Age-Related Temporal Processing Deficits in Word Segments in Adult Cochlear-Implant Users

Xie, Zilong; Gaskins, Casey R.; Shader, Maureen J.; Gordon‐Salant, Sandra; Anderson, Samira; Goupell, Matthew J.

doi:10.1177/2331216519886688

Cited by 17 publications

(21 citation statements)

References 74 publications

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“…The current finding of age-related declines in temporal pulse rate discrimination at higher stimulation rates compared with lower stimulation rates (Figure 2) agrees with emerging evidence of age-related changes in temporal processing in CI users in a variety of tasks such as word identification based on silence duration cues (Xie et al, 2019), amplitude modulation detection (Shader et al, 2020a), gap detection (Shader et al, 2020b), and voice emotion recognition (Christensen et al, 2019). The aging effects on temporal processing (e.g., temporal pulse rate discrimination) are likely to be associated with age-related changes at peripheral (Sergeyenko et al, 2013) and central processing (Anderson et al, 2020;Clinard et al, 2010;Gaskins et al, 2019).…”

Section: Effect Of Age On Pulse Rate Discrimination Performancesupporting

confidence: 85%

“…Natural aging processes negatively affect peripheral neural health (e.g., the loss of spiral ganglion cells and auditory nerve fibers; Sergeyenko et al., 2013 ) and central auditory processing abilities ( Clinard et al., 2010 ; Gaskins et al., 2019 ), which may contribute to declines in temporal processing in CI users ( Committee on Hearing, Bioacoustics, and Biomechanics, 1988 ; Gordon-Salant et al., 2011 ; Jin et al., 2014 ). Indeed, age-related deficits in auditory temporal processing have been documented in older CI listeners on measures of word identification based on silence duration cues ( Xie et al., 2019 ), amplitude modulation detection ( Shader et al., 2020a ), gap detection ( Shader et al., 2020b ), and voice emotion recognition ( Chatterjee et al., 2015 ; Christensen et al., 2019 ). However, it remains unclear whether aging impacts the ability to discriminate pulse rate changes in CI users.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Chronological Age on Pulse Rate Discrimination in Adult Cochlear-Implant Users

et al. 2021

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Cochlear-implant (CI) users rely heavily on temporal envelope cues to understand speech. Temporal processing abilities may decline with advancing age in adult CI users. This study investigated the effect of age on the ability to discriminate changes in pulse rate. Twenty CI users aged 23 to 80 years participated in a rate discrimination task. They attempted to discriminate a 35% rate increase from baseline rates of 100, 200, 300, 400, or 500 pulses per second. The stimuli were electrical pulse trains delivered to a single electrode via direct stimulation to an apical (Electrode 20), a middle (Electrode 12), or a basal location (Electrode 4). Electrically evoked compound action potential amplitude growth functions were recorded at each of those electrodes as an estimate of peripheral neural survival. Results showed that temporal pulse rate discrimination performance declined with advancing age at higher stimulation rates (e.g., 500 pulses per second) when compared with lower rates. The age-related changes in temporal pulse rate discrimination at higher stimulation rates persisted after statistical analysis to account for the estimated peripheral contributions from electrically evoked compound action potential amplitude growth functions. These results indicate the potential contributions of central factors to the limitations in temporal pulse rate discrimination ability associated with aging in CI users.

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Section: Effect Of Age On Pulse Rate Discrimination Performancesupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

Effect of Chronological Age on Pulse Rate Discrimination in Adult Cochlear-Implant Users

et al. 2021

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“…Many studies have found that advancing age negatively impacts CI performance using a variety of word and sentence recognition measures ( Blamey et al., 2013 ; Chatelin et al., 2004 ; Friedland et al., 2010 ; Sladen & Zappler, 2015 ; Xie et al., 2019 ). Sladen and Zappler (2015) measured speech recognition scores on multiple word and sentence tests in quiet and in noise for an older group (mean = 70.7 years) and a younger group (mean = 39.7 years).…”

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

2020

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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.

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“…The Montreal Cognitive Assessment (MoCA) was used to screen for cognitive decline ( Nasreddine et al., 2005 ). All listeners had scores ≥ 22 ( Anderson et al., 2012 ; Goupell et al., 2017 ; Xie et al., 2019 ).…”

Section: Methodsmentioning

confidence: 99%

Head Shadow, Summation, and Squelch in Bilateral Cochlear-Implant Users With Linked Automatic Gain Controls

Bakal

Milvae

Chen³

et al. 2021

Trends in Hearing

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Speech understanding in noise is poorer in bilateral cochlear-implant (BICI) users compared to normal-hearing counterparts. Independent automatic gain controls (AGCs) may contribute to this because adjusting processor gain independently can reduce interaural level differences that BICI listeners rely on for bilateral benefits. Bilaterally linked AGCs may improve bilateral benefits by increasing the magnitude of interaural level differences. The effects of linked AGCs on bilateral benefits (summation, head shadow, and squelch) were measured in nine BICI users. Speech understanding for a target talker at 0° masked by a single talker at 0°, 90°, or −90° azimuth was assessed under headphones with sentences at five target-to-masker ratios. Research processors were used to manipulate AGC type (independent or linked) and test ear (left, right, or both). Sentence recall was measured in quiet to quantify individual interaural asymmetry in functional performance. The results showed that AGC type did not significantly change performance or bilateral benefits. Interaural functional asymmetries, however, interacted with ear such that greater summation and squelch benefit occurred when there was larger functional asymmetry, and interacted with interferer location such that smaller head shadow benefit occurred when there was larger functional asymmetry. The larger benefits for those with larger asymmetry were driven by improvements from adding a better-performing ear, rather than a true binaural-hearing benefit. In summary, linked AGCs did not significantly change bilateral benefits in cases of speech-on-speech masking with a single-talker masker, but there was also no strong detriment across a range of target-to-masker ratios, within a small and diverse BICI listener population.

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Age-Related Temporal Processing Deficits in Word Segments in Adult Cochlear-Implant Users

Cited by 17 publications

References 74 publications

Effect of Chronological Age on Pulse Rate Discrimination in Adult Cochlear-Implant Users

Effect of Chronological Age on Pulse Rate Discrimination in Adult Cochlear-Implant Users

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

Head Shadow, Summation, and Squelch in Bilateral Cochlear-Implant Users With Linked Automatic Gain Controls

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