Control of spatial orientation and lifetime of scroll rings in excitable media

Michael Vinson, Sergey Mironov, Scott Mulvey and Arkady Pertsov
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Michael Vinson: SUNY Health Sciences Center
Sergey Mironov: SUNY Health Sciences Center
Scott Mulvey: SUNY Health Sciences Center
Arkady Pertsov: SUNY Health Sciences Center

Nature, 1997, vol. 386, issue 6624, 477-480

Abstract: Abstract Excitable media, which range from autocatalytic chemical systems1–3 to biological cells and tissues4–7, can maintain organized structures in the form of rotating spiral waves of excitation8–11. The dynamics of spiral waves in two-dimensional systems have been shown to be susceptible to control by external fields (such as electric, thermal and optical)12–14. In three dimensions, the analogues of spiral waves are scroll waves9,15,16. Here we show that an external field—a temperature gradient—can be used to control a particular class of scroll waves called scroll rings. The gradient allows scroll rings to be precisely oriented in space, and their spontaneous shrinkage to be accelerated, decelerated or even reversed (so that the ring expands). The temperature gradient also influences the lifetimes of the scroll rings. We suggest that these dynamics are likely to be generic to other types of field gradients and other excitable media.

Date: 1997
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DOI: 10.1038/386477a0

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