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https://www.readbyqxmd.com/read/29777676/cognitive-effects-of-rhythmic-auditory-stimulation-in-parkinson-s-disease-a-p300-study
#1
Juan Lei, Nadine Conradi, Cornelius Abel, Stefan Frisch, Alla Brodski-Guerniero, Marcel Hildner, Christian A Kell, Jochen Kaiser, Maren Schmidt-Kassow
Rhythmic auditory stimulation (RAS) may compensate dysfunctions of the basal ganglia (BG), involved with intrinsic evaluation of temporal intervals and action initiation or continuation. In the cognitive domain, RAS containing periodically presented tones facilitates young healthy participants' attention allocation to anticipated time points, indicated by better performance and larger P300 amplitudes to periodic compared to random stimuli. Additionally, active auditory-motor synchronization (AMS) leads to a more precise temporal encoding of stimuli via embodied timing encoding than stimulus presentation adapted to the participants' actual movements...
May 16, 2018: Brain Research
https://www.readbyqxmd.com/read/29777564/the-importance-of-non-regional-lymph-nodes-in-assigning-risk-in-primary-metastatic-prostate-cancer
#2
Adnan Ali, Alexander Hoyle, Hitesh Mistry, Noel W Clarke
OBJECTIVE: To determine the prognostic relevance of non-regional lymph nodes (NRLN) metastases presenting synchronously with bone metastases in metastatic prostate cancer (mPCa) for guiding treatment decisions based on oligometastatic definitions. PATIENTS AND METHODS: Patients diagnosed with mPCa between 2004 and 2013 were identified from the surveillance, epidemiology and end-results (SEER) database and were grouped by metastatic sites into only NRLN, only bone, bone + NRLN and other sites ± bone/NRLN metastases...
May 19, 2018: BJU International
https://www.readbyqxmd.com/read/29777477/cardiac-and-gait-rhythms-in-healthy-younger-and-older-adults-during-treadmill-walking-tasks
#3
Matthew W Wittstein, Joseph M Starobin, Randy J Schmitz, Sandra J Shulz, Francis Jay Haran, Christopher K Rhea
BACKGROUND: Aging and pathology result in changes in the dynamics of several physiological subsystems. Often, these changes are concurrent, altering the dynamics between subsystems. Cardiac and gait rhythms are one example in which patterns change during physical activity. AIMS: The purpose of this research is to simultaneously monitor changes in cardiac and gait rhythms when participants complete various treadmill walking tasks-normal speed, fast speed, and while synchronizing steps with a blinking metronome...
May 17, 2018: Aging Clinical and Experimental Research
https://www.readbyqxmd.com/read/29776683/septic-arthritis-of-the-sternoclavicular-joint-a-unique-late-complication-after-tracheostomy
#4
Kayvon F Sharif, Fred M Baik, Ameya A Jategaonkar, Azita S Khorsandi, Mark L Urken
BACKGROUND: Septic arthritis of the sternoclavicular joint is a rare infection associated with significant morbidity and mortality. Several risk factors for septic arthritis have been reported in the literature ranging from immunodeficiency to intravenous drug use. CASE PRESENTATION: A 63-year-old male previously treated for synchronous squamous cell carcinomas of the epiglottis and floor of mouth presented with tenderness and swelling of the sternoclavicular joint two months after tracheostomy decannulation...
May 15, 2018: American Journal of Otolaryngology
https://www.readbyqxmd.com/read/29776605/g-protein-coupled-receptor-resensitization-paradigms
#5
Manveen K Gupta, Maradumane L Mohan, Sathyamangla V Naga Prasad
Cellular responses to extracellular milieu/environment are driven by cell surface receptors that transmit the signal into the cells resulting in a synchronized and measured response. The ability to provide such exquisite responses to changes in external environment is mediated by the tight and yet, deliberate regulation of cell surface receptor function. In this regard, the seven transmembrane G protein-coupled receptors (GPCRs) are the largest family of cell surface receptors that regulate responses like cardiac contractility, vision, and olfaction including platelet activation...
2018: International Review of Cell and Molecular Biology
https://www.readbyqxmd.com/read/29776160/universal-principles-governing-multiple-random-searchers-on-complex-networks-the-logarithmic-growth-pattern-and-the-harmonic-law
#6
Tongfeng Weng, Jie Zhang, Michael Small, Bahareh Harandizadeh, Pan Hui
We propose a unified framework to evaluate and quantify the search time of multiple random searchers traversing independently and concurrently on complex networks. We find that the intriguing behaviors of multiple random searchers are governed by two basic principles-the logarithmic growth pattern and the harmonic law. Specifically, the logarithmic growth pattern characterizes how the search time increases with the number of targets, while the harmonic law explores how the search time of multiple random searchers varies relative to that needed by individual searchers...
March 2018: Physical Review. E
https://www.readbyqxmd.com/read/29776158/clusters-in-nonsmooth-oscillator-networks
#7
Rachel Nicks, Lucie Chambon, Stephen Coombes
For coupled oscillator networks with Laplacian coupling, the master stability function (MSF) has proven a particularly powerful tool for assessing the stability of the synchronous state. Using tools from group theory, this approach has recently been extended to treat more general cluster states. However, the MSF and its generalizations require the determination of a set of Floquet multipliers from variational equations obtained by linearization around a periodic orbit. Since closed form solutions for periodic orbits are invariably hard to come by, the framework is often explored using numerical techniques...
March 2018: Physical Review. E
https://www.readbyqxmd.com/read/29776148/asymmetry-in-cilia-configuration-induces-hydrodynamic-phase-locking
#8
Keiji Okumura, Seiya Nishikawa, Toshihiro Omori, Takuji Ishikawa, Atsuko Takamatsu
To gain insight into the nature of biological synchronization at the microscopic scale, we here investigate the hydrodynamic synchronization between conically rotating objects termed nodal cilia. A mechanical model of three rotating cilia is proposed with consideration of variation in their shapes and geometrical arrangement. We conduct numerical estimations of both near-field and far-field hydrodynamic interactions, and we apply a conventional averaging method for weakly coupled oscillators. In the nonidentical case, the three cilia showed stable locked-phase differences around ±π/2...
March 2018: Physical Review. E
https://www.readbyqxmd.com/read/29776135/transition-to-collective-oscillations-in-finite-kuramoto-ensembles
#9
Franziska Peter, Arkady Pikovsky
We present an alternative approach to finite-size effects around the synchronization transition in the standard Kuramoto model. Our main focus lies on the conditions under which a collective oscillatory mode is well defined. For this purpose, the minimal value of the amplitude of the complex Kuramoto order parameter appears as a proper indicator. The dependence of this minimum on coupling strength varies due to sampling variations and correlates with the sample kurtosis of the natural frequency distribution...
March 2018: Physical Review. E
https://www.readbyqxmd.com/read/29776099/distinct-collective-states-due-to-trade-off-between-attractive-and-repulsive-couplings
#10
K Sathiyadevi, V K Chandrasekar, D V Senthilkumar, M Lakshmanan
We investigate the effect of repulsive coupling together with an attractive coupling in a network of nonlocally coupled oscillators. To understand the complex interaction between these two couplings we introduce a control parameter in the repulsive coupling which plays a crucial role in inducing distinct complex collective patterns. In particular, we show the emergence of various cluster chimera death states through a dynamically distinct transition route, namely the oscillatory cluster state and coherent oscillation death state as a function of the repulsive coupling in the presence of the attractive coupling...
March 2018: Physical Review. E
https://www.readbyqxmd.com/read/29776043/reynolds-number-dependent-dynamical-transitions-on-hydrodynamic-synchronization-modes-of-externally-driven-colloids
#11
Norihiro Oyama, Kosuke Teshigawara, John Jairo Molina, Ryoichi Yamamoto, Takashi Taniguchi
The collective dynamics of externally driven N_{p}-colloidal systems (1≤N_{p}≤4) in a confined viscous fluid have been investigated using three-dimensional direct numerical simulations with fully resolved hydrodynamics. The dynamical modes of collective particle motion are studied by changing the particle Reynolds number as determined by the strength of the external driving force and the confining wall distance. For a system with N_{p}=3, we found that at a critical Reynolds number a dynamical mode transition occurs from the doublet-singlet mode to the triplet mode, which has not been reported experimentally...
March 2018: Physical Review. E
https://www.readbyqxmd.com/read/29775401/electroencephalographic-signals-during-anesthesia-recorded-from-surface-and-depth-electrodes
#12
Ville Jäntti, Tuomo Ylinen, Narayan Puthanmadam Subramaniyam, Kotoe Kamata, Arvi Yli-Hankala, Pasi Kauppinen, Eila Sonkajärvi
Purpose - Anesthesiologists have increasingly started to use EEG based indexes to estimate the level and type of unconsciousness. However, the physiology and biophysics are poorly understood in anesthesiological literature. Methods - EEG was recorded from electrodes on the surface of head, including scalp, as well as DBS (deep brain stimulation) electrodes implanted deep in the brain. Mathematical modeling with a realistic head model was performed to create illustrative images of the sensitivity of electrode montages...
May 18, 2018: International Journal of Radiation Biology
https://www.readbyqxmd.com/read/29775391/understanding-physical-mechanism-of-low-level-microwave-radiation-effect
#13
Hiie Hinrikus, Maie Bachmann, Jaanus Lass
PURPOSE: This topic review aims to explain the mechanism of low-level microwave radiation effect based on published research results. The review presents the analysis of theoretical and experimental results comprising underlying physics and derived biological-physiological consequences supported by experimental data. CONCLUSIONS: The rotation of dipolar molecules causes polarization of dielectric medium and restructuring of hydrogen bonds between these molecules...
May 18, 2018: International Journal of Radiation Biology
https://www.readbyqxmd.com/read/29775133/preservation-of-electrophysiological-functional-connectivity-after-partial-corpus-callosotomy-case-report
#14
Kaitlyn Casimo, Fabio Grassia, Sandra L Poliachik, Edward Novotny, Andrew Poliakov, Jeffrey G Ojemann
Prior studies of functional connectivity following callosotomy have disagreed in the observed effects on interhemispheric functional connectivity. These connectivity studies, in multiple electrophysiological methods and functional MRI, have found conflicting reductions in connectivity or patterns resembling typical individuals. The authors examined a case of partial anterior corpus callosum connection, where pairs of bilateral electrocorticographic electrodes had been placed over homologous regions in the left and right hemispheres...
May 18, 2018: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/29774813/robotic-laparoendoscopic-single-site-pyeloplasty-and-nephrectomy-chapter
#15
Igor Sorokin, Jeffrey A Cadeddu
Robotic laparoendoscopic single site (RLESS) for upper tract procedures is safe and feasible in the correctly selected patient. An ideal candidate is young, has a low body mass index, and is undergoing surgery for benign indications. For RLESS procedures, we utilize a GelPOINT® access platform for "single-port" placement and ports are configured in a diamond shape. Five millimeter EndoWrist® robotic instruments are placed under direct vision. Range of motion is increased by utilizing the chopstick technique...
May 2018: Journal of Endourology
https://www.readbyqxmd.com/read/29774390/-oligometastases-in-gastric-and-esophageal-cancer-current-clinical-trials-and-surgical-concepts
#16
REVIEW
S Beckert, A Königsrainer
There is an increasing role of surgery even in metastatic tumor stages. In colorectal cancer patients with limited metastases, complete cytoreduction is able to offer long-term survival in synchronic as well as metachronic situations. In tumors of the upper gastrointestinal tract (UGIT), however, the impact of surgery in metastatic disease remains to be clarified. Even though several retrospective studies suggest prolonged survival, surgery is not recommended by the current German S3 guidelines for tumors of the UGIT...
May 17, 2018: Der Chirurg; Zeitschrift Für Alle Gebiete der Operativen Medizen
https://www.readbyqxmd.com/read/29774315/retrospective-analysis-of-patients-with-synchronous-primary-breast-and-thyroid-carcinoma
#17
İlker Murat Arer, Hakan Yabanoğlu, Murat Kuş, Aydıncan Akdur, Tevfik Avcı
Objective: Breast and thyroid cancers are commonly encountered malignancies. Increased risk of breast cancer in follow-up period of thyroid cancer or vice versa has been reported. However, they have some associations, synchronous presentation of these tumors is rare. We presented 12 patients diagnosed as breast and thyroid cancer and treated at the same time. Materials and Methods: Mastectomy and thyroidectomy were performed in 19 patients at the same time. 7 patients were excluded because of benign thyroid pathology...
April 2018: European Journal of Breast Health
https://www.readbyqxmd.com/read/29774073/polypyrrole-chitosan-conductive-biomaterial-synchronizes-cardiomyocyte-contraction-and-improves-myocardial-electrical-impulse-propagation
#18
Zhi Cui, Nathan C Ni, Jun Wu, Guo-Qing Du, Sheng He, Terrence M Yau, Richard D Weisel, Hsing-Wen Sung, Ren-Ke Li
Background: The post-myocardial infarction (MI) scar interrupts electrical impulse propagation and delays regional contraction, which contributes to ventricular dysfunction. We investigated the potential of an injectable conductive biomaterial to restore scar tissue conductivity and re-establish synchronous ventricular contraction. Methods: A conductive biomaterial was generated by conjugating conductive polypyrrole (PPY) onto chitosan (CHI) backbones. Trypan blue staining of neonatal rat cardiomyocytes (CMs) cultured on biomaterials was used to evaluate the biocompatibility of the conductive biomaterials...
2018: Theranostics
https://www.readbyqxmd.com/read/29773968/solving-routing-problems-with-pairwise-synchronization-constraints
#19
Sophie N Parragh, Karl F Doerner
Pairwise route synchronization constraints are commonly encountered in the field of service technician routing and scheduling and in the area of mobile care. Pairwise route synchronization refers to constraints that require that two technicians or home care workers visit the same location at exactly the same time. We consider constraints of this type in the context of the well-known vehicle routing problem with time windows and a generic service technician routing and scheduling problem. Different approaches for dealing with the problem of pairwise route synchronization are compared and several ways of integrating a synchronization component into a metaheuristic algorithm tailored to the original problems are analyzed...
2018: Central European Journal of Operations Research
https://www.readbyqxmd.com/read/29773793/dynamically-induced-cascading-failures-in-power-grids
#20
Benjamin Schäfer, Dirk Witthaut, Marc Timme, Vito Latora
Reliable functioning of infrastructure networks is essential for our modern society. Cascading failures are the cause of most large-scale network outages. Although cascading failures often exhibit dynamical transients, the modeling of cascades has so far mainly focused on the analysis of sequences of steady states. In this article, we focus on electrical transmission networks and introduce a framework that takes into account both the event-based nature of cascades and the essentials of the network dynamics...
May 17, 2018: Nature Communications
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