caa a22 4500 463199502 CHVBK 20180405153108.0 cr unu---uuuuu 170326e20070401xx s 000 0 eng 10.1007/s00276-007-0196-2 doi (NATIONALLICENCE)springer-10.1007/s00276-007-0196-2 The lateral atlantooccipital ligament [Elektronische Daten] [R. Tubbs, William Stetler, Mohammadali Shoja, Marios Loukas, Ake Hansasuta, Peter Liechty, Leslie Acakpo-Satchivi, John Wellons, Jeffrey Blount, E. Salter, W. Oakes] Introduction: Stability of the atlantooccipital joint is of vital importance. The ligaments of this region, for the most part, have been thoroughly investigated, except for the lateral atlantooccipital ligament (LAO), which is not described in most modern texts. Materials and methods: The authors examined 20 adult cadaveric specimens to observe the morphology of the LAO. Results: All specimens were found to have an LAO, bilaterally, immediately posterior to the rectus capitis lateralis muscle with a fiber direction more or less opposite to this muscle. The LAO was found in intimate contact with the vertebral artery posteriorly and with the contents of the jugular foramen anteriorly. In all specimens, the origin of this ligament was from the anterolateral aspect of the transverse process of the atlas and the insertion onto the jugular process of the occipital bone. The fibers of the LAO had a mean angle of 26° from the midline. The mean length and width of this ligament was 2.2 and 0.5cm, respectively. The mean thickness of the LAO was 2mm. The average tensile strength of this band was 37.5°N. The LAO remained lax with flexion and extension of the craniocervical junction. With contralateral lateral flexion of the craniocervical junction, the LAO became fully taut at a mean of 8°. Partial, but never complete, tautness was observed with rotation of the occipital on the atlas bilaterally. Following sectioning of the LAO, approximately an additional 3°-5° of contralateral lateral flexion was observed. Conclusions: The LAO is a constant anatomical structure of the craniocervical junction that might be of concern to the clinician. This ligament inhibits lateral flexion of the atlantooccipital joint and its disruption appears to add to instability at this articulation. Springer-Verlag, 2007 Spine nationallicence Craniocervical junction nationallicence Atlantooccipital joint nationallicence Stability nationallicence Anatomy nationallicence Tubbs R. Department of Cell Biology, University of Alabama at Birmingham, Birmingham, AL, USA aut Stetler William University of Alabama School of Medicine, Birmingham, AL, USA aut Shoja Mohammadali Department of Anatomy and Neurosurgery, Tabriz Medical University, Tabriz, Iran aut Loukas Marios Department of Anatomical Sciences, St George's University, Grenada, West Indies aut Hansasuta Ake Department of Surgery, Division Neurosurgery, Ramathibodi Hospital, Bangkok, Thailand aut Liechty Peter Section of Pediatric Neurosurgery, University of Alabama at Birmingham, Birmingham, AL, USA aut Acakpo-Satchivi Leslie Section of Pediatric Neurosurgery, University of Alabama at Birmingham, Birmingham, AL, USA aut Wellons John Section of Pediatric Neurosurgery, University of Alabama at Birmingham, Birmingham, AL, USA aut Blount Jeffrey Section of Pediatric Neurosurgery, University of Alabama at Birmingham, Birmingham, AL, USA aut Salter E. Department of Cell Biology, University of Alabama at Birmingham, Birmingham, AL, USA aut Oakes W. Section of Pediatric Neurosurgery, University of Alabama at Birmingham, Birmingham, AL, USA aut Surgical and Radiologic Anatomy Springer-Verlag 29/3(2007-04-01), 219-223 0930-1038 29:3<219 2007 29 276 https://doi.org/10.1007/s00276-007-0196-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00276-007-0196-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Tubbs R. Department of Cell Biology, University of Alabama at Birmingham, Birmingham, AL, USA aut NATIONALLICENCE 700 1- Stetler William University of Alabama School of Medicine, Birmingham, AL, USA aut NATIONALLICENCE 700 1- Shoja Mohammadali Department of Anatomy and Neurosurgery, Tabriz Medical University, Tabriz, Iran aut NATIONALLICENCE 700 1- Loukas Marios Department of Anatomical Sciences, St George's University, Grenada, West Indies aut NATIONALLICENCE 700 1- Hansasuta Ake Department of Surgery, Division Neurosurgery, Ramathibodi Hospital, Bangkok, Thailand aut NATIONALLICENCE 700 1- Liechty Peter Section of Pediatric Neurosurgery, University of Alabama at Birmingham, Birmingham, AL, USA aut NATIONALLICENCE 700 1- Acakpo-Satchivi Leslie Section of Pediatric Neurosurgery, University of Alabama at Birmingham, Birmingham, AL, USA aut NATIONALLICENCE 700 1- Wellons John Section of Pediatric Neurosurgery, University of Alabama at Birmingham, Birmingham, AL, USA aut NATIONALLICENCE 700 1- Blount Jeffrey Section of Pediatric Neurosurgery, University of Alabama at Birmingham, Birmingham, AL, USA aut NATIONALLICENCE 700 1- Salter E. Department of Cell Biology, University of Alabama at Birmingham, Birmingham, AL, USA aut NATIONALLICENCE 700 1- Oakes W. Section of Pediatric Neurosurgery, University of Alabama at Birmingham, Birmingham, AL, USA aut NATIONALLICENCE 773 0- Surgical and Radiologic Anatomy Springer-Verlag 29/3(2007-04-01), 219-223 0930-1038 29:3<219 2007 29 276 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer