[Superior semicircular canal dehiscence syndrome. Embryological and surgical consideration].

Objective: Presenting the first case of superior semicircular canal dehiscence syndrome in the Spanish literature and to establish, using embryological studies, the period in wich superior semicircular canal dehiscence originates.

Material And Methods: 52 embryos and foetuses, from 6 mm to foetal maturity, were studied. The case of a patient suffering from superior semicircular canal dehiscence syndrome is presented.

[Peculiarities of the parietal organisation of the superficial temporal artery].

Introduction: The study of the structure in the arterial wall has been essential to use vessels in the coronary and cerebral bypass. The superficial temporal artery, owing to its high elastic content and its topography, close to the middle cerebral artery, has made possible the revascularization surgery in cerebral areas with ischemia. AIM.

[Ontogenic peculiarities of the human tympanic ossicular chain].

We have studied the development of the tympanic ossicles in 40 embryo-foetal human series aged between 32 days (6 mm) and newborn. Once performed the measurements to date chronologically embryos and foetuses, we did a meticulous dissection of temporal bones. After fix in 10% formol, decalcified with 2% nitric acid, embedded in Paraplast, sectioned in a sequence of 7 mm, and stained with Martin's trichrome.

[Contribution to the development of the union between the manubrium of the malleus and the tympanic membrane in human fetus].

The development of the union between the manubrium of the malleus and the tympanic membrane was studied in human embryo. For that purpose 25 temporal bones of human foetus, aged from 36 days (14 mm) to 29 weeks (270 mm) were analyzed. Samples were fixed in a 10% formaldehyde solution, decalcified with 2% nitric acid, embedded in Paraplast, cut in sections of 7 microns thick and stained with Martin's trichrome method.

[Structural peculiarities of the human cerebral communicating arteries and their repercussion in encephalic vascular pathology].

Introduction: The cerebrovascular accidents are one of the most frequent causes of morbimortality. Most of them are caused for the break of aneurysms in communicating arteries. The weak structure of these vessels explain the reason of these accidents.