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Tarawneh HY, Menegola HK, Peou A, Tarawneh H, Jayakody DMP. Central Auditory Functions of Alzheimer's Disease and Its Preclinical Stages: A Systematic Review and Meta-Analysis. Cells 2022; 11:1007. [PMID: 35326458 PMCID: PMC8947537 DOI: 10.3390/cells11061007] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 03/01/2022] [Accepted: 03/12/2022] [Indexed: 01/01/2023] Open
Abstract
In 2020, 55 million people worldwide were living with dementia, and this number is projected to reach 139 million in 2050. However, approximately 75% of people living with dementia have not received a formal diagnosis. Hence, they do not have access to treatment and care. Without effective treatment in the foreseeable future, it is essential to focus on modifiable risk factors and early intervention. Central auditory processing is impaired in people diagnosed with Alzheimer's disease (AD) and its preclinical stages and may manifest many years before clinical diagnosis. This study systematically reviewed central auditory processing function in AD and its preclinical stages using behavioural central auditory processing tests. Eleven studies met the full inclusion criteria, and seven were included in the meta-analyses. The results revealed that those with mild cognitive impairment perform significantly worse than healthy controls within channel adaptive tests of temporal response (ATTR), time-compressed speech test (TCS), Dichotic Digits Test (DDT), Dichotic Sentence Identification (DSI), Speech in Noise (SPIN), and Synthetic Sentence Identification-Ipsilateral Competing Message (SSI-ICM) central auditory processing tests. In addition, this analysis indicates that participants with AD performed significantly worse than healthy controls in DDT, DSI, and SSI-ICM tasks. Clinical implications are discussed in detail.
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Affiliation(s)
- Hadeel Y. Tarawneh
- Ear Science Institute Australia, Subiaco, WA 6008, Australia; (H.Y.T.); (H.K.M.); (A.P.); (H.T.)
- Ear Sciences Centre, School of Surgery, University of Western Australia, Crawley, WA 6009, Australia
- School of Human Sciences, The University of Western Australia, Crawley, WA 6009, Australia
| | - Holly K. Menegola
- Ear Science Institute Australia, Subiaco, WA 6008, Australia; (H.Y.T.); (H.K.M.); (A.P.); (H.T.)
- Ear Sciences Centre, School of Surgery, University of Western Australia, Crawley, WA 6009, Australia
| | - Andrew Peou
- Ear Science Institute Australia, Subiaco, WA 6008, Australia; (H.Y.T.); (H.K.M.); (A.P.); (H.T.)
- School of Human Sciences, The University of Western Australia, Crawley, WA 6009, Australia
| | - Hanadi Tarawneh
- Ear Science Institute Australia, Subiaco, WA 6008, Australia; (H.Y.T.); (H.K.M.); (A.P.); (H.T.)
- Ear Sciences Centre, School of Surgery, University of Western Australia, Crawley, WA 6009, Australia
| | - Dona M. P. Jayakody
- Ear Science Institute Australia, Subiaco, WA 6008, Australia; (H.Y.T.); (H.K.M.); (A.P.); (H.T.)
- Ear Sciences Centre, School of Surgery, University of Western Australia, Crawley, WA 6009, Australia
- WA Centre for Health and Aging, University of Western Australia, Crawley, WA 6009, Australia
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