Responses of dorsal cochlear nucleus single units to electrical pulse train stimulation of the auditory nerve with a cochlear implant electrode

1995 ◽  
Vol 97 (4) ◽  
pp. 2378-2393 ◽  
Author(s):  
Stephen J. O’Leary ◽  
Yit C. Tong ◽  
Graeme M. Clark
Keyword(s):  
Cochlear Implant ◽  
Cochlear Nucleus ◽  
Auditory Nerve ◽  
Pulse Train ◽  
Dorsal Cochlear Nucleus ◽  
Electrical Pulse ◽  
Single Units ◽  
Train Stimulation ◽  
Stimulation Of

Dorsal cochlear nucleus responses to electrical stimulation of the auditory nerve

1990 ◽  
Vol 88 (S1) ◽  
pp. S193-S193 ◽  
Author(s):  
Stephen J. O'Leary ◽  
Yit C. Tong ◽  
Graeme M. Clark
Keyword(s):  
Electrical Stimulation ◽  
Cochlear Nucleus ◽  
Auditory Nerve ◽  
Dorsal Cochlear Nucleus ◽  
Stimulation Of

Responses of single units in cerebellar vermis of the cat to monaural and binaural stimuli

1975 ◽  
Vol 38 (2) ◽  
pp. 418-429 ◽  
Author(s):  
L. M. Aitkin ◽  
J. Boyd
Keyword(s):  
Inferior Colliculus ◽  
Cochlear Nucleus ◽  
Single Units ◽  
Intensity Difference ◽  
Cerebellar Neurons ◽  
Monaural Stimulation ◽  
Sustained Responses ◽  
Maximal Discharge ◽  
Onset Responses ◽  
Stimulation Of

The responses of 146 cerebellar neurons to tone stimuli were studied in 29 cats anesthetized with chloralose-urethan and in 7 decerebrate preparations. Units were classified as onset or sustained firing. Onset spikes occurred on stimulation of either ear and showed binaural facilitation, while sustained discharges were frequently only excited by monaural stimulation. The latent periods of sustained discharges appeared to be shorter than those of onset responses, and sustained discharges were also more sharply tuned than the onset units. Evidence was presented suggesting that onset responses reflected input from the inferior colliculus and sustained responses, the cochlear nucleus. The sterotyped facilitatory behavior of onset units suggested that a maximal discharge might occur if sounds were of equal intensity at each ear; 26 neurons were examined with variable interaural time or intensity differences and 10 of these exhibited maximal firing when the interaural time and intensity difference was zero--i.e., if the sound was located directly in front of the head.

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.

Vertical Cell Responses to Sound in Cat Dorsal Cochlear Nucleus

1999 ◽  
Vol 82 (2) ◽  
pp. 1019-1032 ◽  
Author(s):  
William S. Rhode
Keyword(s):  
Cochlear Nucleus ◽  
Auditory Nerve ◽  
Molecular Layer ◽  
Broadband Noise ◽  
Dorsal Cochlear Nucleus ◽  
Type Ii ◽  
Fusiform Cell ◽  
Sound Sources ◽  
Tuning Curves ◽  
Axonal Arbors

The dorsal cochlear nucleus receives input from the auditory nerve and relays acoustic information to the inferior colliculus. Its principal cells receive two systems of inputs. One system through the molecular layer carries multimodal information that is processed through a neuronal circuit that resembles the cerebellum. A second system through the deep layer carries primary auditory nerve input, some of which is relayed through interneurons. The present study reveals the morphology of individual interneurons and their local axonal arbors and how these inhibitory interneurons respond to sound. Vertical cells lie beneath the fusiform cell layer. Their dendritic and axonal arbors are limited to an isofrequency lamina. They give rise to pericellular nests around the base of fusiform cells and their proximal basal dendrites. These cells exhibit an onset-graded response to short tones and have response features defined as type II. They have tuning curves that are closed contours (0 shaped), thresholds ∼27 dB SPL, spontaneous firing rates of ∼0 spikes/s, and they respond weakly or not at all to broadband noise, as described for type II units. Their responses are nonmonotonic functions of intensity with peak responses between 30 and 60 dB SPL. They also show a preference for the high-to-low direction of a frequency sweep. It has been suggested that these circuits may be involved in the processing of spectral cues for the localization of sound sources.

Electrical Pulse Train and Single Pulse Stimulation of the Small Intestine: Acute and Chronic Studies in the Dog

1989 ◽  
Vol 13 (2) ◽  
pp. 116-122 ◽  
Author(s):  
Anton Moritz ◽  
Sharon Grundfest-Broniatowski ◽  
Laszlo Ilyes ◽  
Jerry Kasick ◽  
Gordon Jacobs ◽  
...  
Keyword(s):  
Small Intestine ◽  
Pulse Train ◽  
Single Pulse ◽  
Electrical Pulse ◽  
Pulse Stimulation ◽  
Stimulation Of
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