Marosi E, Harmony T, Becker J, Bernal J, Reyes A, Rodriguez M, Fernandez T
National University of Mexico, ENEP, Iztacala.
Int J Neurosci. 1993 Sep;72(1-2):115-21. doi: 10.3109/00207459308991628.
The idea that sex differences in the execution of different mental tasks mean a different cerebral organization met contradictory results. Sex differences in brain electrical activity were reported by various authors. The EEG coherences show functional and anatomical interrelation, so they may reveal differences in brain organization. This paper tries to demonstrate how sex differences are manifested in EEG coherences, in 42 right-handed control children, 18 girls and 24 boys, aged 7.6 to 13.3. Since the effect of age is high on EEG measurements, regression against age was calculated and eliminated. The Z-transformed coherence values were compared by Student's t-test. The results obtained showed that girls had higher right intrahemispheric coherence values than boys in all bands. These sex differences were more numerous in the theta band. The interhemispheric differences were slight and girls had higher coherences in all bands except for the alpha band, where boys had higher interhemispheric coherence than girls. These results show slight but consistent differences in the functional organization of the right hemisphere by sex and reveal the necessity to elaborate separated EEG norms for boys and girls.
不同心理任务执行过程中的性别差异意味着大脑组织不同这一观点得到了相互矛盾的结果。不同作者报告了大脑电活动中的性别差异。脑电图相干性显示了功能和解剖学上的相互关系，因此它们可能揭示大脑组织的差异。本文试图证明42名右利手对照儿童（18名女孩和24名男孩，年龄在7.6至13.3岁之间）的脑电图相干性如何体现性别差异。由于年龄对脑电图测量的影响很大，因此计算并消除了年龄回归。通过学生t检验比较了Z变换后的相干值。所得结果表明，在所有频段中，女孩的右半球内相干值均高于男孩。这些性别差异在θ频段更为明显。半球间差异较小，除α频段外，女孩在所有频段的相干性都更高，在α频段男孩的半球间相干性高于女孩。这些结果表明，右半球功能组织在性别上存在细微但一致的差异，并揭示了为男孩和女孩制定单独脑电图标准的必要性。
