells on a glass-bottom culture dish...
July 21, 2017: Cold Spring Harbor Protocols
https://www.readbyqxmd.com/read/28733210/threat-effects-on-human-oculo-motor-function
#18
E N Naranjo, T W Cleworth, J H J Allum, J T Inglis, J Lea, B D Westerberg, M G Carpenter
Neuro-anatomical evidence supports the potential for threat-related factors, such as fear, anxiety and vigilance, to influence brainstem motor nuclei controlling eye movements, as well as the vestibular nuclei. However, little is known about how threat influences human ocular responses, such as eye saccades (ES), smooth pursuit eye tracking (SP), and optokinetic nystagmus (OKN), and whether these responses can be facilitated above normal baseline levels with a natural source of threat. This study was designed to examine the effects of height-induced postural threat on the gain of ES, SP and OKN responses in humans...
July 18, 2017: Neuroscience
https://www.readbyqxmd.com/read/28732763/post-exercise-cortical-depression-following-repetitive-passive-finger-movement
#19
Ryohei Otsuka, Ryoki Sasaki, Shota Tsuiki, Sho Kojima, Hideaki Onishi
This study aimed to clarify the influence of range of repetitive passive finger movement on corticospinal excitability. Thirteen healthy subjects participated in this study. Passive index finger adduction-abduction movements were performed from 15° abduction to 15° adduction, 15° abduction to 0°, 0° to 15° adduction, and 15° adduction to 30° adduction, each at 15°/s for 10minutes on separate days. Motor evoked potentials (MEPs) elicited by transcranial magnetic stimulation and M- and F-waves were measured before and after each repetitive passive index finger movement protocol to evaluate changes in corticospinal excitability...
July 18, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28731920/eye-movement-disorders-following-allogeneic-bone-marrow-transplantation-on-fk506-tacrolimus-and-ganciclovir
#20
Barbaros S Karagun, Tugana Akbas, Taner Arpaci, Bulent Antmen
FK506 (tacrolimus) is an immunosuppressive drug and more potent than cyclosporine. FK506 is widely used for immunosuppression in the prevention and treatment of graft-versus-host disease after allogeneic bone marrow transplantation and solid organ transplantation. Neurotoxicity is a recognized complication of FK506 therapy, but ptosis and weakness of eye abduction unilaterally has not been reported in association with FK506 administration to date. We discuss a 13-year-old male patient who developed ptosis and weakness of eye abduction unilaterally 90 days after transplantation with bone marrow from an unrelated donor, for acute lymphoblastic leukemia in this case report...
July 20, 2017: Journal of Pediatric Hematology/oncology
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