P. K. Anokhin Research Institute of Normal Physiology, Moscow, Russia.
Bull Exp Biol Med. 2023 Jul;175(3):295-299. doi: 10.1007/s10517-023-05855-6. Epub 2023 Aug 11.
The effect of lateralized optical stimulation with a frequency of 10 Hz on the effectiveness of cognitive task performance (n-back test) was studied in 33 healthy subjects (right-handed men). Test visual information was presented to the right or left visual hemifield under normal conditions and against the background of optical stimulation with a frequency of 10 Hz. The absolute values of the spectral power of the high (10-13 Hz) subrange of alpha-rhythm of EEG (SPα2) were calculated. When test information was sent to the right hemisphere against the background of stimulation, an increase in task performance was revealed in subjects with low SPα2. This was accompanied by an increase in SPα2 in some cortical areas of the contralateral (left) hemisphere and, as a result, an increase in left-side dominance of SPα2. The findings indicate the possibility of using lateralized optical stimulation to improve cognitive task performance, in particular, by changing the interhemispheric asymmetry of the EEG alpha2-rhythm.
研究了以 10 Hz 频率进行侧化光刺激对认知任务表现（n-back 测试）效果的影响，共有 33 名健康受试者（右利手男性）参与。在正常条件下和以 10 Hz 频率进行光刺激的背景下，向右侧或左侧视野呈现测试视觉信息。计算了 EEG（SPα2）的高频（10-13 Hz）亚带α节律的绝对谱功率（SPα2）的绝对值。当以刺激为背景向右侧半球发送测试信息时，在 SPα2 值较低的受试者中发现任务表现提高。这伴随着对侧（左侧）半球某些皮质区域的 SPα2 增加，结果是 SPα2 左侧优势增加。这些发现表明，使用侧化光刺激改善认知任务表现的可能性，特别是通过改变 EEGα2 节律的半球间不对称性。
