Changes in brain structure and function are a normal part of the aging process from middle age through older adulthood. In the last decade, an explosion of work has focused on brain structure in disorders that occur as we age. Yet, relatively few studies have focused on healthy aging of brain circuitry and how it varies across people.
Thanks to recent technological advances pioneered by the Human Connectome Project study of healthy young adults, we can now explore how the brain typically ages and how connections change in mature and older adults. Data collected will be shared broadly so that researchers can learn as much as possible from it for years to come. Characterizing brain aging in healthy adults will also allow us to better understand differences in people with conditions that may affect brain wiring such as dementia or major depression.
Ultimately, the HCP-A Study aims to collect information that we, our families, and health professionals can use to enhance our well being as we age.
The Lifespan Human Connectome Project Aging (HCP-A) Study will enroll 1,500+ healthy adults ages 36-100+ to discover how individual experiences affect the ways in which different parts of the brain are connected and how these connections (the “connectome”) change across healthy adulthood. To learn how to participate, go to our Recruitment Page.
AABC Release 1 includes cross-sectional (V1) and longitudinal (V2, V3) 3T MR scans and non-imaging data from 1248 healthy older adults (ages 36-90+) in the HCP-Aging (HCA) and Aging Adult Brain Connectome (AABC) projects.
It includes multi-modal preprocessed and unprocessed imaging data (structural, high-res hippocampal T2 [unprocessed only], resting state fMRI, task fMRI, diffusion, and ASL) on 1248 participants in 2214 imaging visits (many subjects have data for more than one visit, 36+ TB of data). It includes non-imaging data collected over a broad range of domains for 1248 V1, 762 V2, and 236 V3 (2246 total) in-person visits and in remote follow up surveys (non-imaging events). Session breakdowns by study and visit/event are available here.
What’s new in AABC Release 1?
Get Access and Download the data: Get started by Registering for BALSA and agreeing to the AABC Data Use Terms. An academic, non-profit, or government email address is required for agreement to the AABC Data Use Terms and accessing the data.
To download imaging data, you must 1) install Aspera Connect (scroll down to “IBM Aspera client-deployed software” to find Aspera Connect download links) and 2) an Aspera Connect plugin for your browser (available from Firefox, Chrome, Safari, etc.).
Set Preferences>Transfers in Aspera Connect to a directory with sufficient space for large downloads.
To download the full non-imaging data, click the Files tab and Download under AABC_Release1_Non-imaging_Data-XL.csv. Use the Column Selector and Export CSV to view, filter on, and download all or subsets of Core Variables for selected subjects.
Want more information? Check out our updated documentation to help with understanding the file structure and interpreting the data.
View Data Release Documentation
Release Date: Oct 27, 2025
Lifespan HCP Release 2.0 includes cross-sectional visit 1 (V1) preprocessed structural and functional imaging data, unprocessed V1 imaging data for all included modalities (structural, high-res hippocampal T2, resting state fMRI, task fMRI, diffusion, and ASL), and non-imaging demographic and behavioral assessment data from 725 HCP-Aging (HCP-A, ages 36-100+) healthy participants (22+ TB of data).
What’s new in the Lifespan 2.0 release?
Get Access and Download the data: Get started with the Data Access and Download Instructions for navigating NDA and using it's download tools. We've also created a wiki that details setup for downloading data via NDA's command line tools.
Want more information? Check out our updated documentation to help with understanding the file structure and interpreting the data.
View Data Release Documentation
Release Date: Feb 26, 2021