Altered temporal dynamics of neural adaptation in the aging human auditory cortex

被引:35
|
作者
Herrmann, Bjoern [1 ,2 ]
Henry, Molly J. [1 ,2 ]
Johnsrude, Ingrid S. [1 ,3 ]
Obleser, Jonas [2 ,4 ]
机构
[1] Univ Western Ontario, Brain & Mind Inst, Dept Psychol, London, ON, Canada
[2] Max Planck Inst Human Cognit & Brain Sci, Max Planck Res Grp Auditory Cognit, Leipzig, Germany
[3] Univ Western Ontario, Sch Commun Sci & Disorders, London, ON, Canada
[4] Univ Lubeck, Dept Psychol, Lubeck, Germany
基金
加拿大健康研究院;
关键词
Aging; Electroencephalography; Neural adaptation; Temporal context; STIMULUS-SPECIFIC ADAPTATION; EVENT-RELATED POTENTIALS; AGE-RELATED DIFFERENCES; CORTICAL EVOKED-POTENTIALS; LOCAL-FIELD POTENTIALS; HIDDEN HEARING-LOSS; AWAKE GUINEA-PIGS; NEUROMAGNETIC EVIDENCE; INFERIOR COLLICULUS; SELECTIVE ATTENTION;
D O I
10.1016/j.neurobiolaging.2016.05.006
中图分类号
R592 [老年病学]; C [社会科学总论];
学科分类号
03 ; 0303 ; 100203 ;
摘要
Neural response adaptation plays an important role in perception and cognition. Here, we used electroencephalography to investigate how aging affects the temporal dynamics of neural adaptation in human auditory cortex. Younger (18-31 years) and older (51-70 years) normal hearing adults listened to tone sequences with varying onset-to-onset intervals. Our results show long-lasting neural adaptation such that the response to a particular tone is a nonlinear function of the extended temporal history of sound events. Most important, aging is associated with multiple changes in auditory cortex; older adults exhibit larger and less variable response magnitudes, a larger dynamic response range, and a reduced sensitivity to temporal context. Computational modeling suggests that reduced adaptation recovery times underlie these changes in the aging auditory cortex and that the extended temporal stimulation has less influence on the neural response to the current sound in older compared with younger individuals. Our human electroencephalography results critically narrow the gap to animal electrophysiology work suggesting a compensatory release from cortical inhibition accompanying hearing loss and aging. (C) 2016 Elsevier Inc. All rights reserved.
引用
收藏
页码:10 / 22
页数:13
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