Role in the Behavioral Act and Informational Essence
In the structure of any goal-directed behavior, the decision-making stage strictly and sequentially follows the stage of afferent synthesis. Physiologically, this process is the logical and inevitable informational outcome of all the complex analytical work previously performed by the nervous system.
During afferent synthesis, the brain utilizes so-called probabilistic programming. At this moment, a thought may be shaped by completely different components and potentially directed toward satisfying various needs. As a result, a multitude of initial motivational thoughts is generated.
The task of the decision-making stage is to resolve this informational diversity. The process depends on all components of afferent synthesis, yet it is not passive: decision-making exerts continuous feedback influence on afferent synthesis, adjusting its course.
Physiological Mechanism and Lateral Inhibition
The central physiological task of this stage is the radical restriction of the degrees of freedom in central nervous system neurons. Out of a colossal multitude of potential activity options, the organism must select only one.
The primary neural mechanism ensuring this selection is lateral inhibition.
- This process allows the strict selection of only a limited number of neurons from the vast array of activated synaptic connections.
- Only those neuronal ensembles critically necessary to execute the chosen dominant activity are preserved.
- Other competing or collateral neural networks are effectively suppressed, preventing behavioral defocusing.
Formation of the Dominant Behavioral Line
Through the action of lateral inhibition, a strict selection occurs from the multitude of initial motivational thoughts. The brain singles out one thought—the most significant for the subject at that moment—referred to as the dominant thought.
This exact thought forms the basis for establishing the dominant behavioral line. The function of this process is to orient all of the subject's mental activity exclusively toward the direction that will lead to the satisfaction of the dominant motivation (whether a basic biological or complex social need generated earlier during afferent synthesis).
Connection to Subsequent Stages
Decision-making acts as a bridge to the practical execution of the planned action. This stage is logically followed by the efferent synthesis stage, during which the direct organization of the action itself takes place.
However, the transition to action does not happen instantaneously. A fundamental rule of behavioral physiology: the efferent synthesis (action organization) is invariably preceded by the formation of a predictive mechanism. This mechanism is called the action result acceptor. Thus, as soon as a decision is made, the brain first creates an ideal model of the future result against which the real success of the behavioral act will subsequently be checked.