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Fig. 9. Tongue length (vertical amplitude) and tongue curvature along the tongue
axis (colour code) through time (horizontal axis) for each of the first (A),
second (B) and third (C) flick clusters. Numbering of flick clusters
corresponds to those of Figs 5,
6,
7,
8. The upper boundary of each
plot represents the changing external tongue length (from the mouth to the
bifurcation point; similar to Fig.
5A). Each vertical line under the curve represents the absolute
curvature C (mm–1) indicated by the colour code (see
colour bar) along the tongue axis (mm) at a specific time (s). The numbered
series of lateral tongue shapes in the small pictograms above each curve
coincides with the numbered marks along the upper boundary. For instance, in A
at recording 2 (0.1 s), the anterior portion of the tongue shows the highest
curvature, indicated by the green area under the upper boundary. At recording
4 (0.17 s), the tongue is fairly straight, indicated by the orange area along
the vertical axis (see also the lateral view of the tongue in pictogram
4).
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