RESUMO
INTRODUCTION: Classically, the morphologic study of the internal capsule (IC) is made by two cuts: the coronal of Charcot and the axial of Fleschig. Recent neuroradiologic studies and clinical investigations contribute to the observation in the non-invasive form of this region. OBJECTIVE: The present work tries to complement the study of this important anatomical region, demonstrating it in integral and three-dimensional form. For that reason, the channeled soundings and instruments of manicurist and odontology were modified, and were conformed to a Seth of dissectors designed specifically to approach the IC. Each dissector presents particular characteristics, which allows the delicate dissections of the different anatomical structures to be made. MATERIALS AND METHODS: Twenty encephala of adult corpses were used for this investigation, fixed with a solution of formol to 10% in distilled water. They were approached at the external face of the cerebral hemisphere at level of the lateral fissure. The middle cerebral artery and the insula lobe were dissected and extirpated using the dissector no. 1, exposing the extreme capsule. The dissector no. 2 was used to dissect the fibers and the extreme capsule was extracted jointly with the claustrum, demonstrating the external capsule. The fibers were dissected using the dissector no. 3, thus exposing the lentiform nucleus. Then, the external face of the nucleus was delimited with the dissector no. 4 and then underwent exeresis, to allow for the entry of the genu of the IC. The genu constituted nervous fibers, laid out vertically and perpendicular to the greater axis the nucleus before mentioned. The fibers were dissected with the dissector no. 5, also appreciating the route of the lenticuloestriadas arteries that irrigate the region in the study. Using the dissector no. 6, nervous fibers of the corona radiata were dissected, as well as the short arciformes fibers and the endings in the cerebral cortex. Lastly, the dissector no. 7 was used to dissect the fibers of the pyramidal route and their route by the cerebral trunk, from above to below. CONCLUSION: With the use of the presented instruments, a selective boarding of the IC was obtained, and thanks to the specific characteristics of each dissector, the different anatomical structures related to the IC can be approached with facility. Also, the nervous fibers that compose it can be dissected, which expose the IC in an integral and three-dimensional way.
Assuntos
Dissecação , Cápsula Interna/anatomia & histologia , Adulto , Dissecação/instrumentação , Dissecação/métodos , Humanos , Cápsula Interna/cirurgia , Fibras Nervosas , Vias Neurais/anatomia & histologiaRESUMO
Museums where anatomical pieces are exhibited are disappearing. The advance of the computer together with the advance of conventional and three-dimensional radiology makes the organs to be exposed without practicing dissection and the virtual images replace the real ones in the educational process. Some current laws that restrict the use of corpses and fetuses for obituary and exhibition studies have also contributed to the tendency. The anatomical museum, today named Pedro Ara, was founded in December 1920 and it exhibits anatomic works from the embryonic stage to old age, contributing unbeatable teachings to the medical sciences and the general public. The museum is located in the Angel Roque Suarez Anatomic Institute in the Clinical National Hospital which depends on the National University of Cordoba. It is visited daily by hundreds of people from all over the world. The museum owns 1211 pieces that combine ethical, scientific, aesthetical and educational values achieving a realization that received international acknowledgement. The most valuable exhibited work is 'Old man's head' made by Professor Pedro Ara in 1928-1929 (Figure 1), which, owing to its high quality, is in an impeccable and unharmed condition despite being exhibited for 80 years. Other authors, such as Professor Humberto Fracassi, also enriched the museum with their work and we, convinced that it favors and will favor our human formation and professional training, have the privilege of being their heirs and the responsibility of being their followers.