Excerpt from Annual Report, Division of Intramural Research Programs, Vol. 2: October 1, 1987 September 30, 1988, Part II, Individual Project ReportsInvestigations of recognition memory in monkeys have largely been confined to vision. The one exception was an experiment from this laboratory showing that temporal lobe limbic structures are just as important for tactile as for visual recognition. Experiments in another project (nh 02037) have demonstrated that a cortical tactile processing pathway runs from the postcentral somatosensory cortex to the second somatosensory area, 811, from $11 to the insular cortex, and, finally, from the insular cortex to the medial temporal region. These results suggest that the insular cortex could play a role in tactile recognition analogous to that played by the inferior temporal cortex (area te) in visual recognition. To test this idea, we are comparing the effects of inferior temporal and insular lesions on both visual and tactile recognition. Our preliminary results indicate that monkeys with bilateral ablations of this cortex are severely impaired in tactile but not visual recognition of objects. Thus, the results suggest that the somatosensory system, like the visual system, interacts with the limbic system through a series of modality-specific areas. Besides pursuing the tactile recognition studies, we are continuing to explore behavioral methods for evaluating recognition memory in audition so that we can extend our behavioral investigations to this modality.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.