Jorge Miró

Learn More
To study the role of brain serotonin in entrance into hibernation, intraventricular injections of 5,7-dihydroxytryptamine, electrolytic lesions of small parts of the median raphe nucleus, and chemical lesions of the same nucleus were undertaken on the European hamster in winter. All the lesions led to a variable decrease of serotonin levels in all parts of(More)
MCMC-based methods are important for Bayesian inference of phylogeny and related parameters. Although being computationally expensive, MCMC yields estimates of posterior distributions that are useful for estimating parameter values and are easy to use in subsequent analysis. There are, however, sometimes practical difficulties with MCMC, relating to(More)
The lipid composition of whole brain hemispheres and subcellular fractions of European Hamsters (Cricetus cricetus) was investigated at four different periods of the year. 1. No difference was observed in winter between hibernating animals and active animals awake for 24 hr. 2. A slight increase of cholesterol/phospholipid molar ratio was observed in(More)
In the European hamster, Cricetus cricetus, a common hibernator, over a year, the gamma-aminobutyric acid (GABA) content has been followed, in the cytosolic and crude synaptosomal fractions of the olfactory bulbs, hypothalamus and cerebellum. In these 3 areas, the GABA content shows circannual variations of endogenous origin: in this period, in both(More)
Serotonin levels and turnover were measured in different brains areas of full bulbectomized and partially bulbectomized European hamsters and their controls. Full bulbectomized hamsters did not hibernate and ate more than the two other groups in which hibernation patterns were similar. The levels of serotonin were of the same magnitude in the three groups.(More)
Olfactory bulbectomy was performed on wild male European hamsters at different phases of their circannual body weight rhythm. Olfactory bulbectomy was always followed by an immediate hyperphagia the magnitude of which varied with the time of the year it was performed. The bulbectomy did not affect the phase of the circannual body weight rhythm, although in(More)
Chordomas are dysembryogenic tumors originating from the notochordal process. The case of a 9-month-old male infant with involvement of the ethmoidal sinus and anterior fossa is reported. These tumors are rare in ENT practice and in children arise in the clivus. The diagnosis was made by biopsy, CT and MRI. Surgery is the only effective treatment, with(More)