History of Cochlear Implants and Auditory Brainstem Implants

School of Behavioral and Brain Sciences, University of Texas at Dallas, Dallas, Tex., USA Cochlear implants have evolved during the past 30 years from the single-electrode device introduced by Dr. William House, to the multi-electrode devices with complex digital signal processing that are in use now. This paper describes the history of the development of cochlear implants and auditory brainstem implants (ABIs). The designs of modern cochlear and auditory brainstem implants are described, and...

Histopathology of the Inner Ear Relevant to Cochlear Implantation

Eddingtona,c,d aDepartment of Otology and Laryngology, Harvard Medical School, bDepartment of Otolaryngology, cCochlear Implant Research Laboratory, Massachusetts Eye and Ear Infirmary, dResearch Laboratory of Electronics, Massachusetts Institute of Technology, Boston, Mass., USA The most common forms of severe hearing loss and deafness are related to morphological changes in the cochlea. Many individuals with such forms of hearing disorders have received...

Agc

Block diagram of the F0 F1 F2 processor. Two electrodes are used for pulsatile stimulation, one corresponding to the F1 frequency and the other corresponding to the frequency of F2. The rate of the impulses is that of F0 for voiced sounds, and a quasi-random rate average of 100 pps for unvoiced segments. From Loizou 5 . with small time intervals continuous interleaved sampling, CIS 5, 8 see also Loizou, this vol, pp 109-143 . The output of the bandpass filters controlled the amplitude...

Dfna9

Fracture Spiral Lamina

DFNA-9 is an autosomal dominantly inherited disorder, which produces adult onset sensorineural loss. The molecular genetic basis of this disorder has been demonstrated 35 as a missense mutation in the cochlear gene COCH. This disorder is of interest not only because its molecular genetics are understood, but Fig. 8. This 82-year-old woman suffered profound congenital deafness as a consequence of Usher's syndrome type I. The histopathologic correlate of this deafness included atrophy of the...