Graeme Clark Collection

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1983 - 1989 2 1990 - 1997 2
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Author: Dowell, Richard × End date: 2012 × Subject: cochlear implant × Subject: electrical stimulation ×

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Now showing 1 - 4 of 4
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    Hearing restoration with the multichannel auditory brainstem implant
    Briggs, R. J. S. ; Kaye, A. H. ; Dowell, R. C. ; Hollow, R. D. ; Clark, Graeme M. ( 1997)
    Restoration of useful hearing is now possible in patients with bilateral acoustic neuromas by direct electrical stimulation of the cochlear nucleus. Our first experience with the Multichannel Auditory Brainstem Implant is reported. A forty four year old female with bilateral acoustic neuromas and a strong family history of Neurofibromatosis Type II presented with profound bilateral hearing impairment. Translabyrinthine removal of the right tumour was performed with placement of the Nucleus eight electrode Auditory Brainstem Implant. Intraoperative electrically evoked auditory brainstem response monitoring successfully confirmed placement over the cochlear nucleus. Postoperatively, auditory responses were obtained on stimulation of all electrodes with minimal non-auditory sensations. The patient now receives useful auditory sensations using the "SPEAK" speech processing strategy. Auditory brainstem Implantation should be considered for patients with Neurofibromatosis Type II in whom hearing preservation tumour removal is not possible.
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    Speech processing for cochlear implants
    Tong, Y. C. ; Millar, J. B. ; Blamey, P. J. ; Clark, Graeme M. ; Dowell, R. C. ; Patrick, J. F. ; Seligman, P. M. (JAI Press Ltd, 1992)
    The cochlear implant is a hearing prosthesis designed to replace the function of the ear. The operation of the prosthesis can be described as a sequence of four functions: the processing of the acoustic signal received by a microphone; the transfer of the processed signal through the skin; the creation of neural activity in the auditory nerve; and the integration of the experience of this neural activity into the perceptual and cognitive processing of the implantee.
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    Two-component hearing sensations produced by two-electrode stimulation in the cochlear of a deaf patient
    Tong, Y. C. ; Dowell, R. C. ; Blamey, P. J. ; Clark, Graeme M. ( 1983)
    http://www.sciencemag.org/cgi/content/abstract/219/4587/993?ijkey=v6jEOhdpzPCxw&keytype=ref&siteid=sci
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    Clinical trial of a multiple-channel cochlear prosthesis: an initial study in four patients with profound total hearing loss
    Bailey, Quentin R. ; Seligman, Peter M. ; Tong, Yit. C. ; Clark, Graeme M. ; Dowell, R. C. ; Brown, Alison M. ; Luscombe, Susan M. ; Pyman, Brian C. ; Webb, Robert L. ( 1983)
    The clinical trial of a multiple-channel cochlear prosthesis was undertaken in four patients with postlingual deafness and profound total hearing loss. The results of open-set speech tests confirmed that, using electrical stimulation alone, one patient could have a meaningful conversation with resorting to lipreading (for example, this patient uses the prosthesis to converse with her husband on the telephone). The results of closed-set speech tests also suggested that a multiple-channel stimulator is more effective than a single-channel one in conveying speech information. The cochlear prosthesis was especially effective in all four patients when it was used in conjunction with lipreading, and speech-tracking tests showed that the patients could combine the information obtained from both electrical stimulation and lipreading.