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  • Title: [The acquisition of language through finger spelling in a child with auditory agnosia (author's transl)].
    Author: Sagawa S, Kaga K, Kaga M, Tanaka Y.
    Journal: No To Shinkei; 1982 May; 34(5):485-91. PubMed ID: 7104108.
    Abstract:
    A child with auditory agnosia for verbal and nonverbal sounds was reported. He was born without difficulty and his early development was normal. At the age of 14 months, he suffered from herpes simplex encephalitis and fell in a trance. Soon after he recovered from the illness, he found not to pay any attention to sounds and not to speak any words. He was referred to Teikyo University hospital at 2.5 years of age for the hearing measurement. The average threshold of conditioned orientation reflex audiometry at 500, 1000 and 2000 Hz were 85 dB, while the threshold of auditory brain stem response was 15 dB which is normal. CT scan demonstrated bilateral lesions of superior temporal gyrus. Neurological examination revealed nothing particular except the troubles with hearing and speech. He was made a diagnosis of auditory agnosia. The speech therapy was started at two years old. During the first three years, he was taught how to communicate with gestures and lip reading. However, it was difficult for him to understand the meaning of gestures and lip reading. During these years he could acquire lip reading of simple words. As to environmental sounds, he could respond the telephone-bell and the organ at three years and seven months old, but could not discriminate other sounds. At five years old, finger spelling for his language education was introduced. He appeared to have learned finger spelling more easily and could read and write several letters through finger spelling within a month. One year after introduction of finger spelling, he acquired about 60 words (54 nouns and 6 verbs) and could read words and two-words sentences. However, the speed of his acquisition of language was very slow for his age. Now, he can understand mother's simple instructions and communicate with his mother and his speech therapist through finger spelling, but his responses toward environmental sounds are not stable yet. The course of this patient suggests that language acquisition of children with auditory agnosia might be different from that of deaf children. The prognosis of auditory agnosia in children is controversial. In this patient, the development of language is not good as well as in most previous reports, perhaps because of extensive lesions of language area. The patients with auditory agnosia is frequently mistaken for deaf or mentally retarded children. We emphasize that the early diagnosis and early speech therapy with visual communication are needed for these children.
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