Graeme Clark Collection

Permanent URI for this collection

http://hdl.handle.net/11343/375

Filters

1991 - 1995 2
Reset filters

Settings
Statistics
Citations
Author: Dowell, Richard × Author: Shepherd, Robert × Start date: 1990 × Type: Conference Item × Subject: otology ×

Search Results

Now showing 1 - 2 of 2
  • Item
    Thumbnail Image
    The auditory cortex and auditory deprivation: experience with cochlear implants in the congenitally deaf [Abstract]
    Shepherd, R. K. ; Hartmann, R. ; Heid, S. ; Klinke, R. ; Blamey, P. J. ; Dowell, R. C. ; Clarke, Graeme M. ( 1995)
    The primary auditory cortex (AI) exhibits a topographic representation of the organ of Corti in normal hearing animals. Plasticity studies have shown that this orderly representation of frequency can be modified following a restricted hearing loss or by behavioural trainingl,2. Little is known, however, of the effects of a profound hearing loss on AI, although a number of early studies have suggested an enhancement of activity from other modalities3. Knowledge of the functional status of the central auditory pathway in the profoundly deaf, and the ability of these structures to undergo reorganization particularly following long periods of auditory deprivation - are important issues for the clinical management of cochlear implant patients. In this paper we review our recent clinical and experimental experience with cochlear implants in the congenitally deaf.
  • Item
    Thumbnail Image
    Clinical results for children using the 22-channel cochlear prosthesis [Abstract]
    Dowell, Richard C. ; Clark, Graeme M. ; Shepherd, Robert K. ( 1991)
    Twenty five profoundly/totally hearing-impaired children aged between 2 and 18 years have been implanted with the 22-channel cochlear prosthesis (Cochlear Pty. Ltd.) at The University of Melbourne over the last five years. Speech perception, speech production and language development have been monitored for these children both pre- and postoperatively. Results have shown improvements for all children in speech perception, postoperatively. The younger children (< 12 years) and those with an acquired (postlinguistic) profound hearing loss, have demonstrated some open-set speech recognition without visual clues. In general, older children with a prelinguistic profound hearing loss have not attained this level of performance. Improvements in speech production and language have also been demonstrated and tend to occur faster in younger children. Importantly, a number of congenitally deaf young children have shown significant improvements in speech perception, production and language. Important factors in the success of cochlear implants in children appear to be: educational environment - it is vital to have a strong auditory component (i.e. non-signing); careful attention to correct programming and maintenance of the prosthesis; support of family and other professionals.