Impact of hearing loss on brain signal variability in older adults under different auditory load conditions

Frontiers in Aging Neuroscience, Journal Year: 2025, Volume and Issue: 17

Published: Feb. 27, 2025

The moment-by-moment variability in brain signals, a newly recognized indicator, demonstrates both the adaptability of an individual's as unique trait and distribution neural resources within that individual response to constantly shifting task requirements. This study aimed explore signal older adults using oxyhemoglobin (HbO) derived from fNIRS during tasks with increasing signal-to-noise ratio (SNR) loads assess effects varying degrees hearing loss on speech recognition performance related patterns. Eighty-one participants were categorized into three groups: healthy controls (n = 30, aged 65.5 ± 3.4), mild 25, 66.0 3.7), moderate severe 26, 67.5 3.7). Speech perception was tested under quiet, 5 dB SNR, 0 SNR conditions. Results revealed increased higher adults, indicating enhanced resource allocation load. In contrast, we found reduced tasks, especially noisy conditions, groups, possibly decreased processing efficiency. Additionally, positive correlation between observed control across all suggesting could dynamically respond precise level auditory environment demands. However, this relationship only significant at condition groups. Taken together, underscores impact modulation cognitive highlights need for further research understand underlying mechanisms.

Language: Английский

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Neural processing of speech comprehension in noise predicts individual age using fNIRS-based brain-behavior models

Cerebral Cortex, Journal Year: 2024, Volume and Issue: 34(5)

Published: May 1, 2024

Abstract Speech comprehension in noise depends on complex interactions between peripheral sensory and central cognitive systems. Despite having normal hearing, older adults show difficulties speech comprehension. It remains unclear whether the brain’s neural responses could indicate aging. The current study examined individual brain activation during perception different listening environments predict age. We applied functional near-infrared spectroscopy to 93 normal-hearing human (20 70 years old) a sentence task, which contained quiet condition 4 signal-to-noise ratios (SNR = 10, 5, 0, −5 dB) noisy conditions. A data-driven approach, region-based brain-age predictive modeling was adopted. observed significant behavioral decrease with age under conditions, but not condition. Brain activations SNR 10 dB successfully individual’s Moreover, we found that bilateral visual cortex, left dorsal pathway, cerebellum, right temporal–parietal junction area, homolog Wernicke’s middle temporal gyrus contributed most prediction performance. These results demonstrate of regions about sensory-motor mapping sound, especially be sensitive measures for than external behavior measures.

Language: Английский

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Compensatory Mechanisms for Preserving Speech-in-Noise Comprehension Involve Prefrontal Cortex in Older Adults

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: March 13, 2024

Abstract The capacity of comprehending others amidst noise is essential for human communication. However, it presents significant challenges the elderly who often face progressive declines in peripheral auditory system and whole brain. While previous studies have suggested existence neural reserve compensation as potential mechanisms preserving cognitive abilities aging, specific supporting speech-in-noise comprehension among remain unclear. To address this question, present study employs an inter-brain neuroscience approach by analyzing coupling between brain activities older adults those speakers under noisy conditions. Results showed that encompassed more extensive regions listeners compared to young listeners, with a notable engagement prefrontal cortex. Moreover, from cortex was coordinated classical language-related regions. More importantly, background increases, listener’s speech performance closely associated Taken together, reveals compensatory recruitment neurocognitive resources, particularly within cortex, facilitate processing aging brain, further highlights critical role maintaining elderly’s ability comprehend environments. It supports hypothesis, extending knowledge about basis underlies preservation population.

Language: Английский

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Execution Processes in Adults 50+ Years: The Effect of Advanced Age on Copy-Typing

Published: Jan. 1, 2024

AbstractBackground:Writing has long been recognized for its potential to support cognitive processes, particularly in the elderly population. The effectiveness of this hinges on automaticity motor execution during writing, either by typing or handwriting. Without such automaticity, load writing may be too high, negating any benefits.Methods:To explore how tasks changes with age, we conducted a study involving 419 participants aged between 49 and 84 years. We assessed their abilities had them perform copy task. During task, used keylogging program InputLog strings characters, phrases, sentences as quickly possible.Results:Analysis through regression models interkeystroke intervals (IKIs) accuracy revealed that while motoric speed decreases probability making errors did not significantly increase. This indicates although older adults type slower, precision remains intact.Conclusion:Given growing importance keyboard use personal communication among adults, our findings suggest declines fluency might maintained regular practice. Consequently, activities could effectively method training memory capacities elderly.

Language: Английский

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Impact of age-related hearing loss on decompensation of left DLPFC during speech perception in noise: a combined EEG-fNIRS study

GeroScience, Journal Year: 2024, Volume and Issue: unknown

Published: Oct. 24, 2024

Abstract Understanding speech-in-noise is a significant challenge for individuals with age-related hearing loss (ARHL). Evidence suggests that increased activity in the frontal cortex compensates impaired speech perception healthy aging older adults. However, whether adults ARHL still show preserved compensatory function and specific neural regulatory mechanisms underlying such compensation remains largely unclear. Here, by utilizing synchronized EEG-fNIRS test, we investigated oscillatory characteristics of theta band synchronous hemodynamic changes during recognition task noise. The study included ( n = 26, aged 65.4 ± 2.8), those mild 66.3 3.8), moderate to severe 67.5 3.7). Results showed that, relative adults, exhibited lower activation weakened oscillations left dorsolateral prefrontal (DLPFC) under noisy conditions, this decreased correlated high-frequency loss. Meanwhile, found connectivity frontoparietal network was significantly reduced, which might depress top-down articulatory prediction affecting performance results suggested exhibit attentional resource recruitment through auditory-motor integration mechanism. In comparison, reflected decompensation DLPFC involving tasks

Language: Английский

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Neural correlates of music familiarity and likability in hospital noise masking: A functional near-infrared spectroscopy study

The Journal of the Acoustical Society of America, Journal Year: 2024, Volume and Issue: 156(6), P. 4269 - 4278

Published: Dec. 1, 2024

Subjective factors of music have been proven to significantly influence the effect masking, while neural mechanism masking is unknown. This study aims explore by which improves subjective perception noise in population. A total 40 healthy subjects were recruited for both evaluation and functional near-infrared spectroscopy scanning during hospital noise. Annoyance reduction percentage (ARP), likability, familiarity, brain response data collected analyzed. The results showed that increasing ARP likability was correlated with activation bilateral dorsal–lateral superior frontal gyrus (DLPFC) orbital middle (OFC), improvement familiarity activated triangular inferior gyrus, supramarginal temporal gyrus. repeatedly channels located DLPFC OFC indicate may play a key role reducing annoyance through masking. provides scientific basis selection future management hospitals.

Language: Английский

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