Untersuchung der Gehirnaktivierung durch visuelle sexuelle Stimulation in heterosexuellen und homosexuellen Männern mittels funktioneller Magnetresonanztomographie

Paul, Trisha; Schiffer, Boris; Zwarg, T.; Krüger, Tom; Karama, Sherif; Schedlowski, Manfred; Forsting, Michael; Gizewski, ER

doi:10.1055/s-2005-867619

Cited by 1 publication

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This pattern of activation shows an interesting parallel to the results of the first experiment, where painful stimuli resulted in activation in the anterior insula, contrasting with non-painful strong stimuli that resulted in activations of the posterior insular region. An important role for the insula for encoding pain (Craig 2003) has previously been reported, importance for encoding aversiveness by Kosslyn (1999) and (in erotic context) by Paul et al (2005). Even aversiveness of taste has been shown to correlate to activations in the opercular/insular cortex (O'Doherty et al 2001).…”

Section: Second Experimentsmentioning

confidence: 91%

Cortical correlates of perception and suppression of electrically induced pain

Freund

Stuber

Wunderlich

et al. 2007

Somatosensory & Motor Research

View full text Add to dashboard Cite

Two neuroimaging studies using fMRI were conducted in order to assess the cortical processes involved in the perception and suppression of pain. In the first study, 15 healthy subjects were stimulated with variable intensities of electrical pulses during a discrimination task. In the second study, the same subjects had to try to suppress the feeling of pain during tonic stimulation. The discrimination task resulted in cortical activation of contralateral SI, corresponding in extent to the intensity of the stimulus. Activation of contralateral operculum/posterior insula (SII) and non-dominant dorsolateral prefrontal cortex (DLPFC) with non-painful stimuli changed to activations of non-dominant anterior insula upon painful stimulation. In the second study, all subjects succeeded in suppressing the feeling of pain during previously painful levels of stimulation. During this suppression task, activations changed from anterior to posterior insula; also there was a suppression of activity in the anterior cingulated cortex (ACC) and caudate nucleus. Subjects seem to be able to suppress to a certain degree the feeling of pain under constant (and previously painful) stimulation. The cortical correlate seems to be a shift of cerebral activation from anterior to posterior right insula and a suppression of activity in the ACC and caudate nucleus.

show abstract