Career
He founded the Child and Adolescent Psychiatry subspecialty program at National Autonomous University of Mexico (Universidad Nacional Autónoma de México) in 1972. He also founded and was the first president of AMPI (Mexican Child Psychiatry Association) in 1975. He was the training director of the only Child and Adolescent Psychiatry training program in Mexico, at Universidad Nacional Autónoma de México, from 1972 until 1998.
In the last quarter of the twentieth century, he was considered the most influential psychiatrist in Mexico.
In the early eighties, he was simultaneously President of the Mexican Psychoanalytic Association. Secretary General of the Mexican Board of Psychiatry.
Director of Child and Adolescent Psychiatry at Universidad Nacional Autónoma de México. And Main Consultant to the System for the Integral Development of the Family (DIF), a nationwide government funded system of child and family guidance centers. His later contributions have been in Bioethics, and he has evolved into a researcher within this field and an International Psychoanalytic Association officer
He lived and practiced from 2009 to 2013 in Barcelona, Spain.
His most recent book, "Ética en Psiquiatría, Psicoanálisis y Psicoterapia" ("Ethics in Psychiatry, Psychoanalysis, and Psychotherapy") was published and distributed by Palibrio Publishers in May of 2013. Mann de Dayán describes the "Sensory Oversaturation Syndrome" as Isaias Lopez"s main contribution to the psychodynamics of adolescence.
According to this phenomenon, the adolescent manages to move away from his own narcissistic needs by overstimulating himself, as a first step before he projects his needs to outside sources.