To estimate the reliability of task-fMRI, we conducted a repeated measure fMRI study of psychomotor vigilance task once per day and 30 days in total. Salivary cortisol and sleep duration were taken into consideration based on previous study. However, we found dramatic within-subject variability in the brain activity of dACC and primary motor cortex. The cortisol showed insignificant association with brain activity, but sleep duration affected the motor and temporal cortices. Such finding suggests that the PVT-based fMRI showed large variability across different days, which might be associated with the deviations of sleep duration.
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