This subproject is one of many research subprojects utilizing theresources provided by a Center grant funded by NIH/NCRR. The subproject andinvestigator (PI) may have received primary funding from another NIH source,and thus could be represented in other CRISP entries. The institution listed isfor the Center, which is not necessarily the institution for the investigator.Humans are unique among primates in their vulnerability to age-related neurodegenerative disease, especially Alzheimer's disease, which is known to occur naturally only among humans. This project explores similarities and differences in age-related changes in brain structure in humans, in chimpanzees (the animals most closely related to humans), and in macaque monkeys (primates that are often used as models for humans in neuroscientific research). We are using neuroimaging techniques to identify age-related changes in gray matter volume, white matter volume, and white matter integrity in young adults, middle-aged adults, and elderly individuals, and are carrying out postmortem microscopic examination of brain-tissue changes of any animals that die during the course of the study.
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