I believe that stuttering can be defined as being a habit whereby the stutterer thinks that a word will be hard to say, which thus alerts the brain to activate a maneuver called the valsalva mechanism. We all use the valsalva mechanism, it is a maneuver to extract or push anything out of our bodies. A woman uses it to give birth, everybody uses it to defecate, urinate or vomit. Anytime the body has to ...