ABSTRACT
The purpose of the p resen t investigation was to m easure olfactory sensitivity by determ ining the thresholds for odor identification be fore and after the various brain operations described in the preceding chapters. With the possible exception of those cases undergoing tran s orbital lobotomy it was not expected that im pairm ent in acuity would occur. In th is operation the cutting instrum ent might damage the a rea shown by previous re search to be c ritic a l for olfaction, viz., the olfac tory bulbs, to such an extent as to leave the patient anosmic or with m ark edly reduced sensitivity. It is doubtful whether damage to other parts of the com plicated olfactory pathway would have any m easurable ef fect on thresholds.
