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. Author manuscript; available in PMC: 2010 Dec 14.

Published in final edited form as: J Neurol Sci. 2009 Sep 19;287(1-2):159–171. doi: 10.1016/j.jns.2009.08.003

Figure 5A: Scatterplot with regression line demonstrating the relation between the angle from the midpoint of the AC-PC line to the electrode tip in relation to the midsagittal plane in the left hemisphere and Dementia Rating Scale difference scores. The lower the angle reflects a more posterior-lateral direction in the frontal quadrant and a lower difference score reflects a greater decline in mental status performance following surgery (p=0.007).

Figure 5B: Scatterplot with regression line demonstrating the relation between the angle from the midpoint of the AC-PC line to the electrode tip in relation to the axial plane in the left hemisphere and verbal short-term memory difference scores. The lower the angle reflects a more superior direction and a lower difference score reflects a greater decline in verbal short-term memory performance following surgery (p=0.005).

Figure 5C: Scatterplot with regression line demonstrating the relation between the angle from the midpoint of the AC-PC line to the active electrode in relation to the axial plane in the left hemisphere and Dementia Rating Scale difference scores. The lower the angle reflects a more superior direction and a lower difference score reflects a greater decline in mental status performance following surgery (p=0.001).

Figure 5D: Scatterplot with regression line demonstrating the relation between the angle from the midpoint of the AC-PC line to the active electrode in relation to the axial plane in the left hemisphere and verbal learning difference scores. The lower the angle reflects a more superior direction and a lower difference score reflects a greater decline in verbal learning (p=0.05).

Figure 5A: Scatterplot with regression line demonstrating the relation between the angle from the midpoint of the AC-PC line to the electrode tip in relation to the midsagittal plane in the left hemisphere and Dementia Rating Scale difference scores. The lower the angle reflects a more posterior-lateral direction in the frontal quadrant and a lower difference score reflects a greater decline in mental status performance following surgery (p=0.007).

Figure 5B: Scatterplot with regression line demonstrating the relation between the angle from the midpoint of the AC-PC line to the electrode tip in relation to the axial plane in the left hemisphere and verbal short-term memory difference scores. The lower the angle reflects a more superior direction and a lower difference score reflects a greater decline in verbal short-term memory performance following surgery (p=0.005).

Figure 5C: Scatterplot with regression line demonstrating the relation between the angle from the midpoint of the AC-PC line to the active electrode in relation to the axial plane in the left hemisphere and Dementia Rating Scale difference scores. The lower the angle reflects a more superior direction and a lower difference score reflects a greater decline in mental status performance following surgery (p=0.001).

Figure 5D: Scatterplot with regression line demonstrating the relation between the angle from the midpoint of the AC-PC line to the active electrode in relation to the axial plane in the left hemisphere and verbal learning difference scores. The lower the angle reflects a more superior direction and a lower difference score reflects a greater decline in verbal learning (p=0.05).