Limbic system
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The limbic system, also known as the paleomammalian cortex, is a set of brain structures located on both sides of the thalamus, immediately beneath the medial temporal lobe of the cerebrum primarily in the forebrain.
Cross section of the human brain showing parts of the limbic system from below. Traité d'Anatomie et de Physiologie (1786)
The limbic system largely consists of what was previously known as the limbic lobe.
Emotion
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Emotions are physical and mental states brought on by neurophysiological changes, variously associated with thoughts, feelings, behavioral responses, and a degree of pleasure or displeasure. There is no scientific consensus on a definition. Emotions are often intertwined with mood, temperament, personality, disposition, or creativity.
Sixteen faces expressing the human passions – colored engraving by J. Pass, 1821, after Charles Le Brun