| Morphological and Morphometric Study of the Pecten Oculi in the Budgerigar (Melopsittacus undulatus). | |
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MedLine Citation:
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PMID: 22266789 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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The pecten oculi is a highly vascular and pigmented organ placed in the vitreous body of the avian eye. As no data are currently available on the morphological organization of the pecten in the Psittaciformes, the pecten oculi of the budgerigar (Melopsittacus undulatus) was studied. The eyes from adult male budgerigars were examined by light, transmission, and scanning electron microscopy and a morphometric study on both light and transmission electron microscopy specimens was also performed in the different parts of the organ. In the budgerigar, the type of the pecten oculi was pleated. Its basal part had a cranio-caudal and postero-anterior course; its body consisted of 10-12-folds joined apically by a densely pigmented bridge. The pecten showed many capillaries, whose wall was thick and formed by pericytes and endothelial cells. These latter had a large number of microfolds, rectilinear on their luminal surface and tortuous on their abluminal surface. Interstitial pigment cells were placed among the capillaries, filled with melanin granules and showed many cytoplasmic processes. The morphometric analysis demonstrated significant differences among the three parts of the organ relative to the length of the endothelial processes and to the number and size of the pigment granules. The morphological and morphometric analysis showed that the bridge of the budgerigar, different from the other birds, had a large number of capillaries, so that this part of the organ could also play a trophic role for the retina in addition to the choriocapillaris. Anat Rec, 2012. © 2012 Wiley Periodicals, Inc. |
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Authors:
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Antonio Micali; Antonina Pisani; Claudia Ventrici; Domenico Puzzolo; Anna Maria Roszkowska; Rosaria Spinella; Pasquale Aragona |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2012-1-20 |
Journal Detail:
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Title: Anatomical record (Hoboken, N.J. : 2007) Volume: - ISSN: 1932-8494 ISO Abbreviation: - Publication Date: 2012 Jan |
Date Detail:
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Created Date: 2012-1-23 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101292775 Medline TA: Anat Rec (Hoboken) Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
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Copyright © 2012 Wiley Periodicals, Inc. |
Affiliation:
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Department of Biomorphology and Biotechnologies, Section of Histology and Embryology, University of Messina, Policlinico Universitario, Via Consolare Valeria 1, I-98125, Messina, Italy. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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