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OBJECTIVE Focal brain lesions can have important remote effects on the function of distant brain regions. The resulting network dysfunction may contribute significantly to behavioral deficits observed after stroke. This study investigates the behavioral significance of changes in the coherence of spontaneous activity in distributed networks after stroke by(More)
Shifts of attention to unattended stimuli (stimulus-driven reorienting) are often studied by measuring responses to unexpected stimuli, confounding reorienting and expectation. We separately measured the blood-oxygenation-level-dependent signal for both factors by manipulating the probability of salient visual cues that either shifted attention away from or(More)
Spatial selective attention is widely considered to be right hemisphere dominant. Previous functional magnetic resonance imaging studies, however, have reported bilateral blood-oxygenation-level-dependent responses in dorsal frontoparietal regions during anticipatory shifts of attention to a location (Kastner et al., 1999; Corbetta et al., 2000; Hopfinger(More)
OBJECTIVES Obstructive sleep apnea syndrome in young children is associated with an adverse effect on learning. However, the long-term impact of sleep-disordered breathing (SDB) during early childhood on learning remains unknown. METHODS Questionnaires were mailed to seventh and eighth graders attending public schools whose class ranking was either in the(More)
OBJECTIVES Excessive daytime sleepiness (EDS) occurs frequently in adult patients with obstructive sleep apnea (OSA). However, the incidence of EDS in children with OSA is unknown. METHODS To determine overall daytime sleepiness in pediatric OSA, 54 children with OSA, 14 children with primary snoring (PS), and 24 controls (C) underwent an overnight(More)
A system for three-dimensional reconstruction of dynamic (moving) vascular bed structures has been developed and is described. Input images are obtained from two-view (bi-plane or ECG correlated) X-ray angiograms. A target structure consisting of vessel branch points (nodes) and lines between the branch points is entered on the first of a sequence of images(More)
Initial results obtained with a simple, fully automated algorithm for detection of left ventricular boundaries are presented. The strength of this approach is the use of dynamic programming search techniques, which allow determination of local border points to be influenced by the entire global border location. The relative contributions of mask mode(More)
OBJECTIVE This study investigates social stigma associated with a diagnosis of ADHD in adulthood and whether Big Five personality traits predict appraisals of affected individuals. METHOD A sample of 257 undergraduates rate the desirability of targets with ADHD, minor medical problems, and with no appreciable weakness, across several social engagement(More)