"In lateral research on cognitive processing, it has been shown that stress can alter or even reverse functional hemisphere asymmetries, for instance, the typical advantages of the left hemisphere for verbal material and the right hemisphere for visuo-spatial material in visual half field or dichotic listening tests."

Reference: Brain Asymmetry and Stress: New Perspectives in psychophysiologically oriented psychosomatic research.

www.uni-graz.at/~papousek/psybeit.pdf