metencephalon
(noun)
The portion of the embryonic rhombencephalon from which the pons and cerebellum arise.
Examples of metencephalon in the following topics:
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Development of the Central Nervous System
- At six weeks in human embryo development, the prosencephalon divides further into the telencephalon and diencephalon and the rhombencephalon divides into the metencephalon and myelencephalon.
- The metencephalon becomes, among other things, the pons and the cerebellum; the myelencephalon forms the medulla oblongata; and their cavities develop into the fourth ventricle.
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Parts of the Cerebellum
- Anatomists classify the cerebellum as part of the metencephalon, which also includes the pons, and all its connections with other parts of the brain travel through the pons.
- The metencephalon is the upper part of the rhombencephalon, or hindbrain.
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Functions of the Brain Stem
- The pons (part of metencephalon) lies between the medulla oblongata and the midbrain.
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Midbrain
- Caudally (posteriorly) the mesencephalon adjoins the pons (metencephalon), and rostrally it adjoins the diencephalon (eg., thalamus, hypothalamus).
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Pons
- During embryonic development, the metencephalon develops from the rhombencephalon and gives rise to two structures: the pons and the cerebellum.
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Embryonic Development
- The rhombencephalon develops into the metencephalon (the pons and cerebellum) and the myelencephalon (the medulla oblongata).