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Table 1

Contrasts of Right versus Left Go Trials

Anatomical Location
Cluster Size
Z Value
x y z (mm)
Go Right Minus Left 
L Ventral occipital 189 4.29 −4 −82 −4 
L Dorsal occipitala 443 4.46 −24 −84 22 
L Middle temporal 18 3.35 −44 −74 −10 
 
Go Left Minus Right 
R Ventral occipital 249 4.34 12 −82 −8 
L Dorsal occipitala 150 4.07 −22 −104 6 
L Dorsal occipitala 54 3.85 −8 −92 18 
Anatomical Location
Cluster Size
Z Value
x y z (mm)
Go Right Minus Left 
L Ventral occipital 189 4.29 −4 −82 −4 
L Dorsal occipitala 443 4.46 −24 −84 22 
L Middle temporal 18 3.35 −44 −74 −10 
 
Go Left Minus Right 
R Ventral occipital 249 4.34 12 −82 −8 
L Dorsal occipitala 150 4.07 −22 −104 6 
L Dorsal occipitala 54 3.85 −8 −92 18 
a

The left dorsal occipital activations most likely reflect the presence of the visible light associated with the light-source for the near-infrared eye-tracker (ASL 504a, Applied Science Laboratories), which always appeared in the bottom-right visual field and therefore shifted position along the retina in different directions for upper-left and upper-right executed saccades (while always remaining in the bottom-right quadrant, due to its eccentricity of approximately 14°). Note that such retinal changes due to saccades did not arise on no-go trials, which provide a further critical test of our hypotheses (see main text).

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