By using the method of eross-sectional anatomy, we examined human eerebral asymmetries in 31 Chinese adult brain.The left cortical language areas is larger than the right. The distribution of the hemispheric asymmetries is compatible with that reported by CT scan.The asymmetry of the posterior language areas mainly reflect the asymmetry of the occipital length and the asymmetries of the wide occipital lobe and the wide occipital horn might be in relation to the handedness. Though both the anterior and the posterior language area are mostly larger on the left hemisphere,there is no relationship between them