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Fig. 4. Temporal profiles of Tb and B in conditions
representing a large homeotherm (A), a homeotherm weighing a little less than
50 g (B) and a 10 g homeotherm (C). Time in arbitrary units. Solid lines,
Tb; broken lines, B. Notice the asymptotically stable node
in the large homeotherm condition, the asymptotically stable focus (damped
oscillations) in the
50 g condition, and the centre (sustained
oscillations) in the 10 g condition. Simulations were done in MatLab 6.1 and
Simulink.