Department of Psychology, College of Humanities and Management, Guizhou University of Traditional Chinese Medicine, No. 4, Dongqing Road, Huaxi District, Guiyang, 550025, China.
Applied Brain Science Lab Interdisciplinary Science and Engineering in Health Systems, Okayama University, 1-1, Tsushimachu 1-chome, Kita-ku, Okayama, 7008530, Japan.
Cereb Cortex. 2024 Aug 1;34(8). doi: 10.1093/cercor/bhae216.
Numerous studies on perceptual training exist, however, most have focused on the precision of temporal audiovisual perception, while fewer have concentrated on ability promotion for audiovisual integration (AVI). To investigate these issues, continuous 5-day audiovisual perceptual training was applied, during which electroencephalography was performed in response to auditory-only (A), visual-only (V) and audiovisual (AV) stimuli before and after training. The results showed that the perceptual sensitivity was greater for training group than for control group and was greater in the posttest than in the pretest. The response to the AV stimulus was significantly faster in the posttest than in the pretest for the older training group but was significantly greater for A and V stimuli for the younger training group. Electroencephalography analysis found higher P3 AVI amplitudes [AV-(A + V)] in the posttest than in the pretest for training group, which were subsequently reflected by an increased alpha (8-12 Hz) oscillatory response and strengthened global functional connectivity (weighted phase lag index). Furthermore, these facilitations were greater for older training groups than for younger training groups. These results confirm the age-related compensatory mechanism for AVI may be strengthened as audiovisual perceptual training progresses, providing an effective candidate for cognitive intervention in older adults.
存在大量关于感知训练的研究，但大多数研究都集中在时间听觉视觉感知的精度上，而较少关注视听整合（AVI）能力的提升。为了研究这些问题，我们进行了连续 5 天的视听感知训练，在训练前后分别对听觉（A）、视觉（V）和视听（AV）刺激进行了脑电图（EEG）反应。结果表明，训练组的感知敏感性大于对照组，且后测大于前测。对于年龄较大的训练组，AV 刺激的反应在后测明显快于前测，而对于年龄较小的训练组，A 和 V 刺激的反应明显更大。脑电图分析发现，训练组在后测中的 P3 AVI 振幅[AV-（A + V）]高于前测，这随后反映在增强的 alpha（8-12 Hz）振荡反应和增强的全局功能连接（加权相位滞后指数）上。此外，对于年龄较大的训练组，这些促进作用大于年龄较小的训练组。这些结果证实，随着视听感知训练的进行，AVI 的年龄相关补偿机制可能会得到加强，为老年人的认知干预提供了一个有效候选方案。
