Fig. 1.

MRI brain scans of Patient SA. (A) Sagittal image demonstrating loss of volume of the left medial frontal and parietal cortex with a pathologically widened cingulate sulcus. (B) Coronal images showing loss of cortical volume particularly of the superior parietal lobe adjacent to a widened intraparietal sulcus, most prominently on the left, together with reduction in caudate head volume bilaterally. (C) Axial images demonstrating widened sulci over superior parietal and frontal regions, including the left central sulcus. White arrowhead = cingulate sulcus; yellow arrowhead = left intraparietal sulcus; red arrowhead = left central sulcus; green arrowhead = caudate head.