There is a direct relationship between the linguistic process and the motor process used by the speaker. When the speaker concentrates on internal speech, there is a tendency to try to control articulation. Rather than allowing the articulators to function on a completely automatic mode, the speaker exerts some degree of control on the movement of the articulators in an attempt to form specific words or sounds. A mental link between the articulators and the phonetic plan is created. We also see that there as an inverse relationship between the production of voicing and the movement of the articulators in the speech production of people who stutter.
Fluent speakers produce voicing as the basic element in overt speech production.
Once the voice is produced, the task of the articulators is to shape the voice. For people who stutter the major focus is on shaping the articulators. The production of voicing becomes a secondary function. Due to the connection between the musculature of the articulators and the larynx, certain types of stimulation to the articulators result in an inability to produce vocal fold vibrations. Sometimes the speaker tries to set the vocal folds into vibration by pushing increased air pressure through the glottis.