Cortical thickness of the left parahippocampal cortex links central hearing and cognitive performance in aging

Author:

Li Rui12ORCID,Miao Xiaoyan3,Han Buxin12,Li Juan12

Affiliation:

1. CAS Key Laboratory of Mental Health Institute of Psychology Beijing China

2. Department of Psychology University of Chinese Academy of Sciences Beijing China

3. Department of Psychology and Special Education Research National Institute of Education Sciences Beijing China

Abstract

AbstractHearing impairment is considered a leading modifiable risk factor of cognitive decline and dementia. While most evidence has been established on clinical assessment of peripheral hearing loss, understanding of how central hearing in real‐world conditions is associated with cognitive aging is limited. This study analyzed the data of 473 unrelated healthy adults aged 36–100 years old from the Lifespan Human Connectome Project in Aging. Central hearing was evaluated using the Words‐in‐Noise decibel threshold. Cognitive functions were evaluated by the performance on cognitive tests, and cortical thickness was estimated from magnetic resonance imaging (MRI) data. Here, we show that a higher hearing threshold was associated with a lower performance on immediate and delayed episodic memory retrieval, switching aspect of executive function, working memory, reading decoding, and vocabulary comprehension. Cortical thickness in the left parahippocampal cortex (lPHC) was negatively associated with the hearing threshold and acted as a significant partial mediator in the association of central hearing with immediate recall, switching, reading decoding, and vocabulary comprehension. These findings suggest that cortical thickness in the lPHC, an early target of dementia, partially links central hearing and performance in multiple cognitive domains in aging.

Funder

National Key Research and Development Program of China

National Natural Science Foundation of China

Publisher

Wiley

Subject

History and Philosophy of Science,General Biochemistry, Genetics and Molecular Biology,General Neuroscience

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