Spikes versus BOLD: what does neuroimaging tell us about neuronal activity?
David J. Heeger1, Alex C. Huk1, Wilson S. Geisler2
& Duane G. Albrecht2
1
David Heeger and Alex Huk are at the Department of
Psychology, Stanford University, Stanford, California
94305, USA. heeger@stanford.edu
2
Wilson Geisler and Duane Albrecht are at the Department
of Psychology, University of Texas, Austin, Texas
78712, USA.
By demonstrating that fMRI responses in human MT+ increase linearly
with motion coherence and comparing these responses with slopes of single-neuron
firing rates in monkey MT, a new paper provides the best evidence so far that
fMRI responses are proportional to firing rates.
