
pmid: 16139812
The study aimed to identify brain activation during direct and automatic processing of phobogenic stimuli in specific phobia.Responses to phobia-related and neutral pictures (spiders and mushrooms) were measured by means of event-related functional magnetic resonance imaging during two different tasks. In the identification task, subjects were asked to identify the object (spider or mushroom). In a demanding distraction task, subjects had to match geometric figures displayed in the foreground of the pictures.Phobics showed greater responses to spiders versus mushrooms in the left amygdala, left insula, left anterior cingulate gyrus (ACC), and left dorsomedial prefrontal cortex (DMPFC) during the identification task and in the left and right amygdala during the distraction task. All of these activations were also significantly increased compared to control subjects who did not show stronger brain activation to spiders versus mushrooms under any task condition.Our findings propose specific neural correlates of automatic versus direct evaluation of phobia-relevant threat. While the amygdala, especially the right amygdala, seems to be crucially involved in automatic stimuli processing, activation of areas such as the insula, ACC and DMPFC is rather associated with direct threat evaluation and requires sufficient attentional resources.
Adult, Cerebral Cortex, Brain Mapping, Brain, Prefrontal Cortex, Spiders, Amygdala, Gyrus Cinguli, Magnetic Resonance Imaging, Pattern Recognition, Visual, Phobic Disorders, Reference Values, Animals, Humans, Attention, Female, Evoked Potentials, Photic Stimulation
Adult, Cerebral Cortex, Brain Mapping, Brain, Prefrontal Cortex, Spiders, Amygdala, Gyrus Cinguli, Magnetic Resonance Imaging, Pattern Recognition, Visual, Phobic Disorders, Reference Values, Animals, Humans, Attention, Female, Evoked Potentials, Photic Stimulation
| selected citations These citations are derived from selected sources. This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | 165 | |
| popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network. | Top 10% | |
| influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | Top 10% | |
| impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network. | Top 1% |
