mesencephalonn.
/ˌmɛsɛnˈsɛfəlɒn/, /ˌmɛsɛnˈsɛfl̩ɒn/, /ˌmɛsɛnˈkɛfəlɒn/, /ˌmɛsɛnˈkɛfl̩ɒn/, U.S. /ˌmɛzənˈsɛfəl(ə)n/; see also meso- comb. form. Anatomy and Zoology.
The middle part of the developing brain; (now) spec. the midbrain; the part of the brainstem derived from the middle cerebral vesicle of the embryo, consisting of the crura cerebri, tegmenta, tectum, and cerebral aqueduct.
ΘΚΠ
the world > life > the body > nervous system > cerebrospinal axis > brain > parts of brain > [noun] > regions of brain
mesencephal1839
mesocephale1839
mesencephalon1846
prosencephalon1846
mesocephalon1857
midbrain1864
metencephalon1867
brain mantle1874
thalamencephalon1875
procerebrum1884
metepencephalon1885
thalamencephal1891
telencephalon1893
rhombencephalon1895
pretectum1961
1846 R. Owen Lect. Compar. Anat. Vertebr. Animals 177 The next succeeding primary division of the brain, is called the ‘mesencephalon’.
1875 T. H. Huxley in Encycl. Brit. I. 767/1 The mesencephalon is divided above..into two optic lobes.
1936 S. R. Detwiler Neuroembryol. ix. 119 In later experiments..Nicholas removed the embryonic mesencephalon.
1977 Lancet 9 July 64/1 There was no injury to the mesencephalon in 3 cases, while the telencephalon escaped injury in 2 cases.
1999 Development 126 3533 The prosencephalon, or embryonic forebrain, grows within a mesenchymal matrix of local paraxial mesoderm and of neural crest cells (NCC) derived from the posterior diencephalon and mesencephalon.
This entry has been updated (OED Third Edition, September 2001; most recently modified version published online March 2022).
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n.1846