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Aging and Sex Influence Cortical Auditory-Motor Integration for Speech Control
Jingting Li1, Huijing Hu2, Na Chen1
1Department of Rehabilitation Medicine, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China.
Older adults show greater vocal adjustments to pitch errors, with aging and sex influencing neural responses in speech control. This research highlights sex differences in the aging neuromotor control of speech production.
Area of Science:
- Neuroscience
- Speech Science
- Gerontology
Background:
- Acoustic changes in speech production are known to decline with age.
- The impact of aging on cortical sensorimotor integration in speech control is not well understood.
Purpose of the Study:
- To investigate the behavioral and neural effects of aging and sex on auditory-motor processing of voice pitch errors.
- To examine how aging influences the cortical sensorimotor integration involved in speech production.
Main Methods:
- An event-related potential (ERP) study was conducted.
- Behavioral vocal compensation and cortical neural responses (N1-P2 complex) to pitch perturbations were measured in young and older adults, stratified by sex.
Main Results:
- Older adults exhibited larger vocal compensations for pitch errors compared to young adults.
- Significant interactions between aging and sex were observed in N1-P2 amplitudes, with older males showing smaller P2 amplitudes than young males.
- Sex differences included faster N1 responses in females and faster P2 responses in young adults.
Conclusions:
- Aging significantly impacts the auditory-motor control of speech production.
- Sex plays a crucial role in understanding the aging neuromotor control of speech, with distinct patterns observed in males and females.
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