Essence and mechanisms of thinking
Thought processes are a peculiar form of "behavior" at the informational level. A thought acts as a derivative of objective reality while simultaneously representing a form of abstraction. In human consciousness, it subjectively reflects the dynamics of existing needs, as well as the anticipation of specific objects and ways to satisfy them.
Physiologically, this process is realized through the comparison of current reactions to external stimuli with memory mechanisms. During thought processes, a highly complex transformation of ideal informational processes of the brain into material manifestations (such as motor acts) takes place. A crucial feature is that thinking is frequently limited exclusively to internal neurodynamic processes without any external expression.
Architectonics of the functional system of thinking
From the perspective of the general theory of functional systems, thought processes rely on universal nodal components:
- Initial needs. Biological and social stimuli form the dominant motivation.
- Mental result. Acts as the leading system-forming factor.
- Predictive programming. Carried out by the informational mechanisms of the action result acceptor, which is based on afferent synthesis and decision-making.
- Result evaluation. Proceeds via feedback afferentation mechanisms, where actual outcomes are compared with predicted ones.
- Effector expression. Includes behavioral reactions, somatovegetative shifts, emotions, and a specially organized speech apparatus.
The entire process is continuously accompanied by subjective emotional experiences that reflect the assessment of the need and the probability of its satisfaction.
Verbal quantization and human uniqueness
A unique feature of humans is recognized as the verbal quantization of thinking. The assessment of needs and external influences here occurs not only through emotional sensations but also using linguistic symbols, discrete phrases, and verbal constructions. This level of functioning necessarily requires special training.
Thoughts formed on a verbal basis can transform in several ways:
- Remaining at the level of inner speech.
- Transitioning into specific emotional reactions.
- Being expressed through external speech (oral or written).
- Embodying into actions.
Despite the fact that the verbal basis imparts qualitatively new informational properties to mental activity, the general structure of the functional system retains all its typical features. The structural foundations of these processes are confirmed by clinical observations of patients with localized brain lesions.
Dynamics and stages of thought formation
The dynamics of thinking are determined by systemquanta — discrete units of mental activity. Their main feature lies in their predictive nature relative to environmental events. Systemquanta form the basis for satisfying needs, intuition, logical operations, and creative activity.
The systemic process of thought formation includes a series of successive stages:
- Key among them is decision-making (the imperative stage).
- Its completion is marked by the formation of the action result acceptor apparatus.
- At this stage, the thought takes the form of an ideal anticipation of the result (the subject determines what precisely to strive for).
Goal setting is always present in the structure of any thought. The success of planning and achieving these goals directly depends on the subject's level of knowledge, upbringing, and prior training.
Briefly: answers to topical questions
Which specific brain structures provide verbal quantization of thinking?
The process of verbal quantization and speech support of thought processes relies on the interaction of specific centers in the cortex of the left (dominant) hemisphere:
- Wernicke's area — posterior sections of the first (superior) temporal gyrus (planum temporale region). Creates the semantic structure of the utterance.
- Broca's area — lower third of the frontal gyrus. Forms the detailed vocalization program.
- Facial areas of the motor cortex — precentral gyrus, where commands for cranial nerves are developed.
What neurophysiological mechanisms underlie the formation of the action result acceptor?
The formation of the action result acceptor is based on the mechanisms of afferent synthesis and decision-making, and reflects the process of goal setting. It is based on:
- Sensory-biological convergence — the convergence of various types of excitations on cortical neurons.
- Predictive excitations — the formation of an apparatus that predicts the result.
- Participation of memory and emotions — prior experience and emotional processes participate in the formation of the action result acceptor and the emotionally colored goal.
What types of afferentation participate in the stage of afferent synthesis?
The stage of afferent synthesis involves:
- Motivation.
- Situational afferentation — interacts with dominant motivation and memory mechanisms.
- Memory mechanisms.
- Trigger afferentation — serves as the permissive component of the stage, reveals the pre-trigger integration formed in the central nervous system, and determines the dominance of motivational impact, situational impact, or memory mechanisms.
How does human thinking physiologically differ from the higher nervous activity of animals?
The physiological difference between human thought processes and the higher nervous activity of animals, confirmed by sources, lies in the presence of the second signaling system in humans and the special role of speech and social factors.
| Characteristic | Humans | Animals |
|---|---|---|
| Signaling systems | First and second; the second is associated with verbal influences | First signaling system |
| Afferent synthesis | Biological motivations interact with socially determined situational afferentation and social memory mechanisms | These features of animals are not described in the sources |
| Verbal organization of thinking | Thoughts are realized into discrete phrases; verbal quantization is a human characteristic | Not described in the literature |
Social motives significantly alter the nature of human biological motives, giving them a social coloring.
To memorize the core components of the architecture of thinking, use the chain: Need → Motive → Program (acceptor) → Evaluation → Action (NMPEA).
Class and exam questions
What are system quanta in the physiology of thinking?
These are discrete units of mental activity. Their key characteristic is a pronounced anticipatory nature in relation to real events of the surrounding reality.
How does the decision-making stage physiologically conclude?
It culminates in the formation of the action result acceptor. This means the final formation of thought as an ideal anticipation of the future result.
Is thought always manifested by external actions?
No. Mental activity can be limited to internal information-processing neurodynamic processes in the brain and have no external motor or speech manifestation.
What else to study on this topic
- The role of afferent synthesis in setting the goal of the mental process.
- Mechanisms of feedback afferentation in evaluating achieved results.
- Clinical observations in focal brain lesions and their impact on thinking.
- Somatovegetative components as the effector expression of mental activity.
- Differences in information processing at emotional and verbal levels.
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