What does metencephalon mean?
The metencephalon is a technical anatomical term for the part of the brain that includes the pons and cerebellum. It lies toward the rear of the hindbrain and also names the corresponding embryonic secondary brain vesicle, from which those adult structures develop. In ordinary conversation, the word is uncommon because speakers usually refer to the pons or cerebellum directly, or discuss the hindbrain more broadly. In anatomy, embryology, and comparative neurobiology, however, metencephalon is useful when precision matters: it groups these structures by their shared developmental origin and contrasts with neighboring brain divisions such as the telencephalon and mesencephalon. It can appear in descriptions of vertebrate brain organization, developmental abnormalities, lesions, and experimental studies. Its specialized register gives it a technical rather than everyday flavor, but recognizing it clarifies how a diagram or article divides the brain into developmentally related regions.
nounThe portion of the brain comprising the pons and cerebellum, corresponding to the embryonic brain vesicle from which those structures develop.
- The region of the adult brain comprising the pons and cerebellum, treated as a developmental and comparative-anatomical division.
- The embryonic secondary brain vesicle that develops into the pons and cerebellum.
"During embryonic development, the metencephalon gives rise to the pons and cerebellum."
"During embryonic development, the metencephalon gives rise to the pons and cerebellum."
"Damage to the metencephalon can affect balance, coordination, and several important brainstem functions."
The plural is used in embryological and comparative anatomy.
"The atlas compares the metencephala of several vertebrate groups."
The metencephalon is the brain’s bridge-and-balance center: the pons relays signals, while the cerebellum fine-tunes movement and posture.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Where does metencephalon come from?
Metencephalon is a Latinized New Latin anatomical term formed from Greek meta-, meaning “after” or “beyond,” and enkephalon, meaning “brain” and literally “in the head.” The meta- element distinguishes the posterior division of the embryonic rhombencephalon, while the shared -encephalon element links the term to telencephalon and mesencephalon. The compound became established in 19th-century embryological and comparative anatomical usage.
Related word forms
How metencephalon is actually used
This is a specialized anatomical term used chiefly in neuroanatomy, embryology, and comparative biology. It is uncommon in general prose and denotes a more precise division than the broad term hindbrain.
Easily confused with metencephalon
The mesencephalon is the midbrain, whereas the metencephalon includes the pons and cerebellum.
The telencephalon is the forebrain region that includes the cerebral hemispheres, not the pons and cerebellum.