Electrically Evoked Brainstem Responses in Cochlear Implant Recipients

1987 ◽  
Vol 96 (1) ◽  
pp. 34-38 ◽  
Author(s):  
Richard T. Miyamoto ◽  
D. Douglas Brown
Keyword(s):  
Electrical Stimulation ◽  
Cochlear Implant ◽  
Auditory Nerve ◽  
Clinical Applications ◽  
Assessment Tools ◽  
Laboratory Setting ◽  
Recording Technique ◽  
Stimulus Artifact ◽  
Artifact Suppression ◽  
Stimulation Of

Electrical stimulation of the auditory nerve in the profoundly deaf population through implanted cochlear prostheses has increased the need for reliable electrophysiologic assessment tools. We have recorded electrically evoked brainstem responses (EABRs) in 21 subjects who have received a 3M/House cochlear implant. Recordings have been made, both intraoperatively and postoperatively, in the laboratory setting. The recording technique, methods of stimulus artifact suppression, and results of our measurements are described. Clinical applications of this technology are suggested.

Electrical stimulation of the auditory nerve: direct current measurement in vivo

1999 ◽  
Vol 46 (4) ◽  
pp. 461-469 ◽  
Author(s):  
C.Q. Huang ◽  
R.K. Shepherd ◽  
P.M. Center ◽  
P.M. Seligman ◽  
B. Tabor
Keyword(s):  
Electrical Stimulation ◽  
Direct Current ◽  
Auditory Nerve ◽  
Current Measurement ◽  
Direct Current Measurement ◽  
Stimulation Of

scholarly journals INTRACOCHLEAR ELECTRICAL STIMULATION OF THE AUDITORY NERVE IN DEAF KITTENS

1992 ◽  
Vol 95 (9) ◽  
pp. 1372-1378,1479
Author(s):  
JUN-ICHI MATSUSHIMA ◽  
YUKIO INUYAMA
Keyword(s):  
Electrical Stimulation ◽  
Auditory Nerve ◽  
Stimulation Of

Electrical Stimulation of the Ear: Clinical Applications

1983 ◽  
Vol 92 (6) ◽  
pp. 621-622 ◽  
Author(s):  
M. Portmann ◽  
J.-M. Aran ◽  
M. Nègrevergne ◽  
Y. Cazals
Keyword(s):  
Electrical Stimulation ◽  
Round Window ◽  
Clinical Applications ◽  
Positive Currents ◽  
Stimulation Of

Electrical stimulation of the ear in humans was performed with an extracochlear electrode on the round window. With positive currents, suppression of tinnitus could be induced. With negative currents, auditory sensations were evoked. Since electrical stimulation with DC currents may be hazardous in the long term, it cannot yet be proposed for the suppression of tinnitus. However, electrically evoked hearing sensations with AC currents seem to be of definite interest for some totally deaf patients.

Electrical Cochlear Stimulation in the Deaf Cat: Comparisons Between Psychophysical and Central Auditory Neuronal Thresholds

2000 ◽  
Vol 83 (4) ◽  
pp. 2145-2162 ◽  
Author(s):  
Ralph E. Beitel ◽  
Russell L. Snyder ◽  
Christoph E. Schreiner ◽  
Marcia W. Raggio ◽  
Patricia A. Leake
Keyword(s):  
Electrical Stimulation ◽  
Auditory System ◽  
Pulse Rate ◽  
Auditory Nerve ◽  
Round Window ◽  
Electrode Array ◽  
Scala Tympani ◽  
Behavioral Thresholds ◽  
Current Pulses ◽  
Stimulation Of

Cochlear prostheses for electrical stimulation of the auditory nerve (“electrical hearing”) can provide auditory capacity for profoundly deaf adults and children, including in many cases a restored ability to perceive speech without visual cues. A fundamental challenge in auditory neuroscience is to understand the neural and perceptual mechanisms that make rehabilitation of hearing possible in these deaf humans. We have developed a feline behavioral model that allows us to study behavioral and physiological variables in the same deaf animals. Cats deafened by injection of ototoxic antibiotics were implanted with either a monopolar round window electrode or a multichannel scala tympani electrode array. To evaluate the effects of perceptually significant electrical stimulation of the auditory nerve on the central auditory system, an animal was trained to avoid a mild electrocutaneous shock when biphasic current pulses (0.2 ms/phase) were delivered to its implanted cochlea. Psychophysical detection thresholds and electrical auditory brain stem response (EABR) thresholds were estimated in each cat. At the conclusion of behavioral testing, acute physiological experiments were conducted, and threshold responses were recorded for single neurons and multineuronal clusters in the central nucleus of the inferior colliculus (ICC) and the primary auditory cortex (A1). Behavioral and neurophysiological thresholds were evaluated with reference to cochlear histopathology in the same deaf cats. The results of the present study include: 1) in the cats implanted with a scala tympani electrode array, the lowest ICC and A1 neural thresholds were virtually identical to the behavioral thresholds for intracochlear bipolar stimulation; 2) behavioral thresholds were lower than ICC and A1 neural thresholds in each of the cats implanted with a monopolar round window electrode; 3) EABR thresholds were higher than behavioral thresholds in all of the cats (mean difference = 6.5 dB); and 4) the cumulative number of action potentials for a sample of ICC neurons increased monotonically as a function of the amplitude and the number of stimulating biphasic pulses. This physiological result suggests that the output from the ICC may be integrated spatially across neurons and temporally integrated across pulses when the auditory nerve array is stimulated with a train of biphasic current pulses. Because behavioral thresholds were lower and reaction times were faster at a pulse rate of 30 pps compared with a pulse rate of 2 pps, spatial-temporal integration in the central auditory system was presumably reflected in psychophysical performance.

Waveform Discrimination and Phase Sensitivities for Electrical Stimulation of the Auditory Nerve

1987 ◽  
Vol 96 (1_suppl) ◽  
pp. 41-41
Author(s):  
E. S. Hochmair ◽  
I. J. Hochmair-Desoyer ◽  
E-L. von Wallenberg
Keyword(s):  
Electrical Stimulation ◽  
Auditory Nerve ◽  
Stimulation Of

Noninvasive Extratympanic Electrical Stimulation of the Auditory Nerve

ORL ◽  
1988 ◽  
Vol 50 (3) ◽  
pp. 156-161
Author(s):  
Pierre Liard ◽  
Marco Pelizzone ◽  
André Rohr ◽  
Pierre Montandon
Keyword(s):  
Electrical Stimulation ◽  
Auditory Nerve ◽  
Stimulation Of
Sign in / Sign up

Export Citation Format

Share Document