title: [Scope and limitations of placebo effect].
abstract: The placebo effect is difficult to measure, since any favorable response to placebo may be related to other factors, such as spontaneous  remission. There are complementary theories to explain it, such as conditioning and expectancy. In addition, the placebo effect induces neurobiological changes in the brain. However, the most important element is the interaction between doctor and patient.
authors.affiliation: Honoradio del Capítulo de Psicofarmacología de APSA, Programa de Educación Médica Continua de APSA. sergiohalsband@gmail.com
authors.forename: Sergio Aníbal
authors.initials: SA
authors.lastname: Halsband
mesh_terms: D001921:Brain; D006801:Humans; D015990:Placebo Effect