<b>Estudo morfológico da glândula pineal de Procyon cancrivorus (Cuvier, 1798) (mão-pelada)</b><br>doi: 10.5007/2175-7925.2010v23n2p163

Abstract

ResumoO Procyon cancrivorus é um carnívoro silvestre amplamente distribuído e relativamente comum, mas ainda é pouco estudado, existindo poucos trabalhos relatando sobre a biologia dessa espécie. Este trabalho tem como objetivo, caracterizar morfologicamente a glândula pineal de Procyon cancrivorus, através de estudos macro, microscópicos, radiográficos e compará-los com outros animais já estudados. Foram utilizados quatro animais adultos de ambos os sexos, provenientes do Criatório Científico CECRIMPAS, IBAMA (Processo nº 02027.003731/04-76). Macroscopicamente, a glândula pineal de Procyon cancrivorus foi localizada entre os lobos occipitais dos hemisférios cerebrais e cranialmente ao vermis cerebelar, posicionava-se rostralmente aos colículos rostrais e caudal à comissura das habênulas. Microscopicamente, a glândula é revestida externamente por uma cápsula derivado da meninge pia-máter. Foi notada a presença de três tipos de células no parênquima glandular: pinealócitos, células gliais e mastócitos. Não foram encontradas concreções calcáreas na glândula pineal nos estudos radiográficos e microscópicos. Unitermos: glândula pineal, morfologia, Procyon cancrivorus, radiografia AbstractMorphological study of the pineal gland of (crab eater raccoon) Procyon cancrivorus (Cuvier, 1798). The Procyon cancrivorus is a wild carnivore that is widely distributed and relatively common, but it remains little studied, and few works report on the biology of this species. The aim of this work was to characterize morphologically the pineal gland of Procyon cancrivorus through macro, microscopic and radiographic studies, and to compare them with those from other animals. In this work, four adult animals of both sexes were used, originating from the Scientific Herd of CECRIMPAS IBAMA (Process nº 02027.003731/04-76). Macroscopically, the pineal gland of Procyon cancrivorus was located between the occipital lobes of the cerebral hemispheres, cranially to the vermis cerebelar. It was positioned rostrally to the rostral colliculus and caudally to the habenular comissure. Microscopically, the gland was covered externally by a capsule deriving from the meningeal pia mater.

Morfología de la Glándula Pineal: Revisión de la Literatura

“…Según el rango de edad estas se pueden presentar en dos variedades morfológicas; globular ubicadas en torno a los pinealocitos en personas jóvenes y laminar alrededor de los astrocitos presente en personas más adultas (Koshy & Vettivel, 2001a). Maslinska et al (2010) describen que los mastocitos juegan un importante rol en los sitios donde se inicia el proceso de calcificación a nivel de la glándula pineal, encontrándose estas células asociadas al acérvulo, células encontradas en glándulas pineales de otras especies de mamíferos aunque no asociadas a calcificaciones (Marques et al, 2010).…”

The morphology of the pineal gland of the yellow‐toothed cavy (Galea Spixii Wagler, 1831) and red‐rumped agouti (Dasyprocta leporina linnaeus, 1758)

“…It lies on the ceiling of the III ventricle, on the rostral colliculi and between the brain and the cerebellum. Consequently, the different‐sized and highly developed pineal gland in the cavy and the agouti is based on the ceiling of the third ventricle, or rather, a similar topography described in other species such as the opossum (Mançanares et al, ), dog (Gomes et al, ), coati (Favaron et al, ), buffaloes (Carvalho et al, ), and raccoon (Marques et al, ).…”

“…Favaron et al (), the coati's found that when this structure related to the third ventricle, was classified type AB. Marques et al, (), crab‐eating raccoon, the pineal gland was classified as type A.…”

“…Gomes et al () reported that the color of the pineal gland in the dog ranged between light beige and gray‐chestnut. Carvalho et al (), who studied the pineal gland of the buffalo, described it as light beige with hyperpigmented areas, whereas Marques et al () registered the pineal gland of the raccoon as rosy, greatly differing from results on the agouti and cavy.…”

“…According to Carvalho‐Barros (), the pineal gland in primates of the species Cebus apella has a pine‐like form, very different from the shape of the gland in the agouti or cavy. In the case of the raccoon, Marques et al () report that the pineal gland had an ovoid shape, divided into apex, body, and base regions.…”