The role of long-range coupling in crayfish swimmeret phase-locking.

The role of long-range coupling in crayfish swimmeret phase-locking. Biol Cybern. 2018 Mar 22;: Authors: Spardy LE, Lewis TJ Abstract During forward swimming, crayfish and other long-tailed crustaceans rhythmically move four pairs of limbs called swimmerets to propel themselves through the water. This behavior is characterized by a particular stroke pattern in which the most posterior limb pair leads the rhythmic cycle and adjacent swimmerets paddle sequentially with a delay of roughly 25% of the period. The neural circuit underlying limb coordination consists of a chain of local modules, each of which controls a pair of limbs. All modules are directly coupled to one another, but the inter-module coupling strengths decrease with the distance of the connection. Prior modeling studies of the swimmeret neural circuit have included only the dominant nearest-neighbor coupling. Here, we investigate the potential modulatory role of long-range connections between modules. Numerical simulations and analytical arguments show that these connections cause decreases in the phase-differences between neighboring modules. Combined with previous results from a computational fluid dynamics model, we posit that this phenomenon might ensure that the resultant limb coordination lies within a range where propulsion is optimal. To further assess the effects of long-range coupling, we modify the model to reflect an experimental preparation where synaptic transmission from a mid...
Source: Biological Cybernetics - Category: Science Authors: Tags: Biol Cybern Source Type: research

Related Links:

Publication date: Available online 22 October 2018Source: Neurología (English Edition)Author(s): C. Avellaneda-Gómez, A. Rodríguez Campello, E. Giralt Steinhauer, A. Gómez González, M. Serra Martínez, P. de Ceballos Cerrajería, A. Zabalza de Torres, E. Cuadrado-Godia, A. Ois Santiago, J. Jiménez-Conde, J. RoquerAbstractIntroductionA considerable percentage of events initially diagnosed as ischaemic stroke have non-cerebrovascular causes; these are called stroke mimics (SM). Currently available evidence about these events is heterogeneous and comes from studies with sm...
Source: Neurologia - Category: Neurology Source Type: research
ConclusionThis review focuses on the role of various tannins in prevention and management of diabetic complications like diabetic nephropathy, diabetic neuropathy, diabetic retinopathy and diabetic cardiomyopathy. It will researchers to find some leads for the development of new cost effective therapy using dietary source for the management of diabetic complications.Graphical abstract
Source: Phytomedicine - Category: Drugs & Pharmacology Source Type: research
(MedPage Today) -- Heart attack tied to " more prolonged risk of stroke than we have thought
Source: MedPage Today Cardiovascular - Category: Cardiology Source Type: news
Publication date: Available online 22 October 2018Source: Journal of Materials Research and TechnologyAuthor(s): Omolayo M. Ikumapayi, Sunday T. Oyinbo, Ojo P. Bodunde, Sunday A. Afolalu, Imhade P. Okokpujie, Esther T. AkinlabiAbstractBackward extrusion has received several applications in the production and manufacturing sectors, most importantly in the bulk forming processes and various researchers have carried out several studies about backward extrusion processes in the time past varying from experimental, theoretical, empirical, analytical to numerical methods in order to analyze and optimize it. In this present inves...
Source: Journal of Materials Research and Technology - Category: Materials Science Source Type: research
Conditions:   Shoulder Pain;   Stroke Interventions:   Device: Exergame;   Other: Physical therapy Sponsor:   National Yang Ming University Not yet recruiting
Source: - Category: Research Source Type: clinical trials
Conditions:   ECG;   Atrial Fibrillation;   ECG Hand-held Diagnostic Tool Intervention:   Diagnostic Test: SL-ECG Sponsors:   RWTH Aachen University;   Pfizer Recruiting
Source: - Category: Research Source Type: clinical trials
Abbott‘s HeartMate 3 left ventricular assist device (LVAD) won FDA approval to be used as a destination therapy for advanced heart failure patients who are not eligible for a transplant. Previously, the device has been indicated for patients el...
Source: Medgadget - Category: Medical Devices Authors: Tags: Cardiac Surgery Cardiology Source Type: blogs
By Vladimir Popov and Jomo Kwame SundaramMOSCOW and KUALA LUMPUR, Oct 23 2018 (IPS)Although initially obscured by The Economist, among others, the sudden and unprecedented increase in Russian adult male mortality during 1992-1994 is no longer denied. Instead, the debate is now over why?Having advocated ‘shock therapy’, a ‘big bang’, ‘sudden’ or rapid post-Soviet transition, Jeffrey Sachs and others have claimed that the sudden collapse in Russian adult male life expectancy was due to a sudden increase in alcohol consumption, playing into popular foreign images of vodka-binging Russian me...
Source: IPS Inter Press Service - Health - Category: International Medicine & Public Health Authors: Tags: Development & Aid Economy & Trade Europe Global Governance Headlines Health TerraViva United Nations Source Type: news
Guisen Lin, Caiyu Zhuang, Zhiwei Shen, Gang Xiao, Yanzi Chen, Yuanyu Shen, Xiaodan Zong, Renhua Wu
Source: Frontiers in Neurology - Category: Neurology Source Type: research
Increasing Stroke Incidence Among Marijuana UsersMedscape Medical News
Source: Medscape Cardiology Headlines - Category: Cardiology Tags: Neurology & Neurosurgery News Source Type: news
More News: Science | Stroke | Study