A pediatric overview of the spectrum of developmental disabilities.

The developmental disabilities are specific diagnoses on a spectrum of chronic neurologic handicaps. Complete diagnosis and habilitation planning demands awareness of the underlying continuum of cerebral dysfunction common to all the disabilities. Careful attention to this continuum can result in the recognition of critically important associated deficits. Developmental dissociation is a useful developmental phenomenon in the early diagnosis of a particular disability. Developmental deviancy is an aid in early detection of milder disabilities or associated deficits. Professionals familiar with the entire spectrum are necessary to provide optimal care for developmentally disabled children.