Feedbacks' Influence on Decision Making Processes

Neural bases of feedbacks' influence on decision making processes

Galvanic Vestibular Stimulation (GVS) stimulates the vestibular system through low intensity electric currents applied at the basis of the VIII cranial nerve, upon the mastoid processes. In the Right-Anodal condition the positive electric charge is applied through electrodes placed upon the right mastoid and it mainly activates structures within the left brain hemisphere. In the Left-Anodal condition the positive electric charge is applied through electrodes placed upon the left mastoid and it mainly activates structures within the right brain hemisphere. In the SHAM condition, low intensity electric currents are applied 5 cm below the mastoid processes. This condition does not activate the vestibular system and serves as a control condition to account for unspecific activating effects of all electric stimulations (e.g., arousal, discomfort). The three conditions will be applied in three different sessions (i.e. days) in randomized order.