Gap detection thresholds of Laura cochlear implant users for complex patterns of stimulation

1999 ◽  
Vol 105 (2) ◽  
pp. 1296-1296
Author(s):  
Astrid van Wieringen ◽  
Jan Wouters
Keyword(s):  
Cochlear Implant ◽  
Gap Detection ◽  
Detection Thresholds ◽  
Complex Patterns

Performance of Some of the Better Cochlear-Implant Patients

1989 ◽  
Vol 32 (4) ◽  
pp. 887-911 ◽  
Author(s):  
Richard S. Tyler ◽  
Brian C. J. Moore ◽  
Francis K. Kuk
Keyword(s):  
Word Recognition ◽  
Cochlear Implant ◽  
Scaling Analysis ◽  
Gap Detection ◽  
Environmental Sound ◽  
Sound Perception ◽  
Detection Thresholds ◽  
Closed Set ◽  
Open Set ◽  
Wide Range

The main purpose of this study was to provide an independent corroboration of open-set word recognition in some of the better cochlear-implant patients. These included the Chorimac, Nucleus (one group from the U.S.A. and one group from Hannover, Germany), Symbion, Duren/Cologne and 3M/Vienna implants. Three experiments are reported: (1) word recognition in word lists and in sentences; (2) environmental sound perception, and (3) gap detection. On word recognition, the scores of 6 Chorimac patients averaged 2.5% words and 0.7% words in sentences correct in the French tests. In the German tests, the scores averaged 17% words and 10% words in sentences for 10 Duren/Cologne patients, 15% words and 16% words in sentences for 9 3M/Vienna patients, and 10% words and 16% words in sentences (3% to 26%) for 10 Nucleus/Hannover patients. In the English tests, the scores averaged 11% words and 29.6% words in sentences for l0 Nucleus-U.S.A. patients, and 13.7% words and 35.7% words in sentences for the 9 Symbion patients. The ability to recognize recorded environmental sounds was measured with a closed set of 18 sounds. Performance averaged 23% correct for Chorimac patients, 41% correct for 3M/Vienna patients, 44% correct for Nucleus/Hannover patients, 21% correct for Duren/Cologne patients, 58% correct for Nucleus/U.S.A. patients, and 83% correct for Symbion patients. A multidimensional scaling analysis suggested that patients were, in part, utilizing information about the envelope and about the periodic/aperiodic nature of some of the sounds. Gap detection thresholds with a one-octave wide noise centered at 500 Hz varied widely among patients. Typically, patients with gap thresholds less than 40 ms showed a wide range of performance on speech perception tasks, whereas patients with gap-detection thresholds greater than 40 ms showed poor word recognition skills.

scholarly journals Effect of stimulus polarity on detection thresholds in cochlear implant users: relationships with average threshold, gap detection, and rate discrimination

2018 ◽  
Author(s):  
Robert P. Carlyon ◽  
Stefano Cosentino ◽  
John M. Deeks ◽  
Wendy Parkinson ◽  
Julie A. Arenberg
Keyword(s):  
Cochlear Implant ◽  
High Amplitude ◽  
Gap Detection ◽  
Detection Thresholds ◽  
Polarity Effect ◽  
Modelling Studies ◽  
Neural Survival ◽  
Rate Discrimination ◽  
Central High ◽  
Anodic Stimulation

AbstractPrevious psychophysical and modelling studies suggest that cathodic stimulation by a cochlear implant (CI) may preferentially activate the peripheral processes of the auditory nerve, whereas anodic stimulation may preferentially activate the central axons. Because neural degeneration typically starts with loss of the peripheral processes, lower thresholds for cathodic than for anodic stimulation may indicate good local neural survival. We measured thresholds for 99-pulse-per-second trains of triphasic (TP) pulses where the central high-amplitude phase was either anodic (TP-A) or cathodic (TP-C). Thresholds were obtained in monopolar mode from four or five electrodes and a total of eight ears from subjects implanted with the Advanced Bionics CI. When between–subject differences were removed, there was a modest but significant correlation between the polarity effect (TP-C threshold minus TP-A threshold) and the average of TP-C and TP-A thresholds, consistent with the hypothesis that a large polarity effect corresponds to good neural survival. When data were averaged across electrodes for each subject, relatively low thresholds for TP-C correlated with a high “upper limit” (the pulse rate up to which pitch continues to increase) from a previous study [Cosentino S, Carlyon RP, Deeks JM, Parkinson W, Bierer JA (2016) Rate discrimination, gap detection and ranking of temporal pitch in cochlear implant users. J Assoc Otolaryngol 17:371– 382]. Overall the results provide modest indirect support for the hypothesis that the polarity effect provides an estimate of local neural survival.

scholarly journals Effect of Stimulus Polarity on Detection Thresholds in Cochlear Implant Users: Relationships with Average Threshold, Gap Detection, and Rate Discrimination

2018 ◽  
Vol 19 (5) ◽  
pp. 559-567 ◽  
Author(s):  
Robert P. Carlyon ◽  
Stefano Cosentino ◽  
John M. Deeks ◽  
Wendy Parkinson ◽  
Julie A. Arenberg
Keyword(s):  
Cochlear Implant ◽  
Gap Detection ◽  
Detection Thresholds ◽  
Rate Discrimination

scholarly journals Impact of Aging and the Electrode-to-Neural Interface on Temporal Processing Ability in Cochlear-Implant Users: Gap Detection Thresholds

2020 ◽  
Vol 24 ◽  
pp. 233121652095656
Author(s):  
Maureen J. Shader ◽  
Sandra Gordon-Salant ◽  
Matthew J. Goupell
Keyword(s):  
Cochlear Implant ◽  
Temporal Processing ◽  
Neural Interface ◽  
Gap Detection ◽  
Middle Aged ◽  
Electrode Gap ◽  
Detection Thresholds ◽  
Auditory Temporal Processing ◽  
Age Related ◽  
Processing Ability

Accurate processing of temporal information is critical to understanding speech through a cochlear implant (CI). This has potential implications for the growing population of CI users who are ≥65 years of age because of age-related auditory temporal processing deficits. The goal of this study was to measure temporal processing ability in a gap detection task in younger, middle-aged, and older CI users and to determine the relative contributions of chronological age and peripheral neural survival to performance. Single-electrode gap detection thresholds (GDTs) were measured using direct stimulation at five electrode locations and three electrical stimulation rates. The relationship between peripheral status (e.g., electrode-to-neural interface) and GDTs was assessed by the slope of the electrically evoked compound action potential (ECAP) amplitude growth function. Results showed that ECAP slope was the strongest subject-level predictor of GDTs. Steeper ECAP slopes, which are partially indicative of better peripheral function, were associated with better GDTs in younger participants. However, ECAP slope significantly interacted with stimulation rate and age, suggesting that ECAP slopes were not predictive of GDTs in middle-aged and older participants at some stimulation rates. ECAP slope was also related to age, with middle-aged and older participants exhibiting relatively shallow slopes and smaller ranges of slopes compared with younger participants. This pattern of ECAP results limited the evaluation of the independent effects of aging per se and peripheral status on temporal processing ability.

scholarly journals Comparison of Signal and Gap-Detection Thresholds for Focused and Broad Cochlear Implant Electrode Configurations

2015 ◽  
Vol 16 (2) ◽  
pp. 273-284 ◽  
Author(s):  
Julie Arenberg Bierer ◽  
John M. Deeks ◽  
Alexander J. Billig ◽  
Robert P. Carlyon
Keyword(s):  
Cochlear Implant ◽  
Gap Detection ◽  
Detection Thresholds

scholarly journals Relationship between gap detection thresholds and loudness in cochlear-implant users

2011 ◽  
Vol 275 (1-2) ◽  
pp. 130-138 ◽  
Author(s):  
Soha N. Garadat ◽  
Bryan E. Pfingst
Keyword(s):  
Cochlear Implant ◽  
Gap Detection ◽  
Detection Thresholds

scholarly journals Audiograms, gap detection thresholds, and frequency difference limens in cannabinoid receptor 1 knockout mice

2016 ◽  
Vol 332 ◽  
pp. 217-222 ◽  
Author(s):  
Katrina L. Toal ◽  
Kelly E. Radziwon ◽  
David P. Holfoth ◽  
Matthew A. Xu-Friedman ◽  
Micheal L. Dent
Keyword(s):  
Knockout Mice ◽  
Cannabinoid Receptor ◽  
Frequency Difference ◽  
Gap Detection ◽  
Cannabinoid Receptor 1 ◽  
Detection Thresholds

Correlations among within-Channel and between-Channel Auditory Gap-Detection Thresholds in Normal Listeners

Perception ◽  
10.1068/p5116 ◽  
2004 ◽  
Vol 33 (3) ◽  
pp. 371-378 ◽  
Author(s):  
Dennis P Phillips ◽  
Jennifer C Smith
Keyword(s):  
Gap Detection ◽  
Detection Thresholds
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