Is the pterygopalatomaxillary suture (sutura sphenomaxillaris) a growing suture in the fetus?

The pterygopalatomaxillary suture is considered as having an important role in the posteroanterior growing of the maxilla. To determine whether this suture is a growing suture in the fetus, we performed a histological study of this suture in a fetus aged of 16 weeks of amenorrhea. Serial sections (5 microm) of the pterygopalatomaxillary suture area have been performed.

Treatment with dehydroepiandrosterone sulfate increases NMDA receptors in hippocampus and cortex.

Our aim was to investigate if the memory-enhancing effects reported for dehydroepiandrosterone sulfate in rodents could be mediated through modulation of NMDA receptors. Using autoradiography we studied the effect of dehydroepiandrosterone sulfate, administered for 5 days (30 mg/kg, i.p.

[The growth of the maxilla in humans. What place for the premaxilla?].

Introduction: The growth of the maxilla in man is still debated. Many authors described an anterior part of the maxillary bone, called premaxilla distinct from the maxilla proper. This description referred to the existence in animals of an incisive or premaxillary bone which does not exist in man.

[Appearance of the branchial system in cervicofacial embryology].

The aortic arch, vascular component of the branchial segment, is considered as its determining element. This is only justified in the conception of a branchial primordium, although this has now been discarded. The direct objections against this theory of a vascular preeminence are presented.

[Human cervico-facial morphogenesis. Evaluation of acquired data and current outlook. Second part: cervical morphogenesis].

After having recalled the formation of the so-called "branchial" organisation, each component of the segmentary units constituting this organisation is analysed, as well as their particularities. This lead us to recognize the existence of only five branchial arches in the human embryo, without an intermediary arch between the fourth arch and the pulmonary arch. This question is moreover linked to the signification of the so-called "ultimobranchial" body, which must be connected with the fourth pharyngeal pouch.