Imagery for Diagrams

Is thinking always imagistic? If ‘imagistic’ means ‘based on mental images’, the answer is presumably yes, because one cannot think without mental images. This is the view taken by Johnson [15] who claims that ,image schemata… play a central role in all meaning and understanding as well as in all reasoning - (p. ix). Presmeg [23] concludes from this that ,we are all visualizers in the sense that we all use imagery constantly - (p. 311). But are all mental images images of visual information? What about music - does it create mental images?