Araneda Rodrigo, Silva Moura Sandra, Dricot Laurence, De Volder Anne G
Motor Skill Learning and Intensive Neurorehabilitation Laboratory (MSL-IN), Institute of Neuroscience (IoNS; COSY Section), Université Catholique de Louvain, 1200 Brussels, Belgium.
Institute of Neuroscience (IoNS; NEUR Section), Université Catholique de Louvain, 1200 Brussels, Belgium.
Life (Basel). 2021 Mar 31;11(4):296. doi: 10.3390/life11040296.
Using functional magnetic resonance imaging, here we monitored the brain activity in 12 early blind subjects and 12 blindfolded control subjects, matched for age, gender and musical experience, during a beat detection task. Subjects were required to discriminate regular ("beat") from irregular ("no beat") rhythmic sequences composed of sounds or vibrotactile stimulations. In both sensory modalities, the brain activity differences between the two groups involved heteromodal brain regions including parietal and frontal cortical areas and occipital brain areas, that were recruited in the early blind group only. Accordingly, early blindness induced brain plasticity changes in the cerebral pathways involved in rhythm perception, with a participation of the visually deprived occipital brain areas whatever the sensory modality for input. We conclude that the visually deprived cortex switches its input modality from vision to audition and vibrotactile sense to perform this temporal processing task, supporting the concept of a metamodal, multisensory organization of this cortex.
在此，我们利用功能磁共振成像技术，在节拍检测任务期间监测了12名早期失明受试者和12名年龄、性别及音乐体验相匹配的蒙眼对照受试者的大脑活动。受试者需要辨别由声音或振动触觉刺激组成的规则（“节拍”）与不规则（“无节拍”）节奏序列。在两种感觉模式下，两组之间的大脑活动差异涉及异模态脑区，包括顶叶和额叶皮质区域以及枕叶脑区，这些脑区仅在早期失明组中被激活。因此，早期失明会引起参与节奏感知的大脑通路的可塑性变化，无论输入的感觉模式如何，视觉剥夺的枕叶脑区都会参与其中。我们得出结论，视觉剥夺的皮层会将其输入模式从视觉转换为听觉和振动触觉感觉，以执行这一颞叶加工任务，这支持了该皮层具有超模态、多感觉组织的概念。
