Christan Dobel

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OBJECTIVES Event-related potential correlates of phonological encoding - as compared with lexical access and semantic categorization - were measured in two studies involving two groups of 14 German and 14 Italian subjects. METHODS A two stimulus reaction time paradigm was used. Stimulus pairs presented one-by-one with 2 s inter-stimulus intervals (ISI)(More)
Event-related potentials (ERPs) were recorded from 19 aphasic patients and 18 controls in four versions of a feature comparison task, in which the verbal or pictorial representation of a first stimulus (S1) had to be compared with the verbal or pictorial representation of a second stimulus (S2) presented 2 s later. These tasks were designed to cover some of(More)
The post-imperative negative variation (PINV) comprises a slow negative potential shift extending up to several seconds following a signaled taskrelevant stimulus or response. This slow negativity is particularly intriguing, since it seems to be a component of event-related potentials which is found to be larger in amplitude in schizophrenics than in(More)
BACKGROUND Acute stress is a stereotypical, but multimodal response to a present or imminent challenge overcharging an organism. Among the different branches of this multimodal response, the consequences of glucocorticoid secretion have been extensively investigated, mostly in connection with long-term memory (LTM). However, stress responses comprise other(More)
The time course of the event related potentials evoked within a delayed matching to sample task employing verbal and pictorial stimuli was analyzed with a source reconstruction method (minimum norm method). During signal stimulus presentation pictorial stimuli evoked more activity than verbal stimuli. Activity was particularly prominent in left frontal(More)
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