Out of tune: Mismatch of vascular, neural responses suggests limits of fMRI
Wednesday, May 25, 2016 - 13:51
in Biology & Nature
During sensory stimulation, increases in blood flow are not precisely 'tuned' to local neural activity, report investigators. This finding challenges the long-held view that vascular and local neural responses are tightly coupled and could suggest limitations for functional magnetic resonance imaging, which assumes that vascular changes reflect a proportional change in local neural activity.