Oral and written language in a case of childhood phonemic deafness

Neuropsychologic and neurolinguistic studies performed on an 11-year-old Landau-Kleffner boy are reported. At age 3 his language began to deteriorate progressively until complete disappearance. At the same time, the patient developed epileptic seizures. When 6 years old, he was taught to match objects to the corresponding written word, and subsequently he was able to learn reading and writing to such extent that he could attend primary school. BAER and primary cortical auditory responses were normal, whereas late cortical components were grossly retarded and distorted. Phonemic discrimination, identification, and production were absent, and in contrast, lexical-semantic abilities tested through reading and writing were normal. In visual STM tasks, phonologic mediation was absent. The role of phonologic mediation in language acquisition is then hypothesized.

[1]  C. Worster-Drought.  An Unusual Form of Acquired Aphasia in Children , 1971, Folia phoniatrica.

[2]  Eleanor M. Saffran,et al.  Immediate memory for word lists and sentences in a patient with deficient auditory short-term memory , 1975, Brain and Language.

[3]  D. J. Murray.  Articulation and acoustic confusability in short-term memory. , 1968 .

[4]  I. Rapin.  Verbal Auditory Agnosia in Children , 1988, Developmental medicine and child neurology.

[5]  A. Baddeley.  The psychology of memory , 1976 .

[6]  Harold Goodglass,et al.  Interaction between phonological and semantic factors in auditory comprehension , 1981, Neuropsychologia.

[7]  E. Renzi,et al.  The token test: A sensitive test to detect receptive disturbances in aphasics. , 1962, Brain : a journal of neurology.

[8]  T Shallice,et al.  Phonological agraphia and the lexical route in writing. , 1981, Brain : a journal of neurology.

[9]  Carlo Tagliavini,et al.  Lessico di frequenza della lingua Italiana contemporanea , 1972 .

[10]  William K. Estes,et al.  Phonemic Coding and Rehearsal in Short-Term Memory for Letter Strings. , 1973 .

[11]  D B Boles,et al.  Visual and phonetic codes and the process of generation in letter matching. , 1983, Journal of experimental psychology. Human perception and performance.

[12]  F. Newcombe,et al.  Late language development in a child unable to recognize or produce speech sounds. , 1983, Archives of neurology.

[13]  E. Kaplan,et al.  The assessment of aphasia and related disorders , 1972 .

[14]  L. Swisher.  The Language Performance of the Oral Deaf , 1976 .

[15]  A. Baddeley,et al.  Word length and the structure of short-term memory , 1975 .

[16]  R. Conrad,et al.  The chronology of the development of covert speech in children. , 1971 .

[17]  W. V. D. Sandt-Koenderman,et al.  A case of acquired aphasia and convulsive disorder: Some linguistic aspects of recovery and breakdown , 1984, Brain and Language.

[18]  W. Landau,et al.  Syndrome of Acquired Aphasia with Convulsive Disorder in Children , 1957, Neurology.

[19]  E. Renzi,et al.  Oral Apraxia and Aphasia , 1966 .

[20]  G. Gascon,et al.  Language Disorder, Convulsive and Electroencephalographic: Acquired Syndrome in Children , 1973 .

[21]  T Shallice,et al.  Neuropsychological Evidence of Visual Storage in Short-term Memory Tasks , 1972, The Quarterly journal of experimental psychology.

[22]  Giuseppe Vallar,et al.  Fractionation of working memory: Neuropsychological evidence for a phonological short-term store , 1984 .

[23]  B. Levy,et al.  Role of articulation in auditory and visual short-term memory , 1971 .

[24]  M I Posner,et al.  Chronometric analysis of classification. , 1967, Psychological review.

[25]  D. Bishop.  Comprehension of spoken, written and signed sentences in childhood language disorders. , 1982, Journal of child psychology and psychiatry, and allied disciplines.

[26]  A. J. Hull,et al.  INFORMATION, ACOUSTIC CONFUSION AND MEMORY SPAN. , 1964, British journal of psychology.

[27]  Alfonso Caramazza,et al.  The selective impairment of phonological processing: A case study , 1983, Brain and Language.

[28]  A. Baddeley,et al.  Phonological short-term store, phonological processing and sentence comprehension: A neuropsychological case study , 1984 .

[29]  Giuseppe Vallar,et al.  Left hemisphere damage and selective impairment of auditory verbal short-term memory. A case study , 1982, Neuropsychologia.