4331): 852-856, 1978. Geschwind N and Levitsky W. Human brain: Left-right asymmetries in temporal speech region. Science, 161(837): 186-187,1968. Gold JM, Berman KF, Randolph C, Goldberg TE, and Weinberger DR. PET validation of a novel prefrontal task Delayed response alteration. Neuropsychology, 10(