Die akute Therapie des ischämischen Schlaganfalles

Seit Etablierung unserer ersten Stroke Units als Spezialstationen zur Akutbehandlung von Schlaganfallpatienten 1996 und 1998 sind die Herausforderungen an das Management im Bereich der akuten Schlaganfalltherapie durch steigende Patientenzahlen, zunehmende Lyseraten und abnehmende Liegedauer in Kombination mit neuen, Erfolg versprechenden Therapieoptionen stetig angestiegen.     

The effect of power on susceptibility to emotional contagion

Abstract

This study explored two questions: Do people tend to display and experience other people's emotions? If so, what impact does power have on people's susceptibility to emotional contagion? We speculated that the powerless should pay more attention to their superiors (than their superiors pay to them) and should thus be especially likely to “catch” their superion' emotions as well. College students, given the role of “teacher” (powerful person) or “learner” (powerless person), observed videotapes of another (fictitious) subject relating an emotional experience. They were asked what emotions they felt as they watched their partner describe the happiest and saddest event in his life. In addition, they were videotaped as they watched the tape. As predicted, clear evidence of emotional contagion was obtained in this controlled laboratory setting. However, a direct (rather than inverse) relation between power and emotional contagion was found. Powerful subjects were more likely to display their subordinate's feelings than subordinates were to display those of the powerful other. Several possible explanations for these unexpected results were proposed.     

Effects of fornix transection upon associative memory in monkeys: Role of the hippocampus in learned action

Thirty-three monkeys took part in seven experiments designed to elucidate further the effect of fornix transection on learning and memory. In the first experiment the monkeys had to remember whether stimulus objects had previously been paired with reward or no reward, and they had to use this memory to guide choice between stimulus objects at retention tests according to an arbitrary rule which they had learned: to choose objects previously paired with no reward in preference to objects previously paired with reward. Fornix transection produced a severe and permanent impairment in this task. In the second experiment the monkeys also had to remember object-reward associations but the performance rule was more natural: to choose objects previously paired with reward. Here fornix transection had no effect. The third experiment required the monkeys to remember, given a stimulus object, which of two events of equal valence had previously been the outcome of displacing that object. The two events were either a peanut and a sultana or a black penny and a white penny of equal secondary reinforcing value. Performance was unimpaired by fornix transection. The fourth experiment also demonstrated, in a different paradigm, unimpaired recall of sensory events. The fifth experiment demonstrated an impairment following fornix transection in acquisition of simultaneous spatial-visual conditional discriminations; the sixth demonstrated normal learning by fornix-transected monkeys of a successive spatial-visual conditional discrimination and the seventh demonstrated unimpaired acquisition of a simultaneous auditory-visual conditional discrimination. These results, when considered in detail and together, are incompatible with existing hypotheses of hippocampal function. A new hypothesis is discussed.