Memory Imaging of Normal Aging

Alzheimer's Disease Clinical Trial

Official title: BOLD and Perfusion fMRI of Alzheimer's Disease Risk

Status Completed

Clinical Trial Summary

The purpose of this study is to develop imaging techniques that can distinguish functional brain changes in people at high risk for dementia years prior to onset of clinical memory problems from those with normal changes of aging.

Clinical Trial Description

The overall goals of this project are to identify consistent patterns of variance in brain function in patients at risk for Alzheimer's Disease by using APOE ε4 as a marker for disease risk. The activation Blood Oxygen Level Dependency (BOLD) signal will be compared to both resting and activation perfusion signals to assess the variability of cerebral blood flow as it relates to the BOLD signal. Each participant will be imaged on a 3T MRI scanner while performing an associate episodic memory task.

A total of 90 individuals will be recruited for this study. Participants will be non-demented, right handed, adults with or without at least one APOE ε4 allele. Groups will be split as follows: A) ages 25-39: non-ε4 (n=15); B) ages 25-39: +ε4 (n=15); C) ages 40-49: non-ε4 (n=15); D) ages 40-49: +ε4 (n=15);.E) ages 50-65: non-ε4: F) ages 50-65: +ε4 (n=15). These groups will be matched for mean age, mean years of education, gender distribution, as well as the presence or absence of a family history of AD in a first degree relative.

There will be 2 scanning sessions for each participant. Scan session #1 and Scan session #2 will be acquired within 2 weeks of each other and will take approximately one hour each. ;

Study Design

Observational Model: Cohort, Time Perspective: Cross-Sectional

Related Conditions & MeSH terms

• Alzheimer Disease
• Alzheimer's Disease

• NCT number: NCT00315575
• Study type: Observational
• Source: National Institute on Aging (NIA)
• Status: Completed
• Phase: N/A
• Start date: August 2005
• Completion date: July 2008