Transverse ligament of atlas former is attached to the basilar part of the occipital bone, in close relation with the membrana tectoria; the latter is fixed to the posterior surface of the body of the axis; hence, the whole ligament is named the cruciate ligament of the atlas. The transverse ligament divides the ring of the atlas into two unequal parts: of these, the posterior and larger serves for the transmission of the medulla spinalis and its membranes and the accessory nerves; the anterior and smaller contains the odontoid process. The neck of the odontoid process is constricted where it is embraced posteriorly by
Atlas of Genetics and Cytogenetics in Oncology and Haematology a cancer-prone condition and 110 "Deep Insights" on related subjects, 40,000 internal links and 730,000 external links. More than 3,300 authors have/are contributing. It includes an iconography of about 35,000 images. The Atlas is part of the genome project and participates in research on cancer epidemiology. The Atlas is accessed by: 1- researchers in cytogenetics, molecular biology, cell biology; 2- clinicians, haematologists, cytogeneticists, pathologists, from the university hospitals, indeed, but also from general hospitals where the Atlas is one of the rare free resources. Junior doctors in haematology or oncology, are also most receptive to the Atlas that they see