Alexandra Morgan

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Improvement in motor skill performance is known to continue for at least 24 hr following training, yet the relative contributions of time spent awake and asleep are unknown. Here we provide evidence that a night of sleep results in a 20% increase in motor speed without loss of accuracy, while an equivalent period of time during wake provides no significant(More)
Growing evidence suggests that sleep plays an important role in the process of procedural learning. Most recently, sleep has been implicated in the continued development of motor-skill learning following initial acquisition. However, the temporal evolution of motor learning before and after sleep, the effects of different training regimens, and the(More)
In cocaine dependent individuals, changes in subjective and objective sleep quality accompany their characteristic binge–abstinence cycle. Preliminary studies suggest that sleep quality may decline with prolonged abstinence. Reported here are results of the most extensive study to date on sleep abnormalities during cocaine binge and confirmed abstinence(More)
A question of great interest in current sleep research is whether and how sleep might facilitate complex cognitive skills such as decision-making. The Iowa Gambling Task (IGT) was used to investigate effects of sleep on affect-guided decision-making. After a brief standardized preview of the IGT that was insufficient to learn its underlying rule,(More)
Young adult male students participated in a naturalistic, group-design experiment to ascertain the effects of one night's total sleep deprivation (TSD) on performance of diverse executive function tasks presented as an extended, multitask battery. On the majority of component tasks in this battery, performance has been reported to be impaired following one(More)
While numerous studies have shown that a night of sleep profits memory relative to wake, we still have little understanding about what factors mediate this effect of sleep. A clear understanding of the dynamics of this effect of sleep beyond the initial night of sleep is also lacking. Here, we examined the effect of extrinsic rewards on sleep-dependent(More)
A method to determine effective renal plasma flow that requires only a single injection of 131-iodine hippuran and eliminates the necessity of obtaining blood samples is described. Good correlation was obtained between this procedure and a method requiring a blood sample. The technique should prove useful in determining effective renal plasma flow when(More)
Baseball pitcher elbow injuries have been increasing in frequency and severity. The ulnar collateral ligament (UCL) prevents valgus (lateral) stress on the elbow, but the forces generated by throwing are great enough to tear the UCL on each pitch. While research has shown that high quality pitching mechanics incorporate stabilizing muscles and help reduce(More)
As families become more dispersed within countries and around the world, the ability to maintain frequent and personalized communication becomes more challenging. Home2Home is a lightweight, smartboard device with ambient display that supports family communication practices with particular attention to the novice technology user. By leveraging the ease of a(More)
Study Objectives Sleep during the biological night facilitates memory consolidation. Here we determined the impact of sleep and wake on motor skill learning (acquisition) and subsequent off-line skill improvement (memory consolidation), independent of circadian phase, and compared this to the impact of the endogenous circadian system, independent of whether(More)
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