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Hurd/St. Andrews Library
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Tooled for the Task: Vision of the Opossum. (cover story)
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- Author(s): Volchan, Eliane; Vargas, Claudia Domingues; Guedes Da Franca, Joao; Pereira Jr., Antonio; Da Rocha-Miranda, Carlos Eduardo
- Source:
BioScience. Mar2004, Vol. 54 Issue 3, p189-194. 6p. 4 Diagrams. - Source:
- Additional Information
- Subject Terms:
- Abstract: Comparative analysis of the functional and morphological characteristics of the central nervous system of extant vertebrates can shed light on the evolutionary forces that have shaped different vertebrate brains, which, although sharing similar elements and a basic plan, have had to cope with extremely diverse environments. We chose the Dideiphis opossum as an experimental model because of its putative resemblance to cretaceous mammals. This marsupial can be quite accurate in performing activities that rely on visual skills. The existence of an oculo motor system that stabilizes the image on the opossum's retina is of primary importance, compensating for movements of the head and providing this species with a framework to stabilize the retinal image while foraging for food. We review evidence for how the nucleus of the optic tract, a key structure involved in this function, is organized to provide an appropriate blending of-form and function to bring about this basic behavior. [ABSTRACT FROM AUTHOR]
- Abstract: Copyright of BioScience is the property of Oxford University Press / USA and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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