The research studies in an interdisciplinary level the 45th street neighborhood, located between the Universidad Nacional on the avenida 30, and the Universidad Javeriana on the carrera 7 a , the avenida 40 parallel to the Arzobispo river and the calle 53, in order to study different logics not only in a physical way, but also studying the inhabitants behaviors, particularly the university students who walk across everyday. This research has started with the study of theories related with the city construction, that approach us to the architecture and psychoanalysis theories which are important to understand the neighborhood social ties.