caa a22 4500 445357819 CHVBK 20180317142906.0 cr unu---uuuuu 170323e20111201xx s 000 0 eng 10.1007/s10072-011-0693-2 doi (NATIONALLICENCE)springer-10.1007/s10072-011-0693-2 Raybaud Charles Department of Neuroradiology, Hospital for Sick Children, University of Toronto, M5G1X8, Toronto, ON, Canada aut Anatomy and development of the craniovertebral junction [Elektronische Daten] [Charles Raybaud] The occipital bone is the upper end of the somatic spine, limited cranially by the tentorium. The bony craniovertebral junction (caudal occiput, atlas, and axis) is interposed between the unsegmented occipital and the intersegmental spinal sclerotomes, separated from the occiput and C3 by the intrasegmental clefts of O4 and C2 sclerotomes, respectively. It retains a primitive segmental hypocentrum (anterior arch of C1) and is unsegmented from caudal O4 to cranial C2 half-sclerotomes (axis). Its morphology relates to the dual function of providing support and mobility (visual/olfactory/auditory pursuit, oral prehension) to the head. The early notochord passes through the odontoid tip to the basiocciput surface before entering the clivus up to the craniopharyngeal canal; later, the rostralmost chordal remnant is the C2/3 nucleus pulposus. Chondrification starts in the second fetal month and ossification in the fetal or postnatal periods depending on the structure. Springer-Verlag, 2011 Craniovertebral junction nationallicence Anatomy nationallicence Craniovertebral junction instability nationallicence Spine development nationallicence Spine malformation nationallicence Neurological Sciences Springer Milan 32(2011-12-01), 267-270 1590-1874 32<267 2011 32 10072 https://doi.org/10.1007/s10072-011-0693-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10072-011-0693-2 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Raybaud Charles Department of Neuroradiology, Hospital for Sick Children, University of Toronto, M5G1X8, Toronto, ON, Canada aut NATIONALLICENCE 773 0- Neurological Sciences Springer Milan 32(2011-12-01), 267-270 1590-1874 32<267 2011 32 10072 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer