Circumventricular organs of rats that experimental hydrocephalus and subarachnoidal hemorrhage carried out: An anaglyphic SEM study

It is known that circumventricular organs that are located around the ventricular system of the brain are lack of blood-brain barrier and support the body water-salt balance. They also effect many physiological events such as some neuroendocrine and reproduction mechanisms. In different pathological conditions their results and the step in which the circumventricular organs are affected are unknown. Although circumventricular organs do not have a blood-brain barrier, they do not completely show the same characteristics. In pathological conditions they show their own effects by means of mediators. It is necessary to research their structural changes, also the changes in the neurotransmitters that are affected by circumventricular organs. Hydrocephalus was induced in rats by injecting kaolin into the subarachnoidal space at the cranial convexity. Subarachnoidal hemorrhage was realized with a puncture of the basilar artery through transclival route. We took and studied images using a JEOL SEM ASID-10 (Japan) electron microscope. We examined slices of subfornical organ, organum vasculosum, lamina terminalis, area postrema and median eminence. The purpose of this study is to view three-dimensional scanning electron microscopic images of the circumventricular organs using the anaglyph technique that records images as stereopairs (converted as a red-blue images and viewed with special glasses). © neuroanatomy.org