Chimerism is a very rare condition caused by the fusion of zygotes (fertilized eggs) into a single form during early cell duplication. It is extremely rare, with only forty or so known human cases. It is somewhat more common in the animal kingdom.
Cognitive-behavioral therapy is an action-oriented form of psychosocial therapy that assumes that maladaptive, or faulty, thinking patterns cause maladaptive behavior and negative emotions.
Definition. Cognitive therapy is a psychosocial (both psychological and social) therapy that assumes that faulty thought patterns (called cognitive patterns) cause maladaptive behavior and emotional responses. The treatment focuses on changing thoughts in order to solve psychological and personality problems.ognitive-behavioral therapy attempts to change clients' unhealthy behavior through cognitive restructuring (examining assumptions behind the thought patterns) and through the use of behavior therapy techniques.