Noticias CRC
Actualidad científica
The functional neuroanatomy of blood-injection-injury phobia: a comparison with spider phobics and healthy controls
mircoles, 3 de junio de 2009
Background. Most neuroimaging studies of specific phobia have investigated the animal subtype. The bloodinjection- injury (BII) subtype is characterized by a unique biphasic psychophysiological response, which could suggest a distinct neural substrate, but direct comparisons between phobia types are lacking.
Method. This study compared the neural responses during the presentation of phobia-specific stimuli in 12 BII phobics, 14 spider (SP) phobics and 14 healthy controls using functional magnetic resonance imaging (fMRI).
Results. Subjective ratings showed that the experimental paradigm produced the desired symptom-specific effects. As in many previous studies, when viewing spider-related stimuli, SP phobics showed increased activation in dorsal anterior cingulate and anterior insula, compared to BII phobics and healthy controls. However, when viewing images of blood.............................
