Peter Jan Koopmans1, Eelke Visser1,
David Gordon Norris1,2, Markus Barth1,2
1Radboud University Nijmegen, Donders
Institute for Brain, Cognition and Behaviour, Nijmegen, Netherlands; 2Erwin
L. Hahn Institute for Magnetic Resonance Imaging, Essen, Germany
A
fast, high-resolution fMRI study of human V1 at 3 T is presented showing
layer-specific effects. While contrasting grating stimuli versus rest shows
activation profiles that inside the cortex peak in the granular layer,
differential effects can be seen in the supragranular layer when contrasting
coloured versus achromatic stimuli. Using 3D-EPI, 32 slices with 0.75 mm
isotropic voxels could be measured with a volume repetition time of only 2.5
seconds opening the door to event related stimulus designs at the laminar
level.
Keywords