Volition and intent tends to line up with action in those that are neurotypical. A good example is the broken speech ordering disorder some people have either congenitally or due to trauma. They try and speak regularly, but the autonomic part of the brain responsible for converting that signal into verbal communication is borked.

Interestingly enough, even if it is working properly, you can still trip it up which is why we have tongue twisters and spoonerisms.