scholarly journals The cortical face network of the prosopagnosic patient PS with fast periodic stimulation in fMRI

Cortex ◽  
2019 ◽  
Vol 119 ◽  
pp. 528-542 ◽  
Author(s):  
Xiaoqing Gao ◽  
Quoc C. Vuong ◽  
Bruno Rossion
Keyword(s):  
Periodic Stimulation

Entrainment and Annihilation of Reentrant Excitation in a Periodically Stimulated Ring of Excitable Media

1997 ◽  
Vol 36 (04/05) ◽  
pp. 290-293
Author(s):  
L. Glass ◽  
T. Nomura
Keyword(s):  
Cardiac Arrhythmias ◽  
Initial Phase ◽  
Human Heart ◽  
Periodic Wave ◽  
Excitable Media ◽  
One Dimensional ◽  
Clinical Observations ◽  
Periodic Stimulation ◽  
Reentrant Excitation ◽  
Stimulation Of

Abstract:Excitable media, such as nerve, heart and the Belousov-Zhabo- tinsky reaction, exhibit a large excursion from equilibrium in response to a small but finite perturbation. Assuming a one-dimensional ring geometry of sufficient length, excitable media support a periodic wave of circulation. As in the periodic stimulation of oscillations in ordinary differential equations, the effects of periodic stimuli of the periodically circulating wave can be described by a one-dimensional Poincaré map. Depending on the period and intensity of the stimulus as well as its initial phase, either entrainment or termination of the original circulating wave is observed. These phenomena are directly related to clinical observations concerning periodic stimulation of a class of cardiac arrhythmias caused by reentrant wave propagation in the human heart.

ON TWO-DIMENSIONAL DYNAMICAL SYSTEMS ASSOCIATED WITH MEMBRANE KINETICS UNDERLYING CARDIAC ARRHYTHMIAS

2009 ◽  
Vol 19 (05) ◽  
pp. 1709-1732 ◽  
Author(s):  
B. M. BAKER ◽  
M. E. KIDWELL ◽  
R. P. KLINE ◽  
I. POPOVICI
Keyword(s):  
Dynamical Behavior ◽  
Basins Of Attraction ◽  
Two Dimensional ◽  
Stimulus Period ◽  
Smooth Maps ◽  
Periodic Stimulation ◽  
Piecewise Smooth Maps ◽  
Dimensional Version ◽  
Bifurcation Law ◽  
The One

We study the orbits, stability and coexistence of orbits in the two-dimensional dynamical system introduced by Kline and Baker to model cardiac rhythmic response to periodic stimulation — as a function of (a) kinetic parameters (two amplitudes, two rate constants) and (b) stimulus period. The original paper focused mostly on the one-dimensional version of this model (one amplitude, one rate constant), whose orbits, stability properties, and bifurcations were analyzed via the theory of skew-tent (hence unimodal) maps; the principal family of orbits were so-called "n-escalators", with n a positive integer. The two-dimensional analog (motivated by experimental results) has led to the current study of continuous, piecewise smooth maps of a polygonal planar region into itself, whose dynamical behavior includes the coexistence of stable orbits. Our principal results show (1) how the amplitude parameters control which escalators can come into existence, (2) escalator bifurcation behavior as the stimulus period is lowered — leading to a "1/n bifurcation law", and (3) the existence of basins of attraction via the coexistence of three orbits (two of them stable, one unstable) at the first (largest stimulus period) bifurcation. We consider the latter result our most important, as it is conjectured to be connected with arrhythmia.

scholarly journals Temporal sampling, resetting, and adaptation orchestrate gradient sensing in sperm

2012 ◽  
Vol 198 (6) ◽  
pp. 1075-1091 ◽  
Author(s):  
Nachiket D. Kashikar ◽  
Luis Alvarez ◽  
Reinhard Seifert ◽  
Ingo Gregor ◽  
Oliver Jäckle ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Single Molecule ◽  
Temporal Pattern ◽  
Chemical Gradient ◽  
Gradient Sensing ◽  
Temporal Sampling ◽  
Sperm Sample ◽  
Periodic Stimulation ◽  
Minimal Gradient ◽  
Sea Urchin Sperm

Sperm, navigating in a chemical gradient, are exposed to a periodic stream of chemoattractant molecules. The periodic stimulation entrains Ca2+ oscillations that control looping steering responses. It is not known how sperm sample chemoattractant molecules during periodic stimulation and adjust their sensitivity. We report that sea urchin sperm sampled molecules for 0.2–0.6 s before a Ca2+ response was produced. Additional molecules delivered during a Ca2+ response reset the cell by causing a pronounced Ca2+ drop that terminated the response; this reset was followed by a new Ca2+ rise. After stimulation, sperm adapted their sensitivity following the Weber–Fechner law. Taking into account the single-molecule sensitivity, we estimate that sperm can register a minimal gradient of 0.8 fM/µm and be attracted from as far away as 4.7 mm. Many microorganisms sense stimulus gradients along periodic paths to translate a spatial distribution of the stimulus into a temporal pattern of the cell response. Orchestration of temporal sampling, resetting, and adaptation might control gradient sensing in such organisms as well.

On the generation of spiral and scroll waves by periodic stimulation of excitable media in the presence of obstacles of minimum size

2017 ◽  
Vol 99 ◽  
pp. 162-170 ◽  
Author(s):  
Daniel Olmos-Liceaga ◽  
Humberto Ocejo-Monge
Keyword(s):  
Excitable Media ◽  
Minimum Size ◽  
Periodic Stimulation ◽  
Stimulation Of ◽  
Scroll Waves

scholarly journals The Relationship Between the Benton Face Recognition Test and Electrophysiological Unfamiliar Face Individuation Response as Revealed by Fast Periodic Stimulation

Perception ◽  
2020 ◽  
Vol 49 (2) ◽  
pp. 210-221 ◽  
Author(s):  
Milena Dzhelyova ◽  
Christine Schiltz ◽  
Bruno Rossion
Keyword(s):  
Face Recognition ◽  
Recognition Test ◽  
Periodic Stimulation ◽  
Unfamiliar Face ◽  
The Relationship

Integer multiple spiking in neuronal pacemakers without external periodic stimulation

2001 ◽  
Vol 285 (1-2) ◽  
pp. 63-68 ◽  
Author(s):  
Huaguang Gu ◽  
Wei Ren ◽  
Qishao Lu ◽  
Shunguang Wu ◽  
Minghao Yang ◽  
...  
Keyword(s):  
Integer Multiple ◽  
Periodic Stimulation

scholarly journals Controlling Seizure-Like Events by Perturbing Ion Concentration Dynamics with Periodic Stimulation

PLoS ONE ◽  
2013 ◽  
Vol 8 (9) ◽  
pp. e73820 ◽  
Author(s):  
Jeremy A. Owen ◽  
Ernest Barreto ◽  
John R. Cressman
Keyword(s):  
Ion Concentration ◽  
Periodic Stimulation

SubHopf/Fold-Cycle Bursting in the Hindmarsh—Rose Neuronal Model with Periodic Stimulation

2011 ◽  
Vol 28 (9) ◽  
pp. 090201 ◽  
Author(s):  
Ying Ji ◽  
Qin-Sheng Bi
Keyword(s):  
Neuronal Model ◽  
Periodic Stimulation
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