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A Proposed Reorientation

Kenneth E. Livingston, MD; Alfonso Escobar, MD

Arch Neurol. 1971;24(1):17-21.

	Since this article does not have an abstract, we have provided the first 150 words of the full text PDF and any section headings.

THE HISTORICAL development of the limbic system concept has given major emphasis to the limbic structures of the medial wall of the cerebral hemisphere. This persisting medial orientation fails to give appropriate recognition to important limbic system components which are oriented in the basolateral plane. Such a conceptual imbalance can be corrected without altering current limbic system nomenclature.

In 1878, Broca¹ designated as "le grand lobe limbique," a group of anatomically prominent structures on the medial wall of the cerebral hemisphere, including the cingulate, retrosplenial, and hippocampal gyri. These gyri, traditionally regarded as part of the olfactory apparatus, form a "limbus" (rim or margin) surrounding the site of lateral evagination of the embryonic neural canal from which the hemispheres develop.

During the following 60 years, there was increasing evidence to suggest that the structures of Broca's limbic lobe are not exclusively olfactory. Prior to 1901 on the . . . [Full Text PDF of this Article]

Author Affiliations
Toronto; Mexico City

From the Department of Surgery (Neurosurgery) (Dr. Livingston), University of Toronto, Toronto, and the Institute of Biomedical Investigation (Dr. Escobar), National University of Mexico, Mexico City.

Footnotes
Accepted for publication Aug 4, 1970.

Read in part before the annual meetings of the Neurosurgical Society of America, Ojai, Calif, March 28, 1970, and the Society of Neurologic Surgeons, Boston, April 17, 1970, and the Second International Congress of Psychosurgery, Copenhagen, Aug 24, 1970.

Reprint requests to Wellesley Hospital, 160 Wellesley St E, Toronto 5, Ontario, Canada (Dr. Livingston).

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