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as originally defined by P. Broca: the nearly closed ring of the brain structures surrounding the hilus, or margin, of the cerebral hemisphere of mammals; it is composed of the fornicate gyrus (cingulate gyrus, fasciolar gyrus, parahippocampal gyrus, and uncus) and the hippocampus. See: limbic system.
Synonym(s): lobus limbicus [TA]
Etymology: L, limbus, edge; Gk, lobos, lobe
the marginal section of the cerebral hemispheres on the medial aspects. It forms a ring of neural tissue around the hypothalamus and some nuclei.
The marginal section of a cerebral hemisphere on the medial aspect. Synonym: gyrus fornicatus
See also: lobe