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The accuracy of q-space measurements was evaluated at a 3.0-T clinical magnetic resonance imaging (MRI) scanner, as compared with a 4.7-T nuclear magnetic resonance (NMR) spectrometer. Measurements were performed using a stimulated-echo pulse-sequence on n-decane as well as on polyethylene glycol (PEG) mixed with different concentrations of water, in order(More)
Studies of the event-related potentials (ERPs) P3a/P3b have given insights into age effects on cognitive processes in the brain, and it has been established that latency increases and amplitude decreases with age. However, if latency jitter, that is, variation in single trial latencies, is larger in elderly than in younger participants, this may create an(More)
Instability in performance is a prominent feature of aging. In this study, 133 participants evenly distributed across the adult lifespan underwent a three-stimulus event-related potentials (ERPs) paradigm, and instability in P3a/P3b latency and reaction time (RT) were measured. P3a is related to alertness or reorientation of attention and it was elicited by(More)
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