The theory of functional systems is a model that describes the structure of conduct, which was established by Russian and Soviet biologist and physiologist Pyotr Anokhin.
Functional systems were put forward by Anokhin as an alternative to the predominant concept of reflexes.
There are two types of functional systems: Choice of targets and methods of achieving them are the key factors that regulate behavior.
In addition, the behavior affect the memories of positive and negative emotions.
In general, behavioral act is characterized by meaningful and active role of the subject.