Double dissociations between neglect tests: Possible relation to lesion site

In 20 patients who had suffered a first right hemisphere stroke, we examine d the prevalence of double dissociations between the results of a star canc ellation and a line bisection test. Both are common methods to assess spati al hemineglect. Within the group of neglect patients, we found no significa nt correlation between the two tasks. Furthermore, 5 patients with impaired performance on one of the tests were within the normal range on the other one. in agreement with experimental studies, we argue that spatial heminegl ect is not a unitary syndrome. Furthermore, the findings in one of our pati ents are compatible with the view that an isolated deficit on cancellation tasks might follow from a lesion in the right anterior cingulate gyrus. Cop yright (C) 2001 S. Karger AG, Basel.