Abstract
Lingual development and behavioral changes after cochlear implantation were studied in 6 children. Caselis a male with congenital deafness and implanted at 2 years and 5 months old. Case 2 is a female with congenital rubella syndrome and implanted at 3 years and 7 months old. Case 3 is a male with congenital deafness syndrome and implanted at 7 years and 9 months old. Case 4 is a female with congenital cochlear malformation (common-cavity type) and implanted at 4 years and 8 months old. Case 5 is a female with progressive deafness and implanted at 6 years and 2 months old. Case 6 is a female with congenital deafness and implanted at 1 year and 11 months old. Their pre-post changes of the lingual development and the developmental index were studied with lingual-social area of a shin-pan K shiki developmental examination, and their behavioral changes were also examined.
Every child demonstrated well lingual development. But their developmental indexes did not reached at normal level. Behavioral changes showed that every child but one became able to hear environmental sounds after 3 months, and speech sounds after 6 months. We concluded that cochlear implantation is useful for all, but they have been in development, so we have to follow them up more long-term.
