Mesencephalon

The middle of the three primitive cerebral vesicles of the embryonic brain. Without further subdivision, midbrain develops into a short, constricted portion connecting the PONS and the DIENCEPHALON. Midbrain contains two major parts, the dorsal TECTUM MESENCEPHALI and the ventral TEGMENTUM MESENCEPHALI, housing components of auditory, visual, and other sensorimoter systems.

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Do not include MeSH terms found below this term in the MeSH hierarchy.

Tree Number(s): A08.186.211.132.659

MeSH Unique ID: D008636

Entry Terms:

• Mesencephalons
• Midbrain
• Midbrains

All MeSH Categories
Anatomy Category
Nervous System
Central Nervous System
Brain
Brain Stem
Mesencephalon
Cerebral Peduncle
Cerebral Crus
Substantia Nigra +
Tegmentum Mesencephali +
Locus Coeruleus
Tectum Mesencephali
Inferior Colliculi
Posterior Cerebellar Commissure
Pretectal Region
Subcommissural Organ
Superior Colliculi