The first aMRI [activity MRI] maps of the awake, heathy human brain are
presented. They show differences in cell
density [ρ (cells/μL)], average cell volume [V (pL)], and on-going
metabolic activity among different brain tissues. Metabolic activity is represented by the mean
steady-state cellular water efflux rate constant [kio], which
reflects homeostatic cytolemmal Na+,K+-ATPase
[NKA] enzymatic turnover. Cortical gray
matter [GM] ρ is
less than white matter [WM] ρ,
while VGM > VWM.
Most interesting is the quite large WM kio, 30 s-1. WM NKA activity per cell is considerably larger than in cortical GM.
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