RESUMO
Cognitive function is the advanced features of brain and neonatal cognitive function has its own development characteristics. Quantitative electroencephalogram can reflect the state of brain function directly and objectively and can be used in cognitive research. Event-related potential,induced by stimulation,is the neu-roelectrophysiologic of brain cognitive processing and time-locked to cognitive events. In recent years,research-ers have made great progress in exploring the neonatal cognitive function with the help of quantitative electroen-cephalogram and event-related potential. This review summarizes the progress of these two technologies in neo-natal brain cognitive function.
RESUMO
Objective To investigate the characteristics of cognitive development in different aged neonates.Methods Sixty-two newborns were randomly selected from relatively normal full-term babies in Changzhou Children's Hospital from December 2013 to September 2015.Electroencephalogram (EEG) and event-related potentials (ERP) were recorded with the auditory Oddball paradigm.Cognitive EEG delta power and the N2 wave area of different ages (1-10,11-20 and 21-28 days) were compared.Paired t test,analysis of variance and the LSD test were used for statistical analysis.Results (1) Delta power in the resting and cognition state:neonatal cognitive delta power in the 11-20 and 21-28 days old groups was (268.22± 132.09) and (236.01±97.40) μ V2,respectively,significantly higher than the resting delta power of the same groups [(175.80 ± 80.80) and (178.78 ± 104.74) μ V2,t=2.539 and 2.845,P=0.020 and 0.010,respectively].(2) Cognitive delta power in different aged neonates:cognitive delta power in the 11-20 and 21-28 days old groups was (268.22± 132.09) and (236.01 ±97.40) μ V2,respectively,higher than that of the 1-10 days old group [(116.70± 56.70) μV2],with statistically significant difference (LSD test,both P＜0.05).(3) Neonatal ERP:ERP of the 1-10 days old group presented with multiple peaks of a flat composite wave,in the 11-20 and 21-28 days old groups,the N2 wave showed a regular and rising trend,gradually to a single wave,and became gradually mature.The N2 wave area in the 11-20 and 21-28 days old groups was (6 435.08±2 212.34) and (6 536.75± 1 969.86) ms · μ V,respectively,which was larger than that in the 1-10 days old group [(4 230.04± 1 550.55) ms · μ V] (LSD test,both P＜0.05).Conclusions Neonatal cognitive development is enhanced with age and there may be a period of more rapid cognitive development,especially at 11-20 days of age.