Signal inflow from upper, inner, and lower vestibular nuclei to the vermis nodulus portion.

The signal inflow also goes "doubled" into the nucleus fastigii and the vermis cortex.

This is one of many examples of how "mixed" the vestibulo and spinocerebellum with outflow from the nucleus fastigii actually are, and which explains why the division into a particular vestibulo-cerebellar part is questionable.