The purpose of this study is to test the retention of sensory experience in the modality of light-touch with both young and elderly subjects.  Based on previous literature, it is expected that young Ss will be able to maintain more accurately the light-touch impression for a long delay period (two weeks) than older persons. The test for retention or the impression will be made immediately (two minutes) following the stimulation for one-half the Ss, and after two week a for the remaining Ss