Do the brains of non-human animals shrink with age (especially long-lived ones)?

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Recent research highlights that human brains experience significant shrinkage with age, a phenomenon not observed to the same extent in chimpanzees, our closest living relatives. This unique brain shrinkage in humans may contribute to various health issues and mental illnesses as individuals age. Neurologist Bruce Yankner suggests that exploring brain aging in other long-lived species, such as tortoises, elephants, and parrots, could provide further insights into the relationship between longevity and brain health. The findings underscore the distinct aging processes of the cerebral cortex in humans compared to chimpanzees, as detailed in a study published in the Proceedings of the National Academy of Sciences.
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See http://news.sciencemag.org/sciencenow/2011/07/the-incredible-shrinking-human-b.html?rss=1

Bruce Yankner, a neurologist at Harvard Medical School in Boston, agrees. To test the authors' hypothesis that human brain shrinkage is a result of greater longevity, Yankner says, "it would be interesting" to see if similar brain shrinkage occurs in other species with extreme longevity, "such as tortoises and turtles that live for well over 100 years, elephants that can live for 70 years, and parrots that can live for 80 years."
 
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Biology news on Phys.org
http://www.sciencedaily.com/releases/2011/07/110727171510.htm

Brains shrink in humans, potentially causing a number of health problems and mental illnesses as people age, but do they shrink to the same extent in the closest living relatives to humans--the chimpanzees?

New research says no, making the extreme amount of brain shrinkage resulting from normal aging in humans unique.

C. C. Sherwood, A. D. Gordon, J. S. Allen, K. A. Phillips, J. M. Erwin, P. R. Hof, W. D. Hopkins. Aging of the cerebral cortex differs between humans and chimpanzees. Proceedings of the National Academy of Sciences, 2011; DOI: 10.1073/pnas.1016709108
 
yeah, though that article is the same as the one I posted...
 

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