The variable lunate sulcus was studied and combining our results with those from histological and functional imaging studies, we suggest that the lunate sulci of human and nonhuman primates are not homologous. By comparing the brains of other species, you can see that the human brain has far more, and more pronounced, gyri and sulci than more primitive mammals. The sulci (or fissures) are the grooves and the gyri are the bumps that can be seen on. Any of the narrow fissures separating adjacent convolutions of the brain. A deep, narrow furrow or groove, as in an organ or tissue. cerebral cortex: The cerebrums outer layer of neural. Two lateral occipital sulci (inferior and superior) were defined on the lateral surface of the occipital lobe. Each cerebral hemisphere is divided into four lobes by sulci and gyri. sulci synonyms, sulci pronunciation, sulci translation, English dictionary definition of sulci. sulci: Any of the grooves that mark the convolutions of the surface of the brain (plural of sulcus). The major occipital sulci, particularly the parieto-occipital, the calcarine, the inferior lateral occipital and the anterior occipital sulci, as well as two points of their intersections (cuneal point and intersection of the transverse occipital and superior occipital sulcus) may be used as reliable anatomical landmarks for the location of architectonically and functionally defined human visual areas (V1, V2, V3, V3A, V5/MT+, LO1 and LO2) and during less invasive neurosurgical procedures in the cases of focal lesions within the occipital lobe. Morphological variability of human occipital sulci is related to interindividual and interhemispheric differences in their presence, origin, type, segmentation, intersection and length. Regulation and coordination of movement, posture, balance, rhythm.
We identified, described and measured the lengths of nine major human occipital sulci and five variable ones, comparing both types between individuals and hemispheres. The external morphology of the occipital lobe was investigated in 15 human post-mortem brains (30 hemispheres) fixed in formalin.