Classification of Activity Programs
Depending on environmental stability, the central nervous system implements two fundamentally different types of programming:
- In constant conditions, automated activity is launched. The brain operates according to pre-mastered, clear instructions without unnecessary energy expenditure.
- In changing conditions, a flexible approach is required. Programming is performed dynamically, adapting to new incoming data and unpredictable environmental factors.
Rigid Programming: Operating on Autopilot
This type is characteristic of stable environments, well-practiced skills, and genetically determined instinctive activity. Its main task is satisfying basic biological needs with minimal conscious participation.
Principles of rigid programs:
- Total foresight: The brain pre-predicts absolutely all action outcomes, ranging from intermediate steps to the final result.
- Strict sequence: Progression to each subsequent step is possible only after the central nervous system receives complete information about the successful completion of the previous stage.
- Subconscious control: The process runs in the background without overloading attention.
A classic example from the physiology of movement is an adult walking down stairs. Each subsequent step is taken only after the brain receives signals of reverse afferentation (feedback from muscles and joints) indicating that the previous step was stable. Consciousness does not interfere; it is activated exclusively in inadequate situations—for instance, if a person suddenly slips or encounters an obstacle. At that moment, the program breaks down, and conscious problem-solving is required.
Dynamic Programming: Flexible Adaptation
When an individual encounters non-standard, changing, or extreme conditions, rigid algorithms cease to function. Dynamic programming comes to the foreground.
Unlike rigid schemes, here the brain foresees only the most significant environmental factors critical for satisfying the initial need. Insignificant details and intermediate results can be easily ignored.
Feature of the mechanism:
- Conditioned stimuli act as guiding threads. Relying on them, the subject instantly predicts the properties of the future outcome.
- Programs exhibit high plasticity and are often temporary.
- The behavioral algorithm is easily rearranged depending on how conditional signals are associated with reinforcing influences.
If habitual environmental signals cease to yield expected reinforcement, they lose their signaling significance. Consequently, the subject quickly switches and begins seeking other, more reliable stimuli that will lead to the satisfaction of the leading need.
Role of Motivation and Program Construction
Dynamic programs do not appear out of nowhere; they are formed through learning and continuous interaction with the external environment. This process includes two parallel lines:
- Enrichment of the action result acceptor (ARA) with new experience.
- Improvement of the effector apparatus (searching for optimal ways to achieve the result).
Ultimately, the efferent synthesis apparatus is refined in the individual.
Dominant motivations, based on biological or social needs, serve as the foundation for any cognitive activity.
How motivation directs thinking: First, anticipatory retrieval of informational images from the ARA occurs—the brain literally "recalls" what the required result should look like. Then, excitation encompasses all neural pathways up to the "final destination": the state when information regarding need satisfaction arrives. This complex of selectively excited brain structures guides the entire course of thoughts. Regulation is continuous: the brain constantly compares real reverse afferentation from external stimuli with the ideal image of the required result until the dominant need is met.