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Changes in regional cerebral blood flow (rCBF) in eleven elderly subjects during pairings of tone and air puff were compared to rCBF changes during pairings in young subjects. Although all subjects reported being aware of the relationship between tone and air puff, elderly subjects did not condition as well as young subjects and their rCBF measures were attenuated. Covarying the performance differences...
The purpose of this study was to assess changes in cerebral activity in middle-aged adults (MA: 50 years) compared to young adults (YA: 20 years). Subjects had to compare the duration or the intensity of a visual stimulus with a previously memorized standard. Evoked potentials were recorded, and a dipole model (obtained from PET data on young adults) was applied for fitting late-latency components...
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