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The architecture of the avian retina following exposure to chronic 2 GRhode Island Red female chicks at 2 weeks posthatch were subjected, for 7 d, to either earth gravity of 1 G or a 2-G hypergravity environment by chronic whole-body centrifugation. Animals were sacrificed at 3 weeks posthatch and the eyes were enucleated, fixed in 10% BNF, doubly embedded, sectioned at 7-8 microns and routinely processed with H & E for histological examination. Compared to normogravity controls, animal exposure for 1 week to the chronic effects of 2-G resulted in a significantly decreased mean width of the photoreceptor, inner nuclear, and inner plexiform retinal layers. The outer nuclear, outer plexiform, and ganglion cell layers of the retina appeared minimally affected by the hypergravity state since the mean width of these layers showed no noticeable differences from earth gravity control animals. The present anatomic findings suggest a reduction in the detection of motion or rapid changes in illumination by the avian retina when the animal is exposed at a 2-G environment.
Document ID
19800057843
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Orlando, R. G.
(Ohio State Univ. Columbus, OH, United States)
Negulesco, J. A.
(Ohio State University Columbus, Ohio, United States)
Date Acquired
August 10, 2013
Publication Date
July 1, 1980
Subject Category
Life Sciences (General)
Accession Number
80A42013
Funding Number(s)
CONTRACT_GRANT: NAS2-6634
Distribution Limits
Public
Copyright
Other

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