The limbic lobe is an arc-shaped cerebral cortex region of the limbic system, on the medial surface of each cerebral hemisphere of the mammalian brain, consisting of parts of the frontal, parietal and temporal lobes. The term is ambiguous, with some authors including the paraterminal gyrus, the subcallosal area, the cingulate gyrus, the parahippocampal gyrus, the dentate gyrus, the hippocampus and the subiculum;
History
Paul Broca named the limbic lobe in 1878, identifying it with the cingulate and parahippocampal gyri, and associating it with the sense of smell - Treviranus having earlier noted that, between species, the size of the parahippocampal gyrus varies with the size of the olfactory nerve.
In 1937,
James Papez theorized that a
neural circuit (the
Papez circuit) including the hippocampal formation and the cingulate gyrus constitutes the neural substrate of emotional behavior,
and Klüver and
Paul Bucy reported that, in monkeys, resection involving the hippocampal formation and the
amygdala has a profound effect on emotional responses.
As a consequence of these publications, the idea that the entire limbic lobe is dedicated to
olfaction receded, and a direct connection between emotion and the limbic lobe was established.
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