scholarly journals Spatial Symmetry Breaking Determines Spiral Wave Rotation Direction in Simplified Cardiac Systems

2015 ◽  
Vol 108 (2) ◽  
pp. 312a-313a
Author(s):  
Thomas Quail
Keyword(s):  
Symmetry Breaking ◽  
Spiral Wave ◽  
Spatial Symmetry ◽  
Rotation Direction ◽  
Wave Rotation

Spatial Symmetry Breaking Determines Spiral Wave Chirality

2014 ◽  
Vol 113 (15) ◽  
Author(s):  
Thomas Quail ◽  
Alvin Shrier ◽  
Leon Glass
Keyword(s):  
Symmetry Breaking ◽  
Spiral Wave ◽  
Spatial Symmetry

Spontaneous spatial symmetry breaking in passive nonlinear optical feedback systems

1988 ◽  
Vol 38 (4) ◽  
pp. 2005-2010 ◽  
Author(s):  
A. Ouarzeddini ◽  
H. Adachihara ◽  
J. V. Moloney
Keyword(s):  
Symmetry Breaking ◽  
Nonlinear Optical ◽  
Optical Feedback ◽  
Feedback Systems ◽  
Spatial Symmetry

Spatial symmetry breaking in rapidly rotating convective spherical shells

1995 ◽  
Vol 22 (10) ◽  
pp. 1265-1268 ◽  
Author(s):  
Keke Zhang ◽  
Gerald Schubert
Keyword(s):  
Symmetry Breaking ◽  
Spherical Shells ◽  
Spatial Symmetry

scholarly journals RhoA- and Ran-induced antagonistic forces underlie symmetry breaking and spindle rotation in mouse oocytes

2020 ◽  
Author(s):  
Benoit Dehapiot ◽  
Raphaël Clément ◽  
Anne Bourdais ◽  
Sébastien Huet ◽  
Guillaume Halet
Keyword(s):  
Symmetry Breaking ◽  
Polar Body ◽  
Break Symmetry ◽  
Ring Closure ◽  
Rotation Direction ◽  
Mouse Oocytes ◽  
Polar Bodies ◽  
Spindle Rotation ◽  
Dependent Polarization ◽  
Rhoa Signaling

AbstractMammalian oocyte meiotic divisions are highly asymmetric and produce a large haploid gamete and two small polar bodies. This relies on the ability of the cell to break symmetry and position its spindle close to the cortex before the anaphase occurs. In metaphase II arrested mouse oocytes, the spindle is actively maintained close and parallel to the cortex, until the fertilization triggers the sister chromatids segregation and the rotation of the spindle. The latter must indeed reorient perpendicular to the cortex to enable the cytokinesis ring closure at the base of the polar body. However, the mechanisms underlying symmetry breaking and spindle rotation have remained elusive. In this study, we show that the spindle rotation results from two antagonistic forces. First, an inward contraction of the cytokinesis furrow dependent on RhoA signaling and second, an outward attraction exerted on both lots of chromatids by a RanGTP dependent polarization of the actomyosin cortex. By combining live segmentation and tracking with numerical modelling, we demonstrate that this configuration becomes unstable as the ingression progresses. This leads to spontaneous symmetry breaking, which implies that neither the rotation direction nor the lot of chromatids that eventually gets discarded are biologically predetermined.

SPONTANEOUS SPATIAL SYMMETRY BREAKING IN PASSIVE OPTICAL FEEDBACK SYSTEMS

1988 ◽  
Vol 49 (C2) ◽  
pp. C2-455-C2-458 ◽  
Author(s):  
A. OUARZEDDINI ◽  
H. ADACHIHARA ◽  
J. V. MOLONEY ◽  
D. W. McLAUGHLIN ◽  
A. C. NEWELL
Keyword(s):  
Symmetry Breaking ◽  
Optical Feedback ◽  
Feedback Systems ◽  
Spatial Symmetry

scholarly journals Automating Symmetry-Breaking Calculations

2004 ◽  
Vol 7 ◽  
pp. 101-119 ◽  
Author(s):  
P. C. Matthews
Keyword(s):  
Group Theory ◽  
Symmetry Breaking ◽  
Symmetry Group ◽  
Irreducible Representations ◽  
Symmetry Groups ◽  
Periodic Patterns ◽  
Alternating Groups ◽  
Spatial Symmetry

AbstractThe process of classifying possible symmetry-breaking bifurcations requires a computation involving the subgroups and irreducible representations of the original symmetry group. It is shown how this calculation can be automated using a group theory package such as GAP. This enables a number of new results to be obtained for larger symmetry groups, where manual computation is impractical. Examples of symmetric and alternating groups are given, and the method is also applied to the spatial symmetry-breaking of periodic patterns observed in experiments.

Experimental observation of bound states in the continuum generated by spatial symmetry breaking

2021 ◽  
Author(s):  
Taiki Yoda ◽  
Yuto Moritake ◽  
Masaaki Ono ◽  
Eiichi Kuramochi ◽  
Masaya Notomi
Keyword(s):  
Symmetry Breaking ◽  
Experimental Observation ◽  
Bound States ◽  
Spatial Symmetry ◽  
The Continuum
Sign in / Sign up

Export Citation Format

Share Document