![]() ![]() Su forma de presentación depende de la unión del 3º y 4º arcos aórticos. Las características de la división arterial representan un factor de riesgo para la oclusión arterial y causa frecuente de dificultad para la cateterización. ![]() Morphometric measurements from this study may be useful in interpreting radiographic images of the cervical spine obtained using computed tomography or cervical angiograms.Chair and Institute of Normal Anatomy, Faculty of Medical Sciences, National University of Cordoba, Cordobaīrachiocephalic trunk, great vessels, arterial embryology, arterial occlusion, tronco braquiocefálico, grandes vasos, embriología arterial, oclusión arterial Resumen Anatomical knowledge of FT variations is surgically pertinent, as in such conditions the vertebral artery may become twisted or deformed and result in vertebrobasilar insufficiency. CONCLUSION: Differences in number (duplication), size, and shape of the FTs are not uncommon phenomena. Type 1 was predominant on the right side, whereas type 4 was predominant on the left side. FTs with very small diameter (<3.5 mm) were found mostly in C7 followed by C5 and C6. The difference was not statistically significant. The mean values of the anteroposterior and transverse FT diameters on the right side were 4.96 ± 1.08 and 5.68 ± 1.20 mm, respectively, and on the left side were 5.07 ± 1.12 and 5.76 ± 1.29 mm, respectively. Accessory foramina occurred in a particular pattern, with incidence increasing with descending order of cervical vertebrae, and were most commonly found in C7. ![]() Bilateral accessory foramina were slightly more common than a unilateral accessory foramen. RESULTS: Accessory foramina were found in 40 cervical vertebrae. The foramina were classified according to their shape depending upon the direction of their main diameter. MATERIAL and METHODS: The FTs of 200 dry cervical vertebrae (C3-C7) from 40 spines were studied for the presence of variations in their number (single, double, or triple), size, and shape. AIM: To examine the variations in number, size, and shape of foramina transversaria (FTs) of cervical vertebrae, and to discuss their clinical importance. ![]()
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