Variations of the time constants τ<i>_s</i> and τ<i>_θ</i> have different effects on the activity pattern.

<p>A. Relative change in AP (red, diamonds) and SP (blue, stars) as τ<i>_s</i> (i) or τ<i>_θ</i> (ii) is varied. For comparison, the linear change in both AP and SP when τ<i>_θ</i> and τ<i>_s</i> are varied together by the same factor is shown (iii, τ<i>_s</i> & τ<i>_θ</i>). B. Variations of the duty cycle with τ<i>_s</i> (i), τ<i>_θ</i> (ii) and τ<i>_s</i> & τ<i>_θ</i> (iii).