Departamento de Psicología Experimental, Facultad de Psicología, Universidad de Sevilla, Sevilla 41018, Spain.
Brain Res Bull. 2010 Apr 5;81(6):525-33. doi: 10.1016/j.brainresbull.2010.01.005. Epub 2010 Jan 18.
The influence of cerebral maturity on the neurocognitive evaluation of target stimuli that have been cued by a spatial directional central cue, which, validly or invalidly, indicates the spatial position of the upcoming target has been investigated. ERPs and behavioural responses were recorded in 18 children and 20 young adults. P3a and P3b amplitudes were analyzed in the valid and invalid trials to assess possible differences between children and young adults. Young adults showed more activation in anterior (P3a) and posterior (P3b) areas in the invalid than the valid condition, whereas children only showed greater activation in P3b. This may be due to the later maturation of the frontal cortex than the more posterior sites. Children also showed a greater P3 component amplitude and a topography shifting to occipital sites, irrespective of the experimental condition.
已经研究了大脑成熟度对被空间方向中央线索提示的目标刺激的神经认知评估的影响，该线索有效或无效地指示了即将到来的目标的空间位置。在 18 名儿童和 20 名年轻人中记录了 ERP 和行为反应。分析了有效和无效试验中的 P3a 和 P3b 幅度，以评估儿童和年轻人之间可能的差异。与有效条件相比，年轻人在无效条件下在前部（P3a）和后部（P3b）区域表现出更多的激活，而儿童仅在 P3b 中表现出更大的激活。这可能是由于额叶皮层的成熟较晚，而更靠后的部位则更早成熟。儿童还表现出更大的 P3 成分幅度和向枕叶部位的地形图转移，而与实验条件无关。
