ABSTRACT
1.200 cerebral hemispheres were used to observe the morphology of the brain sulci. 2.The superior and inferior frontal sulci not only run from tbe precentral sulcus or in the front of it,but also run behind it. 3.The posterior end of the collateral sulcus may extend to the superolateral sur- face of the occipital lobe. 4.The orbital sulci are irregular but generally are of the ?-shaped and H- shaped. 5.Anterio-superiorly to the cingulate sulcus a parallel accessory cingulate sulcus is usually present. 6.The intraparietal and intraoccipital sulci are usually continuous. 7.The superior and inferior transverse occipital sulci are present at the same time,being over 80% of the total number. 8.The parieto-occipital sulcus which commences on the superolateral surface is over 90% of the total number. 9.The calcarine sulcus is divided into four types,among which the“superior convex”and “linear”types are present more often. 10.Most of the superior sagittal cunuate sulcus and the inferior sagittal cunuate sulcus are present. 11.The lingual sulcus is constant.Its configuration is changed,following the change of the posterior part of the calcarine fissure and the posterior end of the collateral sulcus.