Impact of Cochlear Implantation on Cognitive Functions of Older Adults: Pilot Test Results

Jayakody, Dona M. P.; Friedland, Peter; Nel, Esmeralda; Martins, Ralph N.; Atlas, Marcus D.; Sohrabi, Hamid R.

doi:10.1097/mao.0000000000001502

Cited by 80 publications

(91 citation statements)

References 34 publications

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“…A more recent review examined the results of six studies, relying on a total of 166 patients [72]. Five of these studies reported improvements in cognition after implantation [65][66][67][68][69] and one study did not observe significant changes [70]. Although the results are globally promising, the authors underlined the numerous biases of such studies, including small sample sizes, lack of control group in some studies, lack of control of practice effects, inappropriate statistical methods and lack of long-term follow-up measures.…”

Section: Cochlear Implants and Cognitive Outcomes In Older Adultsmentioning

confidence: 99%

Does Treating Hearing Loss in Older Adults Improve Cognitive Outcomes? A Review

Amieva

Ouvrard

2020

JCM

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Hearing loss is the third most prevalent health condition in older age. In recent years, research has consistently reported an association between hearing loss and mental health outcomes, including poorer cognitive performances. Whether treating hearing loss in elders improves cognition has been directly or indirectly addressed by several studies. This review aims at providing a synthesis of those results. Regarding the literature on hearing aids' use and cognition, although the lack of interventional studies has to be underlined, observational data suggest that hearing aids positively impact long-term cognition, even though more research is necessary to ascertain this statement and provide information on the length or frequency of use required in order to observe benefits. Regarding cochlear implants in elders experiencing more severe auditory deprivation, the literature is scarcer. The available studies have many limitations and do not allow the drawing of clear conclusions. Taken together, the results are encouraging. Nevertheless, because hearing loss is suspected to account for 9% of dementia cases, and also because hearing loss is one of the few potentially modifiable factors from a dementia prevention perspective, the need to stimulate research to have clearer knowledge of the benefits of treating hearing loss on cognitive outcomes is urgent.

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Section: Cochlear Implants and Cognitive Outcomes In Older Adultsmentioning

confidence: 99%

Does Treating Hearing Loss in Older Adults Improve Cognitive Outcomes? A Review

Amieva

Ouvrard

2020

JCM

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“…Furthermore, studies demonstrate that if the prevalence of each risk factor is reduced by only 10–20% per decade, the number of AD diagnoses could reduce by between 8.8 and 16.2 million worldwide by 2050 (Norton et al, 2014 ). As an example of potential changes in outcome measures following hearing loss correction, we have recently reported that cochlear implant recipients performed significantly better on cognitive function measures compared to similar individuals on a waiting list to receive cochlear implants (Jayakody et al, 2017 ). Others have also reported similar positive results following hearing loss improvement using hearing aids and cochlear implantation (Castiglione et al, 2016 ; Sonnet et al, 2017 ).…”

Section: Consequences Of Arhlmentioning

confidence: 99%

Impact of Aging on the Auditory System and Related Cognitive Functions: A Narrative Review

et al. 2018

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Age-related hearing loss (ARHL), presbycusis, is a chronic health condition that affects approximately one-third of the world's population. The peripheral and central hearing alterations associated with age-related hearing loss have a profound impact on perception of verbal and non-verbal auditory stimuli. The high prevalence of hearing loss in the older adults corresponds to the increased frequency of dementia in this population. Therefore, researchers have focused their attention on age-related central effects that occur independent of the peripheral hearing loss as well as central effects of peripheral hearing loss and its association with cognitive decline and dementia. Here we review the current evidence for the age-related changes of the peripheral and central auditory system and the relationship between hearing loss and pathological cognitive decline and dementia. Furthermore, there is a paucity of evidence on the relationship between ARHL and established biomarkers of Alzheimer's disease, as the most common cause of dementia. Such studies are critical to be able to consider any causal relationship between dementia and ARHL. While this narrative review will examine the pathophysiological alterations in both the peripheral and central auditory system and its clinical implications, the question remains unanswered whether hearing loss causes cognitive impairment or vice versa.

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“…Recently there is an increasing interest in neurocognitive changes in older subjects after hearing rehabilitation. 35 – 39 Mosnier was the first who investigated cognitive functions in older hearing-impaired subjects between 65 and 85 years before and after cochlear implantation and reported on benefits mainly regarding recall and attention. 40 An improvement in attention has also been found by Sarant in 59 CI patients aged 72 that underwent testing with the Cogstate battery 18 months after cochlear implantation.…”

Section: Introductionmentioning

confidence: 99%

“… 36 Similar findings have also been described by Jayakody in 16 CI recipients with a mean age of 61.7 that underwent testing with the Cambridge Neuropsychological Test Automated Battery (CANTAB). 35 …”

Section: Introductionmentioning

confidence: 99%

<p>Benefits of Cochlear Implantation in Middle-Aged and Older Adults</p>

Völter¹,

Götze²,

Haubitz³

et al. 2020

CIA

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Introduction Nowadays cochlear implantation (CI) is the treatment of choice in adults in case conventional hearing devices fail. Besides speech perception, an improvement in quality of life and in cognitive performance has been reported. Thereby, the study focused on the impact of age. Participants and Methods Thirty middle-aged (MA) between 50 and 64 years and 41 older subjects (OA) aged 65 and older with bilateral severe hearing loss performed a comprehensive computer-based neurocognitive test battery (ALAcog) pre- and 12 months post-implantation. Besides, monosyllabic speech perception in quiet (Freiburg monosyllabic speech test), health-related quality of life (HR-QoL, Nijmegen Cochlear Implant Questionnaire) and depressive symptoms (GDS-15) have been assessed. Results Both age groups significantly improved in all three categories after 12 months. No differences were evaluated between MA and OA regarding speech perception and HR-QoL pre- and post-operatively. In contrast, cognitive performance differed between the age groups: pre-operatively OA performed worse in most neurocognitive subdomains like working memory (p=0.04), inhibition (p=0.004), processing speed (p=0.003) and mental flexibility (p=0.01), post-operatively MA outperformed OA only in inhibition (p=0.01). Age only slightly influenced cognitive performance in MA, whereas in OA age per se tremendously impacted on working memory (p=0.04), inhibition (p=0.02), memory (p=0.04) and mental flexibility (p=0.01). Educational level also affected processing speed, mental flexibility (p=0.01) and working memory (p=0.01). This was more pronounced in OA. In both age groups, hearing status had a strong effect on attentional tasks (p=0.01). In MA, depressive symptoms were more influential on cognitive functioning and on HR-QoL than in OA. Improvement in quality of life (p=0.0002) and working memory (p=0.001) was greater for those with a higher pre-operative depression score. Conclusion Speech perception and HR-QoL improved in hearing impaired, independently of age. Pre-operative differences in cognitive performance between OA and MA clearly attenuated 12 months after CI. Impact of comorbidities differed between age groups.

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Impact of Cochlear Implantation on Cognitive Functions of Older Adults: Pilot Test Results

Cited by 80 publications

References 34 publications

Does Treating Hearing Loss in Older Adults Improve Cognitive Outcomes? A Review

Does Treating Hearing Loss in Older Adults Improve Cognitive Outcomes? A Review

Impact of Aging on the Auditory System and Related Cognitive Functions: A Narrative Review

<p>Benefits of Cochlear Implantation in Middle-Aged and Older Adults</p>

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