Psycho-biological Substrates of Therapeutic Benefit of Thermal Cure on Generalized Anxiety Disorders

Multicenter study comparing paroxetine (n=30) versus thermal cure (n=30) in patients with a diagnosis of Generalised Anxiety Disorders Main objective is to quantify the therapeutic benefit of a thermal cure on generalized anxiety disorders and to understand the psycho-biological substrates of this improvement. Secondary objectives: * A decrease of Insula activity at rest during the answers to aversive pictures and during the task of subjective measurement of heartbeat. * A decrease of sensibility to emotional interference by subliminal presentation of emotional words thanks to a lexical task and a color recognition task associated to simultaneous measurement of physiological indicator of emotional activity ( dermal resistance)