Histograms of the centroid velocity of each fitted component extracted in the north (right) and south (left). The line style indicates the number of velocity components fitted along each line of sight: single (solid), double (dashed), and triple or more (dotted). The centroid velocity is shown transformed into the galaxy-plane as in Fig. 5. Overlaid colored rectangles show the predictions of the model for the spiral, the bar in scenario 1, and the bar in scenario 2 as in Fig. 5.