DISCRIMINATION OF AUDITORY SEQUENCES BY MONKEYS

WE have been successful in an attempt to train rhesus monkeys to discriminate among the four permutations of a two element auditory sequence in which each of the elements can be either a burst of tone or a burst of noise. This is an unusually complex task and as such should prove sensitive to manipulations of the central nervous system. Indeed, in experiments now under way, severe deficits have been found in the discrimination performance of monkeys following unilateral ablations of the cortex of the superior temporal gyrus (auditory association" cortex). © 1969 Nature Publishing Group."