An electric frequency-to-place map for a cochlear implant patient with hearing in the nonimplanted ear.

An electric frequency-to-place map for a cochlear implant patient with hearing in the nonimplanted ear. Research Abstract Details 

Research Abstract Table of Contents

Jump to the:

An electric frequency-to-place map for a cochlear implant patient with hearing in the nonimplanted ear. Abstract Text:

Michael F Dorman,Tony Spahr,Rene Gifford,Louise Loiselle,Sharon McKarns,Timothy Holden,Margaret Skinner,Charles Finley,

The aim of this study was to relate the pitch of high-rate electrical stimulation delivered to individual cochlear implant electrodes to electrode insertion depth and insertion angle. The patient (CH1) was able to provide pitch matches between electric and acoustic stimulation because he had auditory thresholds in his nonimplanted ear ranging between 30 and 60 dB HL over the range, 250 Hz to 8 kHz. Electrode depth and insertion angle were measured from high-resolution computed tomography (CT) scans of the patient's temporal bones. The scans were used to create a 3D image volume reconstruction of the cochlea, which allowed visualization of electrode position within the scala. The method of limits was used to establish pitch matches between acoustic pure tones and electric stimulation (a 1,652-pps, unmodulated, pulse train). The pitch matching data demonstrated that, for insertion angles of greater than 450 degrees or greater than approximately 20 mm insertion depth, pitch saturated at approximately 420 Hz. From 20 to 15 mm insertion depth pitch estimates were about one-half octave lower than the Greenwood function. From 13 to 3 mm insertion depth the pitch estimates were approximately one octave lower than the Greenwood function. The pitch match for an electrode only 3.4 mm into the cochlea was 3,447 Hz. These data are consistent with other reports, e.g., Boëx et al. (2006), of a frequency-to-place map for the electrically stimulated cochlea in which perceived pitches for stimulation on individual electrodes are significantly lower than those predicted by the Greenwood function for stimulation at the level of the hair cell.

An electric frequency-to-place map for a cochlear implant patient with hearing in the nonimplanted ear. Publishing Authors By Initials

MF Dorman,T Spahr,R Gifford,L Loiselle,S McKarns,T Holden,M Skinner,C Finley,

For similar psychological phenomena and processes: mental processes: perception: auditory perception: pitch perception: pitch discrimination research abstracts see: psychological phenomena and processes: mental processes: perception: auditory perception: pitch perception: pitch discrimination research

PUBMED ID PMID:

MEDLINE DATE:

An electric frequency-to-place map for a cochlear implant patient with hearing in the nonimplanted ear. Journal Published:

PUBLICATION TYPE: Research Support, N.I.H., Extr

Journal: Journal of the Association for Research in Otolary

VOLUME: 8

Page Numbers: 234-40

Journal Abbreviation:

ISSN: 1525-3961

DAY: 10

MONTH: 03

YEAR: 2007

An electric frequency-to-place map for a cochlear implant patient with hearing in the nonimplanted ear. Information

Number of References:

LANGUAGE: eng

NlmUniqueID: 100892857

An electric frequency-to-place map for a cochlear implant patient with hearing in the nonimplanted ear. Keywords Mesh Terms:

KEYWORDS: Pitch Discrimination

MESH TERMS: physiology

Chemical & Substance for Abstract: An electric frequency-to-place map for a cochlear implant patient with hearing in the nonimplanted ear. Information

Substance Name:

Registry Number:

Grant and Affiliation Information for An electric frequency-to-place map for a cochlear implant patient with hearing in the nonimplanted ear.

AFFILIATION: Department of Speech and Hearing Science, Arizona State University, Tempe, AZ 85287-0102, USA. mdorman@asu.edu

Country: United States

AGENCY: United States NIDCD

GRANT: R21 DC006665

ACRONYM: DC

MEDLINETA: J Assoc Res Otolaryngol

REFSOURCE:

DATABASENAME:

ACCESSION NUMBER:

Number Hits: 0

An electric frequency-to-place map for a cochlear implant patient with hearing in the nonimplanted ear Related Publications

• "Doctor, I think my baby is in pain": the assessment of infants' pain by health professionals.
• A pediatric case of ketamine-associated cystitis (Letter-to-the-Editor RE: Shahani R, Streutker C, Dickson B, et al: Ketamine-associated ulcerative cystitis: a new clinical entity. Urology 69: 810-812, 2007).
• A proteome-wide protein interaction map for Campylobacter jejuni.
• A report of seventeen cases subjected to intracardiac exploration for mitral commissurotomy.
• A study of airborne chrysotile concentrations associated with handling, unpacking, and repacking boxes of automobile clutch discs.
• A ubiquitin stress response induces altered proteasome composition.
• An electric frequency-to-place map for a cochlear implant patient with hearing in the nonimplanted ear.
• An evaluation of reported no-effect chrysotile asbestos exposures for lung cancer and mesothelioma.
• Anterior fundoplication decreases esophageal clearance in patients undergoing Heller myotomy for achalasia.
• Automated segmentation and classification of high throughput yeast assay spots.
• Carotid sinus hypersensitivity as a sign of intracranial disease; case of cerebellar angioblastoma.
• Deubiquitinating enzyme Ubp6 functions noncatalytically to delay proteasomal degradation.
• Equine and St. Louis encephalomyelitis in the Central Valley of California.
• How to standardize the multiplicity of methods to evaluate natural antioxidants.
• In vivo estimates of the position of advanced bionics electrode arrays in the human cochlea.
• Is solo simpler?
• Kerato-acanthoma.
• Minocycline-induced hyperpigmentation. Treatment with the neodymium:YAG laser.
• Promoting basal levels of autophagy in the nervous system enhances longevity and oxidant resistance in adult Drosophila.
• Promoting basal levels of autophagy in the nervous system enhances longevity and oxidant resistance in adult Drosophila.
• Risk of gastrointestinal disease associated with exposure to pathogens in the water of the Lower Passaic River.
• Stability of the proteasome can be regulated allosterically through engagement of its proteolytic active sites.
• The effects of ultra-violet radiations on Spirostomum ambiguum.
• The role of peer communication in the socialization of adolescents' pain experiences: a qualitative investigation.
• The user in the next cubicle.
• Trends in the prevalence of congenital heart disease: comprehensive observations over a 24-year period in a defined region of Canada.
• Ubiquitin chains are remodeled at the proteasome by opposing ubiquitin ligase and deubiquitinating activities.
• Urticaria pigmentosa discordant in identical twins.
• Virus encephalomyelitides.
• Wound closure after split-thickness skin grafting is accelerated with the use of continuous direct anodal microcurrent applied to silver nylon wound contact dressings.