adjustments to the model. Future work could consider testing the proposed search mechanisms in this adjusted model (b) In our implementation of the CMP model, we worked in the low noise limit at $\delta = 0$ where new re-entrant circuits could not form after the tissue had been initialised with one or two artificial circuits in the tissue. This was done for computational simplicity and is a small source of noise compared to the effects of stochastic coupling on wavefront dynamics. The exception is that non-zero $\delta$ does allow for small local fluctuations on short timescales as shown by part (d) of Fig. \[fig:rotorform\]. In a simple re-entrant circuit searching algorithm, these fluctuations can occasionally be mistaken for circuits. However, these fluctuations dissipate after a single cycle of electrical activity. Therefore, a full implementation of the search algorithm could easily account for these fluctuations by recording electrical dynamics over two or more periods. This implementation of the CMP model only analysed tissues with simple, two fibre re-entrant circuits typically formed in the real CMP model from a single dysfunctional cell. In the full CMP model, re-entrant circuits can form consisting of multiple fibres and multiple dysfunctional cells. On a local 