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Visual abnormalities in albino wallabies: A brief note

Citation

Guillery, RW and Jeffery, G and Saunders, NR, Visual abnormalities in albino wallabies: A brief note, The Journal of Comparative Neurology, 403, (1) pp. 33-38. ISSN 0021-9967 (1999) [Refereed Article]

DOI: doi:10.1002/(SICI)1096-9861(19990105)403:1<33::AID-CNE3>3.3.CO;2-N

Abstract

Abnormally reduced uncrossed retinofugal pathways and abnormally low retinal cell densities have been described in albinos of a number of species of eutherian mammal, but have not been studied in marsupials. The optic chiasm of marsupials differs from that of the eutherian brains that have been studied, with uncrossed fibres segregating from crossed fibres prechiasmatically in the marsupials, but not in the eutherians. We have examined the optic chiasm and the retina in albino and normally pigmented wallabies (Macropus rufogriseus) to determine whether the abnormalities found in eutherian albinos are also present in this marsupial. The uncrossed pathway of the albino wallaby is smaller than that of the pigmented animals and the cell density in the retinal ganglion cell layer is reduced at the area centralis. We conclude that the characteristic albino abnormalities are present in both groups of mammals in spite of the other known differences in the visual pathways. The albino mutation acts at the chiasm in a similar manner in both groups even though the determinants of the chiasmatic pathway differ.

Item Details

Item Type:Refereed Article
Research Division:Medical and Health Sciences
Research Group:Neurosciences
Research Field:Central Nervous System
Objective Division:Health
Objective Group:Clinical Health (Organs, Diseases and Abnormal Conditions)
Objective Field:Nervous System and Disorders
Author:Saunders, NR (Professor Norman Saunders)
ID Code:17429
Year Published:1999
Web of Science® Times Cited:7
Deposited By:Anatomy and Physiology
Deposited On:1999-08-01
Last Modified:2011-08-05
Downloads:0

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