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Fig. 3. Mathematical model of unc-23 behavior. (A) Representative track of
a simulated unc-23 mutant in a radial gradient. Note that the
simulated worm had a clockwise turning bias (7 deg. s–1) and
made a counterclockwise spiral, as do real unc-23 mutants
(Fig. 1Bii). The gradient peak
is indicated by the plus sign. Color represents time (see color scale).
Pirouette initiation events are indicated by orange crosses superimposed on
the magnified track within the inset. (B) Population behavior of simulated
unc-23 worms in a radial gradient. The track of one simulated worm is
highlighted in black; all other tracks are gray (N=50). Each
simulated worm had a right-handed turning bias and made a left-handed spiral.
The gradient peak is indicated by intersection of dotted lines. Simulations in
A and B were started near the asterisks.
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