basion


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basion

[′bās·ē‚än]
(anatomy)
In craniometry, the point on the anterior margin of the foramen magnum where the midsagittal plane of the skull intersects the plane of the foramen magnum.
References in periodicals archive ?
BASION (Ba) (lower most point on the anterior rim of foramen magnum)
La linea de Mc Rae es la linea del plano del agujero magno trazada desde el basion al opistion y habitualmente la apofisis odontoides no rebasa los limites de este plano.
The DC point is marked, superimposed at basion point on the Ba-N plane.
The plane of the foramen magnum (gray line) is defined by the interconnection of the opisthion with the basion points of the skull.
The measurement of thickness of basion posterior airway wall and AA (most anterior point on the anterior arch of the atlas vertebrae)-posterior airway wall revealed a significant decline from the preoperative status to the postoperative status.
The basion-dens interval (BDI, distance from basion to upper odontoid tip) should be <12 mm in 95% of patients.
Basion and Ophisthion were marked 'A' and 'B' respectively (Figure 1).
Ba (Basion): The most inferior posterior point on the anterior margin of the foramen magnum.
Oh comment ils en ont a basion. Hamid qui a accumule une expertise de 20 ans en la matiere gagne, lui aussi, 3000 dh par mois.
Mas superficialmente se configuran dos grupos de raices que perforan la duramadre encefalica en la zona de la fosa craneal posterior por detras y lateralmente al basion (punto medio anterior del foramen magno u occipital) para fusionarse y abandonar el craneo a traves del foramen condileo anterior, tambien denominado canal o conducto para el nervio hipogloso [22,23].
Ba(Basion): punto posteroinferior del hueso occipital en el margen anterior del foramen magnum.
Basion (Ba): The midpoint of the anterior margin of the foramen magnum.