Before we stutter. What in our subconscious - puts limits in trying to speak? In your own words

Before we stutter. What in our subconscious - puts limits in trying to speak? In your own words The “inner judge” that stops authentic self-expression: What subconscious processes (that we have at least some control over) limit our speech initiation prior to a stuttering moment? What subconscious mechanisms (that we have at least some control over) are limiting our speech execution? And I'm not referring to reactions, but the processes and mechanisms that precede those reactions, in your own words?