R Roberts

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At the National Hospital, video-EEG telemetry is performed on about 100 patients per year and ambulatory EEG recordings on about 40 patients per year. For clarification of the diagnosis of odd attacks of uncertain cause 55% of the patients are selected, and 35% for the investigation of established epilepsy. The equipment employed for the long-term EEG(More)
Recent investigations into the neural basis of elite sporting performance have focused on whether cortical activity might characterize individual differences in ability. However, very little is understood about how changes in brain structure might contribute to individual differences in expert motor control. We compared the behavior and brain structure of(More)
The present study tested a trial tracking hypothesis that rats' matching accuracy to sample modality (onset of chamber lights or a tone) in a successive delayed matching task is, in part, determined by their ability to determine whether they are within or between trials during an interstimulus interval. In this discrimination rats had to respond to an(More)
T he diagnosis of acute myocardial infarction for some time has been based on the World Health Organizationn s " two out of three " criteria, namely: angina, electrocardiographic changes, and elevated plasma enzymes. This was devised in 1959 before clinical application of plasma isoenzymes. It was soon realized that Q-waves on the EGG, while very specific,(More)
During one six-month period 11 patients were referred with a diagnosis of coronary artery disease, because of recurrent episodes of severe, prolonged retrosternal chest pain necessitating from one to seven hospital admissions per patient for "suspect myocardial infarction". In no instance was this diagnosis proved by electrocardiogram or serum enzyme(More)
BACKGROUND Adverse event (AE) rates for interventional stroke trials are not well established. AIMS We prospectively evaluated control arm AEs from a randomized stroke trial to establish expected rates of neurologic AEs. METHODS Control data from the Safety and Efficacy of NeuroFlo Technology in Ischemic Stroke (SENTIS) Trial were evaluated. Patients(More)
Right hemisphere dominance for visuo-spatial attention is characteristically observed in most right-handed individuals. This dominance has been attributed to both an anatomically larger right fronto-parietal network and the existence of asymmetric parietal interhemispheric connections. Previously it has been demonstrated that interhemispheric conflict,(More)
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