Cortical theory of emotions

Role of limbic system structures

Although the theory is called "cortical," it is impossible to consider higher nervous activity in isolation from subcortical formations. The limbic system acts as a crucial modulator of affective states.

The following key structures take part in regulation:

• Amygdala;
• Hippocampus;
• Septum.

The main physiological task of these formations lies in directly influencing the intensity of experiences. They provide either pronounced suppression (inhibition) or significant enhancement (activation) of the emotional background depending on the current needs of the organism and incoming signals.

Effects of cerebral cortex removal (decortication)

Understanding the functions of the cortex is largely based on experiments involving its removal — decortication. Experiments on laboratory animals have convincingly proven that with the physical absence of the cerebral cortex, the ability to experience emotions is completely preserved, but their character undergoes profound qualitative changes.

Key consequences of decortication:

1. Change in the nature of reactions. Emotional responses to any external stimuli become excessively vivid, hypertrophied, and pronounced. Unmotivated aggression becomes the dominant type of reaction.
2. Loss of directionality. The animal loses the ability to adequately assess the object that caused the emotion and direct the reaction to the correct target. Generalization of affect occurs.

Classic example from experiments: Dogs that have undergone surgery to remove the cortex completely lose the ability to recognize their owner. Instead of the expected positive emotions (joy, attachment) upon their appearance, they demonstrate pronounced aggression.

Influence of the cortex on behavior and social hierarchy

The cerebral cortex does not simply restrain primitive instincts; it performs the intricate work of integrating emotions into the complex fabric of behavior. The main function of the cortex in this context is "fine-tuning" (precise adaptation) of emotional reactions to specific goal-directed behavioral acts. Thanks to the cortex, our emotions are appropriate and help achieve results rather than destroy plans.

A special place in the regulation of complex social behavior is occupied by the temporal lobe of the cerebral cortex. In experiments with social groups of animals, the critical influence of this zone on the status of an individual was demonstrated.

If an animal occupying a dominant position (high social rank) undergoes experimental destruction of the temporal lobe, its behavior changes dramatically. As a result of this, such an individual fails to maintain leadership and rapidly moves to the lowest rung of the intragroup hierarchy.

Class and exam questions

What else to study on this topic

• Mechanisms of emotion suppression by limbic system structures
• The role of the amygdala in the formation of aggressive behavior
• Physiological basis of visual pattern recognition (owner) and emotions
• Connection of the temporal lobe with social rank: neurobiological pathways
• The concept of "fine-tuning" emotions to goal-directed behavior

Other topics in the "Emotions" section

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