Postlingual collapse of language and its recovery after cochlear implantation

Ito, Ken; Suzuki, Yoshitake; Toma, Makiko; Shiroma, Masae; Kaga, Kimitaka

doi:10.1016/s0165-5876(01)00627-9

Cited by 3 publications

(3 citation statements)

References 9 publications

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“…The lower panel shows the average progression in performance in children implanted before (dashed line) and after (continuous line) age 5.6 years. Some authors have declared, based on their data, that there is a critical period in development during which oral communication must be audible for normal speech and language development (Brackett & Zara, 1998;Ito, Suzuki, Toma, Shiroma, & Kaga, 2002;Robinson, 1998) and that central auditory plasticity is limited for children implanted at older ages (Manrique et al, 1999). We find a clear distinction between postimplant performance in children having a duration of deprivation of up to 6 years compared with those deaf until implanted at age 8 years and older.…”

Section: The Present Studymentioning

confidence: 56%

Is there a critical period for cochlear implantation in congenitally deaf children? Analyses of hearing and speech perception performance after implantation

Harrison

Gordon

Mount

2005

Developmental Psychobiology

175

108

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A range of basic and applied studies have demonstrated that during the development of the auditory system, early experimental manipulations or clinical interventions are generally more effective than those made later. We present a short review of these studies. We investigated this age-related plasticity in relation to the timing of cochlear implantation in deaf-from-birth children. Cochlear implantation is a standard intervention for providing hearing in children with severe to profound deafness. An important practical question is whether there is a critical period or cutoff age of implantation after which hearing outcomes are significantly reduced. In this article, we present data from prelingually deaf children (mostly congenitally deaf) implanted at ages ranging from 1 to 15 years. Each child was tested with auditory and speech understanding tests before implantation, and at regular intervals up to 8 years postimplantation. We measured the improvement in performance of speech understanding tests in younger implanted children and compared it with the results of those implanted at a later age. We also used a binary partitioning algorithm to divide the data systematically at all ages at implant to determine the optimum split, i.e., to determine the age at implant which best separates performance of early implanted versus later implanted children. We observed distinct age-of-implant cutoffs, and will discuss whether these really represent critical periods during development.

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Section: The Present Studymentioning

confidence: 56%

Is there a critical period for cochlear implantation in congenitally deaf children? Analyses of hearing and speech perception performance after implantation

Harrison

Gordon

Mount

2005

Developmental Psychobiology

175

108

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show abstract

“…Together with appropriate and consistent auditory-oral therapy they provide severely to profoundly hearing impaired persons with the choice of functioning and interacting in the hearing world more easily. Studies have shown that, provided that the criteria and guidelines for patient selection are observed, they are beneficial for the improvement of voice quality, intelligibility, speech perception and production in prelingually impaired (Tobey, Geers, & Brenner, 1996;Kishon-Rabin et al, 2002;Mildner, Š indija, & Horga, 2003;Calmels et al, 2004) as well as in postlingually deafened children and adults (Matthies & Svirsky, 1996;Ito, Suzuki, Toma, Shiroma, & Kaga, 2002;Välimaa, Määttä, Lö ppö nen, & Sorri, 2002a, b). The effectiveness of cochlear implants is most frequently tested by means of listening and comprehension tests and/or by analysis of the speech of their users (O'Donoghue, Nikolopoulos, Archbold, & Tait, 1999;Richter, Eissele, Laszig, & Lohle, 2002;Houston, Pisoni, Iler Kirk, Ying, & Miyamoto, 2003;Calmels et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

Acoustic analysis of the speech of children with cochlear implants: A longitudinal study

Liker

Mildner

Šindija³

2007

Clinical Linguistics & Phonetics

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The aim of the study was to analyse the speech of the children with cochlear implants, and compare it with the speech of hearing controls. We focused on three categories of Croatian sounds: vowels (F1 and F2 frequencies), fricatives (noise frequencies of /s/ and /S/ ), and affricates (total duration and the pattern of stop-fricative components in /ts/ and /tS/ ). Eighteen implanted children, aged between 9;5 and 15;2 years participated in the study. All had been profoundly hearing impaired before implantation. Three recordings per child were made over a 20-month period. The hearing controls were matched for age and sex. Implanted children had a smaller and fronted vowel space, their /s/ and /S/ noise frequencies overlapped, affricates were longer, with a high proportion of incorrect productions and substitutions. With time, there was a small but steady overall improvement in all categories. Early intervention (rehabilitation and implantation) are crucial for good speech acquisition.

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“…We already had had another successful pediatric case in which not only verbal improvement but also marked behavioral improvement was attained after cochlear implantation. 9 These observations may indicate that auditory stimuli have a positive effect on overall central nervous system activities, which can justify the extended indication of cochlear implantation for patients with central disorders. …”

Section: Commentmentioning

confidence: 99%

Successful Cochlear Implantation in a Patient With Bilateral Thalamic Infarction

Ito

Ishida²,

Akamatsu³

et al. 2007

Arch Otolaryngol Head Neck Surg

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Postlingual collapse of language and its recovery after cochlear implantation

Cited by 3 publications

References 9 publications

Is there a critical period for cochlear implantation in congenitally deaf children? Analyses of hearing and speech perception performance after implantation

Is there a critical period for cochlear implantation in congenitally deaf children? Analyses of hearing and speech perception performance after implantation

Acoustic analysis of the speech of children with cochlear implants: A longitudinal study

Successful Cochlear Implantation in a Patient With Bilateral Thalamic Infarction

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