Lippé Sarah, Kovacevic Natasa, McIntosh Anthony Randal
Centre de Recherche CHU Ste-Justine, University of Montreal Montreal, Quebec, Canada.
Front Hum Neurosci. 2009 Nov 16;3:48. doi: 10.3389/neuro.09.048.2009. eCollection 2009.
Brain development carries with it a large number of structural changes at the local level which impact on the functional interactions of distributed neuronal networks for perceptual processing. Such changes enhance information processing capacity, which can be indexed by estimation of neural signal complexity. Here, we show that during development, EEG signal complexity increases from one month to 5 years of age in response to auditory and visual stimulation. However, the rates of change in complexity were not equivalent for the two responses. Infants' signal complexity for the visual condition was greater than auditory signal complexity, whereas adults showed the same level of complexity to both types of stimuli. The differential rates of complexity change may reflect a combination of innate and experiential factors on the structure and function of the two sensory systems.
大脑发育在局部水平伴随着大量结构变化，这些变化会影响用于感知处理的分布式神经元网络的功能相互作用。此类变化增强了信息处理能力，这可以通过神经信号复杂性的估计来衡量。在此，我们表明在发育过程中，脑电图（EEG）信号复杂性在1个月至5岁期间因听觉和视觉刺激而增加。然而，两种反应的复杂性变化率并不相同。婴儿视觉条件下的信号复杂性大于听觉信号复杂性，而成年人对两种类型刺激的复杂性水平相同。复杂性变化的差异率可能反映了先天因素和经验因素对两种感觉系统的结构和功能的综合影响。
