Ayahuasca belongs to the group of plant-based or vegetal hallucinogens sharing their alterating effects on the state of consciousness and causing perceptual alterations. Traditionally used as a concoction in ceremonial rites aimed to achieve experiences of spiritual or curative content, its use has expanded throughout centuries, reaching our current cultural context, where it is used by small groups guided by purposes of personal growth. The experience usually lasts a few hours and the effects are usually self-limited. We describe the case of a patient who developed a manic episode with psychotic symptoms after experimental consumption of ayahuasca. In addition, a systematic review of published cases of sustained psychotic symptoms after the consumption of ayahuasca is carried out. There are few experimental studies of the relationship between ayahuasca and psychotic experiences, althoug...

The physician, physiologist and psychologist Wilhelm Wundt has been and is considered the founder of experimental psychology due to his approach to psychological subjects, until then intuitive, through the XIX century methods. Thus, a new discipline, the Scientific Psychology, emerged in the venue of a laboratory in the town of Leipzig, Germany. Nevertheless, Wundt´s labor was not restricted to the study of psychology from a scientific perspective: on one hand, his great convocational, organizing and group-working capacity attracted lots of investigators from around the world to be trained. In n original laboratory, On the other, he substantially modified the study of psychology centering the researchers’ attention in the detailed analysis of consciousness through the use of the method called introspection.