Is there a little voice in your head that speaks to you?

In the 2014 Inner Voice movie, Joy (voice of Amy Poehler) and Sadness (voice of Phyllis Smith) catch a ride on the Train of Thought. — Disney/Pixar

In theaters for a few weeks now, the animated movie Inside Out 2, gives a voice to the emotions that race through our minds.

But for some people, these little inner voices are completely silent.