Knowra Limbic system Limbic system The limbic system is a set of interconnected brain structures involved in emotion, motivation, learning, and memory. Its boundaries vary across scientific accounts.
Amygdala : A group of nuclei in the medial temporal lobe involved in emotional learning and threat processing. It helps assign emotional significance to events and cues.
Papez circuit : A proposed brain circuit connecting hippocampal, thalamic, hypothalamic, and cingulate regions. It is a classic account of how connected structures can support emotional experience.
Paul Broca : A French physician and anatomist known for work on language and the brain’s limbic lobe. He introduced the nineteenth-century anatomical idea from which the term developed.
Neocortex : The evolutionarily recent, six-layered part of the cerebral cortex involved in perception, cognition, and voluntary action. Its functions and anatomy contrast with the structures often grouped under the limbic label.
Hippocampus : A medial temporal lobe structure essential for forming episodic memories and supporting spatial navigation. It links limbic circuitry to the formation of new memories.
Reward system : A network of brain pathways that supports reward learning, motivation, and reinforcement. Its motivational functions overlap with structures commonly included in limbic circuitry.
Limbic lobe : A ring-like arrangement of cortical regions on the medial surface of the cerebral hemisphere. The limbic system’s name derives from this older anatomical grouping.
Basal ganglia : A group of subcortical nuclei involved in action selection, movement, and habit learning. They contribute to motivation and learning but are usually distinguished from limbic structures.
Hypothalamus : A brain region that regulates hormones, autonomic functions, appetite, temperature, and other bodily states. It connects motivational states with bodily and endocrine responses.
Fear conditioning : A form of associative learning in which a neutral cue comes to predict an aversive event. It demonstrates how emotional learning depends on interactions among limbic and sensory regions.
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