What are the neurological causes for speech delays?

Speech delay: Speech depends on complex interactions between different areas of the brain, so anything from prenatal infections, trauma, drugs, metabolic problems to birth injuries such as low oxygen levels or stroke, to postnatal metabolic problems, infection, trauma, seizures can potentially affect one or more areas of brain involved in speech and language. In short....Many.

Congenital and acqui: Hereditary,congenital,,from birth trauma,early childhood evaluation,and intervention mandatory,later in life ,post lingual speech,that developed from hearing deficits ,from injury,strokes ets.