Stuttering is a neurodevelopmental disorder that appears most of the time in early childhood.
It is the most common fluency disorder, also called Childhood-Onset Fluency Disorder.
It is more common in boys than girls, and tends to start between the ages of two and five, at a time when speech and language are developing.
It is characterized by interruptions in the speech fluency and time patterning of speech, such as sound and syllable repetitions, sound prolongations, broken words (pauses within a word), audible or silent blocking, monosyllabic whole-word repetitions and words pronounced with an excess of physical tension. These symptoms are not attributable to any medical condition. Typically, they cause anxiety about speaking, which trigger limitations in communication, social participation, and academic or occupational performance. Stuttering has been around for centuries, and throughout history, many famous people have stuttered (e.g. Bruce Willis, Marilyn Monroe, King George VI…).