Erica J. Harris

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Cortical width from radiographs has been used for more than 40 yr as a means of estimating bone strength. In the last 5-10 yr, increased availability of computers and the development of automated algorithms for image assessment have led to an increased interest in radiogrammetry. In this study, we examined a new radiogrammetry device, the Pronosco X-posure(More)
INTRODUCTION A number of reports have identified significant personality differences in patients with Parkinson's disease (PD) when compared with age-matched controls. We hypothesised that these differences may be related to impairment in prefrontal inhibitory functions resulting in the expression of new "Machiavellian" personality traits. METHODS(More)
We have constructed a database that describes the sleeping characteristics of 127 different mammalian species representing 46 families across 17 orders. The data were extracted from 178 separate references that were found using standardized search protocols, and for each study includes information on the time spent in REM and NREM sleep, sleep cycle length,(More)
To determine the accuracy of double-contrast arthrography in complete rotator cuff tears, we studied 805 patients thought to have a complete rotator cuff tear who had undergone double-contrast shoulder arthrography (DCSA) between 1978 and 1983. The results of this study indicate that DCSA is exquisitely sensitive and as accurate as the single-contrast(More)
PURPOSE We hypothesized that alterations of subcomponents ('harm-avoidance') of personality and the sense of Self in patients with PD would be associated with executive cognitive dysfunction. METHODS Thirty-four patients with PD and 17 age-matched controls with chronic disease were assessed with a set of neuropsychologic, personality and mood tests as(More)
Basal sleepiness-alertness modulates drug effects. Sleepiness produced by sleep restriction leads to increased nociceptive sensitivity, suggesting opioid analgesia may also be modulated by sleepiness-alertness. This study compared thermal nociceptive sensitivity in sleepy versus nonsleepy participants after codeine or placebo. Twelve healthy normal adults,(More)
STUDY OBJECTIVES To determine whether an extended bedtime in sleepy and otherwise healthy volunteers would increase alertness and thereby also reduce pain sensitivity. SETTING Outpatient with sleep laboratory assessments. PARTICIPANTS AND INTERVENTIONS Healthy volunteers (n = 18), defined as having an average daily sleep latency on the Multiple Sleep(More)
STUDY OBJECTIVES To assess the stability of the multiple sleep latency test (MSLT) in primary insomnia and its relation to total sleep time. DESIGN Randomized, double-blind, placebo controlled, clinical trial. SETTING Outpatient with sleep laboratory assessments in months 1 and 8 of treatment. PARTICIPANTS Ninety-five primary insomniacs, 32-64 years(More)
Rebound insomnia, worsened sleep when discontinuing use of a hypnotic, is reported in some short-term studies. No study has prospectively assessed, using patient reports or nocturnal polysomnography (NPSG), the likelihood of rebound insomnia with chronic hypnotic use. The objectives of this study was to assess in primary insomniacs the likelihood of(More)
BACKGROUND Decreased ability to absorb calcium with age limits adaptation to low calcium intake and is thought to lead to secondary hyperparathyroidism and increased risk for hip and other fractures. However, the associations between fractional calcium absorption, dietary calcium intake, and risk for fracture have never been studied. OBJECTIVE To(More)