RESUMO
A simple photographic method for histological sections is described. This is a contact method which does not require the use of photographic camera. It is very similar to the contact print method used routinely in photographic laboratories. It is performed by placing the slides with the histological section, coverslip downwards, over the emulsion of the negative film. Then, they are illuminated with a common photographic enlarger during a brief period of time. Thus, a negative contact print of the section is obtained. This technique yields photographs of high quality focus, sharply contrasted with great detail. These results may also be obtained with low-contrast stained sections. This method is most suitable for photography of large or medium-sized histological sections (macros). This is often the case of neuroanatomical and immunohistochemical studies. Our method, being simple and quick, is recommended for routine use in laboratories
Assuntos
Técnicas Histológicas , FotomicrografiaRESUMO
The most salient neuroanatomical features of the brain of the seven banded armadillo Dasypus hybridus are described. The microscopic characteristics were studied by serial transverse and sagittal paraffin sections, stained with Nissl and Klüver-Barrera technique. This analysis comprises the telencephalon, diencephalon and mesencephalon. The most outstanding features of this brain are: 1) Great development of rhinencephalic structures (olfactory bulbs, olfactory tubercles, anterior commissure and pyriform cortex). 2) The relative size of the induseum griseum strongly suggests that this animal would be useful for a variety of studies on this structure. 3) The high position of the rhinal fissure on the lateral hemispheric wall determines the smallness of neocortex. Therefore, this armadillo is also useful for decortication studies. 4) Absence of a distinct pineal organ. 5) Conspicuous subfornical and subcommissural organs. 6) Absence of a distinct intermediate lobe in the hypophysis