Definition of mesencephalon in English:


Line breaks: mes|en¦ceph|alon
Pronunciation: /ˌmɛsɛnˈsɛf(ə)lɒn
, ˌmiːz-, -ˈkɛf-/


  • another term for midbrain.
    More example sentences
    • The latter includes the diencephalon; mesencephalon, or midbrain; pons; and medulla oblongata.
    • The neural tube is broad and divides flaccidly into three parts: an anterior prosencephalon, a middle mesencephalon, and a posterior rhombencephalon.
    • Continuing in the vocabulary vein, the ‘neuraxis’ is ‘the axial unpaired part of the central nervous system, composed of the spinal cord, rhombencephalon, mesencephalon, and diencephalon.’



More example sentences
  • Two non-sensory control regions were examined, the optic tectum and the mesencephalic tegmentum.
  • The root fibers arising from the trochlear nuclei form a decussation dorsal to the mesencephalic aqueduct, and they are the only cranial nerves that cross completely and that leave the dorsal aspect of the brain stem.
  • The principal mesencephalic projection to the striatum originates from the substantia nigra pars compacta.


mid 19th century: from Greek mesos 'middle' + encephalon.

More definitions of mesencephalon

Definition of mesencephalon in:

Get more from Oxford Dictionaries

Subscribe to remove adverts and access premium resources

Word of the day skosh
Pronunciation: skəʊʃ
a small amount; a little