Well-known examples of craniometric points used, included the pterion
, asterion, vertex of the skull, the lambda stephanion glabella and the opisthion.
In general, the pterion
in lateral aspect of the human skull is usually an irregular H shaped suture.
Incise the temporal muscle along the direction of the muscle fibers through pterion
and expand it with the mastoid expander after separation.
Curved skin incision, about 5 cm, was made around the pterion
and followed the lateral hairline curvature.
With the scissors, penetrating deep to the bone in the region of pterion
a cut is made in the bones along the line of skin incision as the foetal bones are thin and membranous in character.
Tambien son aspectos tecnicos importantes: el Asterion (confluencia de la suturas lambdoidea, occipitomastoidea y suturas escamosas, indica la zona de transicion entre los senos transverso y sigmoideo), el ojo de la cerradura (identifica el pterion
e indica la ubicacion de los lobulos frontal, temporal y orbital cavidades), el inion, la glabela, y la linea media (delinea el curso del seno sagital superior).
As such, a pterional craniotomy (named after the area of the skull that is being operated on rather than the area of the underlying brain, in this patient this being the pterion
region of the skull--Figure 4) was performed whereby the skull is opened to remove the tumour.
Midlamdoidea 2; lamda 2; obelion 2; sagital anterior 2; bregma 2; midcoronal 2, pterion
3; esfenofrontal 3; esfetemporal inferior; esfenotemporal superior 2.
Physical examination revealed that approximately 2 cm of the nail (the flathead end) protruded from the right temporal area just posterior to the pterion
On the modified AP, the pterion
, sphenofrontal and superior sphenotemporal sutures were clearly separated, projecting out from the skull.
The third side linked the Pterion
to the Asterion, and the forth side linked the Asterion to the point Lambda thus forming a "tridimensional tetragon".
Yasargil and Fox [sup] further modified the frontal, lateral pterion
approach of Dandy by drilling at the sphenoidal ridge in 1975.