PMC2678860_01
Diagram of critical test conditions, which were a subset of all movement conditions, for determining whether KE exhibited transformation deficits following gaze rotation (a - c), head rotation (d - f), and body rotation (g - i). Each cell presents a top down view of the participant and the location of the analyzed targets (filled small circles) and the excluded targets (open small circles) for each condition. Integrity of transformations between gaze- and head-centered coordinates was tested by maintaining a constant head and body orientation (centered) and examining only those targets (filled small circles) for which gaze was oriented to the left, center, or right (a, b, and c, respectively). Integrity of transformations between head- and shoulder-centered coordinates was tested by rotating the head to the left or right while maintaining a constant body orientation and gaze orientation (d - f). Integrity of the transformations between shoulder- and hand-centered coordinates was tested by rotating the body to the left or right while maintaining a constant head and gaze orientation (g - i). Note that the central condition for all three transformations (b, e, h) are identical.
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F1
In all conditions there were 9 target locations (Figure 1) arrayed in a semicircle with a 30 cm radius (targets at 0 , 22.5 , 45 , 67.5 , 90 , 112.5 , 135 , 157.5 , and 180 ).
Locations of KE's lesions. Numbers below each slice indicate the z-value for that slice.
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F2
An MRI scan (Figure 2) obtained 8 months after the second stroke revealed small areas of infarction in the left middle temporal gyrus, left middle frontal gyrus as well as a larger infarction of the left posterior parietal lobe and residual changes from a right parieto-occipital hemorrhage.