Abnormal development of 11-year-old boys may have language disorders, motor disorders and orofacial dysfunction. 1. Language disorders: Some adolescents with abnormal brain development may suffer from language disorders, which are mainly manifested by slurred articulation, stuttering or aphasia, in which they are able to understand the meaning of other people but are unable to speak or express themselves clearly. 2. Motor disorders: adolescents with brain dysplasia may have poor motor self-control, which is mainly manifested by inflexibility or clumsiness of the arms and legs, and in serious cases, they may not be able to walk, turn over, stand up, chew and swallow normally. 3. Oral and facial dysfunction: some dysplastic adolescents may have facial muscles and tongue muscle incoordination phenomenon, mouth closure difficulties and drooling and other phenomena. There are other aspects of abnormal development of 11-year-old boys, it is recommended to go to the hospital in a timely manner, according to the examination, under the guidance of the doctor targeted treatment.