Patients with obsessive-compulsive disorder are characterised by persistent thoughts and repetitive behaviours. A new study reveals that sufferers worry considerably more than the general population in the face of morality problems.
Along with the help of experts from the Barcelona's Hospital del Mar and the University of Melbourne (Australia), researchers at the Hospital de Bellvitge in Barcelona have proven that patients with obsessive-compulsive disorder, known as OCD, are more morally sensitive.
"Faced with a problem of this type, people suffering from this type of anxiety disorder show that they worry considerably more," as explained to SINC by Carles Soriano, researcher at the Catalan hospital and one of the lead authors of the work published in the journal Archives of General Psychiatry.
Using functional magnetic resonance imaging, the experts studied the neurofunctional basis of this increased moral sensitivity. They measured the brain activity of a group of 73 patients with OCD and 73 healthy patients when faced with different moral problems in which they had to choose between two alternatives both leading to very negative consequences.
For example, they were faced the dilemma of the crying baby, a classic in philosophy classes. They were asked to imagine themselves in a hypothetical war. Enemy soldiers lie in wait to attack and the entire village hides in a cellar. A baby starts to cry. If nobody makes the baby stop, the soldiers will discover everyone. Would it be justifiable to smother the baby's cry running the risk of suffocating it to save the others?
"The brain activations displayed by participants in the face of such a moral question were compared to those displayed for trivial choices, like choosing between going to the countryside or the beach for the weekend," as Soriano points out.
The results verified that during situations of moral dilemma those subjects with OCD displayed a higher degree of activation in the orbitofrontal cortex, especially in the medial part, which is linked to decision making processes and the development of moral sentiment.
"The data allows us for the first time to objectify the existence of cerebral dysfunctions related to alterations in complex cognitions, such as experiencing morality," adds the researcher from Catalonia. "This allows us to expand further on the characterisation of altered cerebral mechanisms in OCD."