neencephalon
Definition
- Noun:
- The part of the brain having the most recent phylogenetic origin; the cerebral cortex and related parts: In neuroanatomy, the neencephalon refers to the newest structures of the brain from an evolutionary perspective. It is primarily composed of the cerebral cortex and its associated components, which are responsible for higher-order functions like conscious thought, language, and fine motor control.
Usage Examples
- Noun:
- The development of the neencephalon is what distinguishes mammals from more primitive vertebrates.
- Cognitive functions such as reasoning and planning are largely localized within the neencephalon.
Advanced Usage
- The term is used in comparative anatomy and evolutionary biology to discuss brain development across species. It contrasts with the paleencephalon (or "old brain"), which includes evolutionarily older structures like the brainstem.
Variants and Related Words
- Neocortex (n): A major part of the neencephalon; the outer layer of the cerebral hemispheres involved in higher functions.
- The neocortex is highly developed in primates.
- Telencephalon (n): The anterior part of the forebrain, which includes the cerebral hemispheres. The neencephalon is a functional/evolutionary concept within the telencephalon.
Synonyms
- Neopallium: A near-synonym often referring specifically to the newer parts of the cerebral cortex.
- Higher brain: An informal term contrasting with the "lower" or more primitive brain structures.
Notes on Meaning
- The word is highly specialized and primarily used in academic, medical, or scientific contexts. It is not commonly used in everyday language. Its core meaning is tied to the concept of evolutionary recency in brain structure.
Noun
-
the part of the brain having the most recent phylogenetic origin; the cerebral cortex and related parts
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