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An Anatomical Study of the Occipito-Cervical Connection. Prevention of Vertebral Artery Injury during the Posterior Approach to the Occipito-Cervical Connection Takatomo Moro 1 , Shin-ichi Kikuchi 2 , Shin-ichi Konno 2 1Division of Orthopaedic Surgery, Shirakawa Kousei General Hospital 2Department of Orthopaedic Surgery, Fukushima Medical University, School of Medicine Keyword: 頭蓋・頚椎移行部 , occipito-cervical connection , 椎骨動脈損傷 , vertebral artery injury , 解剖学的研究 , anatomical study pp.173-176
Published Date 2009/2/25
DOI https://doi.org/10.11477/mf.1408101456
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 With the aim of preventing vertebral artery injuries when using a posterior approach at the occipito-cervical connection, we examined the anatomical positional relationships of the vertebral artery in cadavers available for anatomical dissection. We also examined the anatomical relationship between the first and second cervical nerves. The maximum distance between the midline and the site of entry of the vertebral artery into the atlanto-occipital interosseous membrane was 19mm. Based on this finding, we concluded that the safe margin for an avulsion procedure on the posterior surface of the first cervical vertebra is no more than 19mm laterally. Also, in every the cadaver site of emergence of the second cervical nerve from the lower border of the lamina of the atlas was media to the site of entry of the cervical artery into the atlanto-occipital interosseous membrane. When performing an avulsion from the midline, it is necessary to confirm the site of emergence of the second cervical nerve from the inferior border of the lamina of the atlas and to use it as a landmark for the vertebral artery.


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電子版ISSN 1882-1286 印刷版ISSN 0557-0433 医学書院

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