Phonological disorders involve abnormal speech development that is noticed by comparing a child's speech to others of the same age. Boys are more commonly affected than girls. These disorders can range from difficulty producing certain sounds to speech that is incomprehensible. Treatment involves speech therapy to teach correct production of sounds and sequences. Untreated phonological disorders can affect social and educational development. The brain areas like Broca's area and Wernicke's area are involved in language development.