J. Moret

Occipital approach for treatment of arteriovenous malformation of the vertebral artery by balloon occlusion.

SummaryThe successful treatment of a congenital vertebral fistula with the balloon catheter occlusion technique is reported. A new approach is presented (the occipital approach), based upon the pathological enlargement of the second intervertebral space anastomosis between occipital and vertebral arteries.

Collatérales C5 du Siphon Carotidien: Embryologie, Corrélations Radio-Anatomiques, Radio-Anatomie Pathologique

Since Parkinsons original description, the Cs collaterals are always presented as originating from a common trunk (meningo-hypophyseal). This is the least frequent anatomiCal variation. In fact, the posterior (Cs) group of collaterals corresponds to the remnant of two transient embryonic vessels (primitive maxillary and trigeminal arteries), branches of which will give rise to the two main groups of collaterals originating from this area: medially, the inferior hypohyseal and the medial clival arteries; laterally, the basal tentorial and lateral clival arteries, which are constantly anastomosed with the ascending pharyngeal artery. Only in some cases (10%) do these two groups arise in common from the C; carotid siphon. Apart from these branches the so-called Bernasconis artery may originate from eight different pedicles, the Cs siphon respresenting only one of them.

Exploration artériographique du Nerf Facial Intra-Pétreux: Embryologie et Aspect Radio-Anatomiques Normaux

SummaryThe normal development of the hyoidostapedial system and its branches and anastomosis are outlined. The intrapetrous facial nerve receives its arterial supply from this network. The arterial arch of the facial nerve is seen more frequently in angiograms of infants than in those of adults. The fact that the same vessel supplies the VIIth and the Vth nerves suggests that an ischemic mechanism may frequently be involved in Bells palsy. The facial nerve from the point of view of its arterial supply must be considered as a nerve of the middle fossa and represent the major risk of embolization in the propinal middle meningeal artery.The normal development of the hyoidostapedial system and its branches and anastomosis are outlined. The intrapetrous facial nerve receives its arterial suplly from the network. The arterial arch of the facial nerve is seen more frequently in angiograms of infants than in those of adults. The fact that the same vessel supplies the VIIth and the Vth nerves suggests that an ischemic mechanism may frequently be involved in Bells palsy. The facial nerve from the point of view of its arterial supply must be considered as a nerve of the middle fossa and represent the major risk of embolization in the propinal middle meningeal artery.

Exploration artriographique du Nerf Facial Intra-Ptreux: Embryologie et Aspect Radio-Anatomiques Normaux@@@Arteriographic exploration of the intrapetrous facial nerve: Embryology and normal radiologic anatomy

SummaryThe normal development of the hyoidostapedial system and its branches and anastomosis are outlined. The intrapetrous facial nerve receives its arterial supply from this network. The arterial arch of the facial nerve is seen more frequently in angiograms of infants than in those of adults. The fact that the same vessel supplies the VIIth and the Vth nerves suggests that an ischemic mechanism may frequently be involved in Bells palsy. The facial nerve from the point of view of its arterial supply must be considered as a nerve of the middle fossa and represent the major risk of embolization in the propinal middle meningeal artery.The normal development of the hyoidostapedial system and its branches and anastomosis are outlined. The intrapetrous facial nerve receives its arterial suplly from the network. The arterial arch of the facial nerve is seen more frequently in angiograms of infants than in those of adults. The fact that the same vessel supplies the VIIth and the Vth nerves suggests that an ischemic mechanism may frequently be involved in Bells palsy. The facial nerve from the point of view of its arterial supply must be considered as a nerve of the middle fossa and represent the major risk of embolization in the propinal middle meningeal artery.

Participation de l’Artère Méningée Moyenne à la Vascularisation de la Fosse Postérieure

SummaryThe middle meningeal artery can sometimes supply the complete vascularisation of the posterior fossa, i.e., the dura mater of the cerebellar fossa and the tentorium cerebelli. The authors present an anatomic and radiologic correlative study based upon an unusual case where the middle meningeal artery arose from the ascending pharyngeal artery and vascularised the entire posterior cerebellar fossa.The middle meningeal artery can sometimes supply the complete vascularisation of the posterior fossa, i.e., the dura mater of the cerebellar fossa and the tentorium cerebelli. The authors present an anatomic and radiologic correlative study based upon an unusual case where the middle meningeal artery arose from the ascending pharyngeal artery and vascularised the entire posterior cerebellar fossa.

Collatrales C5 du siphon carotidien: Embryologie, corrlations radio-anatomiques, radio-anatomie pathologique@@@C5 collaterals of the internal carotid siphon: Embryology, angiographic anatomical correlations, pathological radio-anatomy

Since Parkinsons original description, the C5 collaterals are always presented as originating from a common trunk (meningo-hypophyseal). This is the least frequent anatomical variation. In fact, the posterior (C5) group of collaterals corresponds to the remnant of two transient embryonic vessels (primitive maxillary and trigeminal arteries), branches of which will give rise to the two main groups of collaterals originating from this area: medially, the inferior hypophyseal and the medial clival arteries; laterally, the basal tentorial and lateral clival arteries, which are constantly anastomosed with the ascending pharyngeal artery. Only in some cases (10%) do these two groups arise in common from the C5 carotid siphon. Apart from these branches the so-called Bernasconis artery may originate from eight different pedicles, the C5 siphon representing only one of them.SummarySince Parkinsons original description, the C5 collaterals are always presented as originating from a common trunk (meningo-hypophyseal). This is the least frequent anatomical variation. In fact, the posterior (C5) group of collaterals corresponds to the remnant of two transient embryonic vessels (primitive maxillary and trigeminal arteries), branches of which will give rise to the two main groups of collaterals originating from this area: medially, the inferior hypohyseal and the medial clival arteries; laterally, the basal tentorial and lateral clival arteries, which are constantly anastomosed with the ascending pharyngeal artery.Only in some cases (10%) do these two groups arise in common from the C5-carotid siphon. Apart from these branches the so-called Bernasconis artery may originate from eight different pedicles, the C5 siphon respresenting only one of them.

Participation de l'artre mninge moyenne la vascularisation de la fosse postrieure@@@The middle meningeal blood supply to the posterior fossa

SummaryThe middle meningeal artery can sometimes supply the complete vascularisation of the posterior fossa, i.e., the dura mater of the cerebellar fossa and the tentorium cerebelli. The authors present an anatomic and radiologic correlative study based upon an unusual case where the middle meningeal artery arose from the ascending pharyngeal artery and vascularised the entire posterior cerebellar fossa.The middle meningeal artery can sometimes supply the complete vascularisation of the posterior fossa, i.e., the dura mater of the cerebellar fossa and the tentorium cerebelli. The authors present an anatomic and radiologic correlative study based upon an unusual case where the middle meningeal artery arose from the ascending pharyngeal artery and vascularised the entire posterior cerebellar fossa.

Etude angiographique des paralysies faciales@@@Angiographic study of facial paralyses

Many arguments lead us to think that a possible etiologic factor in idiopathic Bells palsy is the ischemia of the facial nerve and that angiography could help in diagnosis: (1) the rapid progress of the paralysis; (2) the correlation between Bells palsy occurring after embolization of the internal maxillary artery, the middle meningeal artery, the occipital or posterior auricular artery, and their participation in the blood supply of the facial nerve; (3) the already known ischemic third nerve paralysis reported in diabetes and extending further to the facial nerve. Even if it is technically impossible to study Bells palsy by angiography, it is interesting to understand and consider some complications of embolization and perhaps to envisage a new kind of treatment.SummaryMany arguments lead us to think that a possible etiologic factor in idiopathic Bells palsy is the ischemia of the facial nerve and that angiography could help in diagnosis: (1) the rapid progress of the paralysis; (2) the correlation between Bells palsy occurring after embolization of the internal maxillary artery, the middle meningeal artery, the occipital or posterior auricular artery, and their participation in the blood supply of the facial nerve; (3) the already known ischemic third nerve paralysis reported in diabetes and extending further to the facial nerve.Even if it is technically impossible to study Bells palsy by angiography, it is interesting to understand and consider some complications of embolization and perhaps to envisage a new kind of treatment.

Etude Angiographique des Paralysies Faciales

Many arguments lead us to think that a possible etiologic factor in idiopathic Bell’s palsy is the ischemia of the facial nerve and that angiography could help in diagnosis: (1) the rapid progress of the paralysis; (2) the correlation between Bell’s palsy occurring after embolization of the internal maxillary artery, the middle meningeal artery, the occipital or posterior auricular artery, and their participation in the blood supply of the facial nerve; (3) the already known ischemic third nerve paralysis reported in diabetes and extending further to the facial nerve.