Frontoparietal cortical networks for directing attention and the eye to visual locations: Identical, independent, or overlapping neural systems?

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   Figure 1

   Sagittal PET section, 25 mm left of midline, of group-averaged subtraction image between shifting-attention and central-detection tasks. 

   
   
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   Figure 2

   3D rendering and 2D flattened surface of the Visible Man Brain, with the left hemisphere on the left. Lobes are indicated in 2D surface. Sulci are indicated as follows: sfs, superior frontal sulcus (s.); precs, precentral s.; cs, central s.; pocs, postcentral s.; ips, intraparietal s. Foci of activation during shifting attention [red (16), yellow (17), and orange (53)] and tonic attention [pink (24), violet (25), and light orange (Woldorff et al., unpublished data)]. 

   
   
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   Figure 3

   MPrage anatomical and fMRI activity in single subject during shifting attention in left visual field. Transverse section, z = 52. Coronal sections along precentral (precs), postcentral (pocs), and intraparietal sulcus (ips).

   
   
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   Figure 4

   Visible Man Brain as in Fig. 2. Foci for saccadic eye movements. 

   
   
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   Figure 5

   Visible Man Brain as in Fig. 2. Foci for attention from Fig. 2 (red) and eye movement from Fig. 4 (green). Areas of overlap are in yellow. 

   
   
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   Figure 6

   Anatomical MRI and fMRI activity in single subject for shifting attention and saccadic eye movements in left (LVF) and right (RVF) hemispheres. Slices at z = 52 mm.