for GB .. 

Data from subject R3109

files included:

anat.nii.gz - a proton density weigthed 'inplane' anatomy at the same resolution as the functional data 

binary volumes in functional space describing the extent of the following visual areas (one file for each):
lV1.nii.gz
lV2d.nii.gz
lV2v.nii.gz
NOT - lV3a.nii.gz
lV3d.nii.gz
lV3v.nii.gz
rV1.nii.gz
rV2d.nii.gz
rV2v.nii.gz
NOT - rV3a.nii.gz
rV3d.nii.gz
rV3v.nii.gz

phase (0-2 pi), coherence (0-1) and amplitude data for the fits to the retinotopy model
ringAmpDat.nii.gz
ringCohDat.nii.gz
ringPhsDat.nii.gz
wedgeAmpDat.nii.gz
wedgeCohDat.nii.gz
wedgePhsDat.nii.gz

retinotopy parameters were:
checkerboard 100% contrast reversing at 6HZ; stimulus extent is the central 15 degrees of the visual field.

Rings: whole stimulus comprises 8 concentric rings each subtending 1.875deg ; 3 annuli are visible at any given time; over 8 steps of 4.5 sec each, the ring expands from the central 3 rings outwards; stimulus cycle 36s; 7 repretitions per scan
Wedges: 24 wedge sectors (radial frequency 12Hz), 6 of whihc (90 deg sector of stimulus) visible at any one time; over 24 steps of 1.5 sec each the stimulus progresses for the upper-left visual quadrant in a counter clockwise direction; stimulus cycle 36s; 7 repretitions per scan


'Helmholtz' stimuli:
A 'stack' of horizontal lines was presented to one visual field while vertical lines were presented to the other visual field. Stimuli were equidistant from fixation. Four different stimulus conditions; 'standard' square stimulus size was 6.6 x 6.6 deg

PhysHLeft - Physically identical, horizontal left: the bounds of the two stimuli are identical, covering the same physical amount of visual space; this should give the percept of a taller (horizontal) stimulus in the left visual field.

PhysHRight- Physically identical, horizontal right: the bounds of the two stimuli are identical, covering the same physical amount of visual space; this should give the percept of a taller (horizontal) stimulus in the right visual field.

PerHLeft - Horizontal in left visual field, but now the width of the horizontal stimulus is adjusted to the PSE of the individual subject; vertical stimulus in right visual field unchanged.

PerHRight - Horizontal in right visual field, but now the width of the horizontal stimulus is adjusted to the PSE of the individual subject; vertical stimulus in left visual field unchanged.

GLM outputs:

betas1.nii.gz - PhysHLeft
betas2.nii.gz - PhysHRight
betas3.nii.gz - PerHLeft
betas4.nii.gz - PerHRight
betas5.nii.gz - Baseline (mean luminance background)



