Keywords: fMRI Analysis, fMRI (resting state)
Motivation: The autocorrelation (AC) of fMRI signals varies along the hippocampus (HPC), with higher values in the anterior-medial (AM) compared to the posterior-lateral (PL) regions. However, it remains unclear if this pattern is stable over time.
Goal(s): We introduced dynamic autocorrelation (dAC) to investigate temporal changes in the AC pattern. We aimed to determine if the AC along the HPC changes over time.
Approach: Voxel-wise dAC was estimated within the HPC for each subject, and the values were averaged across the PL and AM regions.
Results: The dAC pattern along the HPC is not stable and fluctuates over time.
Impact: We introduced dynamic autocorrelation (dAC) as a measure to investigate dynamic changes in AC patterns and demonstrated that the AC pattern is dynamic during resting-state. The dAC provides a promising approach to examine how neural timescales adapt to environmental changes.
How to access this content:
For one year after publication, abstracts and videos are only open to registrants of this annual meeting. Registrants should use their existing login information. Non-registrant access can be purchased via the ISMRM E-Library.
After one year, current ISMRM & ISMRT members get free access to both the abstracts and videos. Non-members and non-registrants must purchase access via the ISMRM E-Library.
After two years, the meeting proceedings (abstracts) are opened to the public and require no login information. Videos remain behind password for access by members, registrants and E-Library customers.
Keywords