“Incidence of Meningo Orbital foramen In Dry Skull and Its Clinical Relevance.”

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Bratisl lek listy2008 109(11)517-519
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it is thought to represent the path by which the anterior
division of middle meningeal artery anastomoses with
lacrimal branch of ophthalmic artery. The meningo orbital
foramen represent an embryonic conduit between the
supra orbital division of the stapeadial artery and the
permanent stem of ophthalmic artery. In adult this may be
represented by a connecting vessel between the orbital
branch of anterior division of middle meningeal artery and
the lacrimal branch of the ophthalmic artery.(Gergiou and
Cassell 1982) The abnormal origin of ophthalmic artery
from the middle meningeal artery is the most commonly
reported in the literature. In two of 170 specimens, the
ophthalmic artery did not arise from the internal carotid
artery but was a branch of the middle meningeal
artery (Hayreh S. S 2006). In the lower animals, the
ophthalmic artery is derived from the external carotid
artery, but as we go up the evolutionary ladder of the
animal kingdom, the ophthalmic artery tends to arise from
the internal carotid instead of the external carotid.
For example, although rhesus monkeys have a normal
ophthalmic artery, a large lacrimal artery connects both the
ophthalmic artery and the middle meningeal artery, so that
the middle meningeal artery contributes a significant blood
supply to the orbit, in addition to the ophthalmic artery
(Hayreh SS. 1964). The presence of the cranio-orbital
foramen and other accessory foramina represents a source of
hemorrhage that surgeons should be aware of when
operating along the lateral orbital wall. Practical importance
is emphasized when the middle mennigeal artery has
abnormal origin in the case of sub temporal epidural
heamatoma, tumors vascular malformations and in case
when the foramen spinosum is absent. (McLenn J E, et al
1974).It is described as alternative transorbital pathway
(Dimond M 1991).Finally we like conclude that the
meningo-orbital foramen is found more then 30% cases and
as it is important vascular link between orbit and cranium,
so clinical significance is evident.
Indian Journal of Basic & Applied Medical Research; March 2013: Issue-6, Vol.-2, P. 514-517
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