Bio Systems
October 1, 2026
Hans Contreras-Pulache
Pedro Ortiz Cabanillas (1933-2011), a Peruvian neurologist and professor at Universidad Nacional Mayor de San Marcos, spent five decades building an Sociobiological Informational Theory: a systematic account of the universe, life, and organized society built around a single, redefined concept -information- understood as a material structure exclusive to living systems. Two works anchor his...
Human Arenas
May 17, 2026
Hans Contreras-Pulache, Diego Carrera-Hidalgo, Ana Astorga-Cota et al.
This article examines Pedro Ortiz Cabanillas’s original model of nervous system organization, as presented in the second edition of Introducción a una Psicobiología del Hombre (2010). The framework integrates three core components —emotional, productive, and volitional— across five hierarchical levels (cellular, tissue, neural, paleocortical, and neocortical), which in turn span biological,...
Frontiers in Psychology
August 22, 2025
Jeel Moya-Salazar, Hans Contreras-Pulache
This article presents a novel perspective on the structure and function of the human cortex, grounded in the Sociobiological Informational Theory (SIT). SIT offers a conceptual framework that integrates biological, psychological, and social dimensions of brain activity, challenging traditional anatomical and physiological models. Under this perspective, the neocortex is interpreted as the...
Revista peruana de medicina experimental y salud publica
2018
Hans Contreras-Pulache, Eduardo Espinoza-Lecca, Javier Sevillano-Jimenez
The Informational Sociobiological Theory proposes a radically-different definition of living systems and, therefore, is the only existing neurological theory that evades the mind-brain problem and explains the nature of human consciousness. It was developed by Pedro Ortiz Cabanillas between 1984 and 2011. In this document we are presenting a listing of his main works. We include, additionally,...