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the (phylogenetically) old brain; all of the brain except the cerebral cortex and its dependences.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
L. Edinger's term for the metameric nervous system. Excludes cerebral cortex.
[paleo- + G. enkephalos, brain]
Farlex Partner Medical Dictionary © Farlex 2012
paleencephalonAn obsolete, imprecise term for the phylogenically oldest component of the brain.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
paleencephalon, paleoencephalon (pā″lē-ĕn-sĕf′ă-lŏn) (pā″lē-ō-ĕn-sĕf′ă-lŏn) [Gr. palaios, old, + enkephalos, brain]
The phylogenetically older portion of the brain. It includes all of the brain except the cerebral cortex and its allied structures.
Medical Dictionary, © 2009 Farlex and Partners