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Details of fibroligamentous structures in the cervical unco-vertebral region: an obscure corner

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Abstract

Vertebral bone, joints and ligaments on the cervical spine are structures that maintain the stability of the spine and protect the neurovascular structures. Determining the detailed anatomical location of the intervertebral foramen and unco-vertebral (UV) region with respect to the vertebral bone, joint and ligaments is critical when choosing the safest surgical approach to the cervical spine. We studied the microscopic detailed anatomy of the dural covering and posterior longitudinal ligament (PLL) in eight cadaver specimens and the relevance of these structures in the UV region from C4 to C7. The uncinate process (UP) and its covering ligaments are mechanical barriers that prevent the nerve root and the vertebral artery against unintentional surgical damage. Dissection at the posterolateral surface of the UP revealed a separate perivascular fibroligamentous tissue (PVFLT) that originates from the PLL. The recognition of the PVFLT may provide for safe surgery by protecting the neural and vascular structures during decompression in the UV region. The French version of this article is available in the form of electronic supplementary material and can be obtained by using the Springer Link server located at http://dx.doi.org/10.1007/s00276-002-0087-5.

Résumé

L'os vertébral, les articulations et les ligaments de la colonne cervicale sont des structures qui maintiennent la stabilité de la colonne vertébrale et protègent les structures neuro-vasculaires. La reconnaissance de la localisation anatomique détaillée du foramen intervertébral et de la région unco-vertébrale, en fonction de l'os vertébral, de l'articulation et des ligaments, est délicate lorsque l'on choisit une voie chirurgicale sûre pour la colonne cervicale. Nous avons étudié l'anatomie microscopique détaillée de la couverture durale et du ligament longitudinal postérieur sur huit cadavres. L'aspect de ces structures dans la région unco-vertébrale a été étudié de C4 à C7. Le processus uncinatus ou uncus et ses ligaments qui le recouvrent sont des barrières naturelles qui préviennent la racine nerveuse et l'artère vertébrale d'une lésion chirurgicale non intentionnelle. La dissection de la surface postéro-latérale de l'uncus révèle un tissu fibro-ligamentaire péri-vasculaire distinct (PVFLT) qui prend son origine du ligament longitudinal postérieur (LLP). L'identification du PVFLT permet une chirurgie sûre en protégeant les structures neurologiques et vasculaires pendant la décompression de la région unco-vertébrale.

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Correspondence to S. Yilmazlar.

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The French version of this article is available in the form of electronic supplementary material and can be obtained by using the Springer Link server located at http://dx.doi.org/10.1007/s00276-002-0087-5

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Yilmazlar, S., Ikiz, I., Kocaeli, H. et al. Details of fibroligamentous structures in the cervical unco-vertebral region: an obscure corner. Surg Radiol Anat 25, 50–53 (2003). https://doi.org/10.1007/s00276-002-0087-5

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